4.3L performance suggestions? - S-10 Forum
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post #1 of 53 Old 11-30-2010, 02:42 PM Thread Starter
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4.3L performance suggestions?

anyone have suggestions for a 1992 4.3L TBI 'Z' code engine with a 5 speed for performance? it is a daily driver and has an exhaust on it, considering cam, not over the top but not too mild. would like to keep TBI, cat, and 4.3L.
suggestions on cam, lifters, etc. what do i gain, what do i lose, what does it cost, difficulty? it has to be budget friendly.


-1992 Chevrolet S10 Blazer Tahoe. 2 dr, 2wd, vin 'Z' 4.3L V6, 5 speed, exhaust
-1998 Chevrolet Blazer LS. 4 dr, 2wd, vin 'W' 4.3L V6, auto, stock. Sold
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post #2 of 53 Old 11-30-2010, 10:25 PM
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Re: 4.3L performance suggestions?

first of all your heads flow nothing.

b4 you start modding a TBI engine you need to make it breathe. You can add a cam, but the heads wont flow enough for the cam. you wont get full potential out of the cam.

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post #3 of 53 Old 11-30-2010, 10:59 PM Thread Starter
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Re: 4.3L performance suggestions?

what head would you recommend? vortec or aftermarket?

-1992 Chevrolet S10 Blazer Tahoe. 2 dr, 2wd, vin 'Z' 4.3L V6, 5 speed, exhaust
-1998 Chevrolet Blazer LS. 4 dr, 2wd, vin 'W' 4.3L V6, auto, stock. Sold
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post #4 of 53 Old 12-01-2010, 12:42 PM
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Re: 4.3L performance suggestions?

Well unfortunately after market only has one maker of heads and you want to be budget friendly so your out of luck on that. If you don't wanna spend tons and keep it simple a good upgrade would be a set off like a 95. Not as good as 96 and newer but will flow a good deal more then the ones you have and are direct bolt on for everything. I used a set for years until stepping up and emptying my wallet. From there you can drop a custom cam in (you'll be happier with a custom) and have the heads set for the cam at the machine shop while there doing the heads. You can call the chip companies and they burn a prom for you to except the changes to the motor so everything functions correctly. From there you can drop a Edelbrock intake on and full exhaust. Depending on your budget.

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post #5 of 53 Old 12-01-2010, 02:21 PM
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Re: 4.3L performance suggestions?

find a set of vortec heads...if you can't...and can afford the 200+ shipping, i've got a set.

Brian

01 xtreme 4.3L 5spd 2/3 drop w/ SS front bumper|.030 over|270 comp cam|500 lift|dual valve springs|10:1 C/R|p&p heads w/ 3 angle valve job|w4me tune|shorty headers|2.25 y pipe|no cat|Spintech muffler|windage tray|LW flywheel|DF clutch|8mm wires|no ac|efan|walbro 255|MPFI upgrade|Comp Cam timing chain|ARP bolts/studs|totaled***
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post #6 of 53 Old 12-01-2010, 02:46 PM Thread Starter
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Re: 4.3L performance suggestions?

would a newer (2001+) vortec 'w' code or 'x' code be better? more bang for my buck? and are there direct swap cams available for the vortec tbi v6s that new? it would certainly make for more reliability, maybe easier to tune? would it drop right in, do i need the trans? driveshaft? wiring harness? anything else?

-1992 Chevrolet S10 Blazer Tahoe. 2 dr, 2wd, vin 'Z' 4.3L V6, 5 speed, exhaust
-1998 Chevrolet Blazer LS. 4 dr, 2wd, vin 'W' 4.3L V6, auto, stock. Sold
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post #7 of 53 Old 12-01-2010, 03:47 PM
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Re: 4.3L performance suggestions?

To swap to the newer motor you will need everything from, motor, trans harness whole 9 yards if you want the fuel injection. You can swap on 96 and newer heads but would need a intake that would let you swap back to your fuel injection. As far as reliability your motor is just as reliable as the newer ones if not a little better on the injection side as far as not having issues. The newer ones seem to have on occasion.

1988 S-10. Built for all out drag racing. 4.3L based 309 nitrous fed power house. Holley Dominator EFI with large amounts of dry nitrous
1.46 60ft
6.4at 112 1/8mile
10.02 at 136 1/4 mile Best MPH 136
1992 S-10 silver Sunday grocery getter.
2000 Z-R2 DD
Complete custom 309 V6 with truck build
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post #8 of 53 Old 12-09-2010, 04:47 PM Thread Starter
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Re: 4.3L performance suggestions?

http://www.youtube.com/watch?v=R9dA0...eature=related
http://www.youtube.com/watch?v=4A718...eature=related


I'd like my blazer to sound like those...and I'll be saving up money for the vortec heads and head work, the cam, the headers, tune, etc.

-1992 Chevrolet S10 Blazer Tahoe. 2 dr, 2wd, vin 'Z' 4.3L V6, 5 speed, exhaust
-1998 Chevrolet Blazer LS. 4 dr, 2wd, vin 'W' 4.3L V6, auto, stock. Sold
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post #9 of 53 Old 12-10-2010, 12:03 AM Thread Starter
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Re: 4.3L performance suggestions?

2 more

http://www.youtube.com/watch?v=ahThCr5hEeQ
http://www.youtube.com/watch?v=WHl2al3bvIY

-1992 Chevrolet S10 Blazer Tahoe. 2 dr, 2wd, vin 'Z' 4.3L V6, 5 speed, exhaust
-1998 Chevrolet Blazer LS. 4 dr, 2wd, vin 'W' 4.3L V6, auto, stock. Sold
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post #10 of 53 Old 12-10-2010, 12:42 AM
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Re: 4.3L performance suggestions?

Considering 2 of the 4 videos were actually V8s, I think that is the route you might look into.
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post #11 of 53 Old 12-10-2010, 12:52 AM
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Re: 4.3L performance suggestions?

Vortec heads, 2114 Edelbrock manifold, 100 wet shot, Cam, Stall, tune.

/end

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post #12 of 53 Old 12-10-2010, 10:59 AM Thread Starter
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Re: 4.3L performance suggestions?

Quote:
Originally Posted by Warren262 View Post
Considering 2 of the 4 videos were actually V8s, I think that is the route you might look into.
actually only one is a v8, 2 state they are 4.3L the other references a 5.3L but not in the truck...no where does it say it IS a v8. the blue truck is a 4.3L and thats what I want it to sound like most.

-1992 Chevrolet S10 Blazer Tahoe. 2 dr, 2wd, vin 'Z' 4.3L V6, 5 speed, exhaust
-1998 Chevrolet Blazer LS. 4 dr, 2wd, vin 'W' 4.3L V6, auto, stock. Sold
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post #13 of 53 Old 12-10-2010, 11:00 AM Thread Starter
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Re: 4.3L performance suggestions?

Quote:
Originally Posted by 1fast4by View Post
Vortec heads, 2114 Edelbrock manifold, 100 wet shot, Cam, Stall, tune.

/end

no NOS, standard trans....Cam, heads, intake, exhaust, tune

-1992 Chevrolet S10 Blazer Tahoe. 2 dr, 2wd, vin 'Z' 4.3L V6, 5 speed, exhaust
-1998 Chevrolet Blazer LS. 4 dr, 2wd, vin 'W' 4.3L V6, auto, stock. Sold
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post #14 of 53 Old 12-10-2010, 05:53 PM
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Re: 4.3L performance suggestions?

And why did you ask anyone anything?
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post #15 of 53 Old 12-10-2010, 09:52 PM Thread Starter
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Re: 4.3L performance suggestions?

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And why did you ask anyone anything?
To get ideas, further input, if something out of the question such as NOS is input then I will let everyone know when it comes up that it is not an option same with turbo and supercharger, they're out of the budget and not what I want, it needs to be N/A and suggestions on cams, intake manifolds, exhaust manifolds, valvetrain parts, tunes, block machining, heads and/or headwork, CAIs, etc. are what I am asking for.

-1992 Chevrolet S10 Blazer Tahoe. 2 dr, 2wd, vin 'Z' 4.3L V6, 5 speed, exhaust
-1998 Chevrolet Blazer LS. 4 dr, 2wd, vin 'W' 4.3L V6, auto, stock. Sold
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post #16 of 53 Old 12-10-2010, 09:56 PM
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Re: 4.3L performance suggestions?

Actually nitrous is budget friendly. Should have stated your list of items you wish to decline earlier.

To be honest, budget and 4.3 really aren't in the same realm. Just do the simple bolt on stuff which can be found in the sticky and call it a day.

Doesn't play well with the ignorant.
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post #17 of 53 Old 12-10-2010, 11:06 PM
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Re: 4.3L performance suggestions?

Quote:
Originally Posted by travis_r1988 View Post
To get ideas, further input, if something out of the question such as NOS is input then I will let everyone know when it comes up that it is not an option same with turbo and supercharger, they're out of the budget and not what I want, it needs to be N/A and suggestions on cams, intake manifolds, exhaust manifolds, valvetrain parts, tunes, block machining, heads and/or headwork, CAIs, etc. are what I am asking for.

which is exactly the input we were giving you

From people who have been there and done it, if you dont want the information then f*ck off.

Search, look for stickys...Hell buy a couple of fuel line magnets and tornado air inserts, I dont care. But I can tell you what does and doesnt work, and what is and isnt safe on the engine.

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post #18 of 53 Old 12-10-2010, 11:16 PM
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Re: 4.3L performance suggestions?

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Originally Posted by 1fast4by View Post
which is exactly the input we were giving you

From people who have been there and done it, if you dont want the information then f*ck off.

Search, look for stickys...Hell buy a couple of fuel line magnets and tornado air inserts, I dont care. But I can tell you what does and doesnt work, and what is and isnt safe on the engine.
dont forget the tbs
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post #19 of 53 Old 12-11-2010, 06:25 PM
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Re: 4.3L performance suggestions?

Quote:
Originally Posted by 1fast4by View Post
which is exactly the input we were giving you

From people who have been there and done it, if you dont want the information then f*ck off.

Search, look for stickys...Hell buy a couple of fuel line magnets and tornado air inserts, I dont care. But I can tell you what does and doesnt work, and what is and isnt safe on the engine.
yeah!! what he said!!^^^^ he always has good advice on performance, he's been there, done that. if you don't wanna take peoples advice who have prior experience related to what you're asking then do exactly what he said, **** off.

Brian

01 xtreme 4.3L 5spd 2/3 drop w/ SS front bumper|.030 over|270 comp cam|500 lift|dual valve springs|10:1 C/R|p&p heads w/ 3 angle valve job|w4me tune|shorty headers|2.25 y pipe|no cat|Spintech muffler|windage tray|LW flywheel|DF clutch|8mm wires|no ac|efan|walbro 255|MPFI upgrade|Comp Cam timing chain|ARP bolts/studs|totaled***
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post #20 of 53 Old 12-11-2010, 11:34 PM Thread Starter
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Re: 4.3L performance suggestions?

I figure the other forums would be more help, but thank you guys who had good input

-1992 Chevrolet S10 Blazer Tahoe. 2 dr, 2wd, vin 'Z' 4.3L V6, 5 speed, exhaust
-1998 Chevrolet Blazer LS. 4 dr, 2wd, vin 'W' 4.3L V6, auto, stock. Sold
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post #21 of 53 Old 12-12-2010, 01:40 PM
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Re: 4.3L performance suggestions?

Disturbing is right on the money. To get a 4.3 to run with any
kind of vrooom, one needs to consider the budget. Vortec heads
are better than the stock heads. A new flowing set, a nice cam,
tune, etc will help. One has to remember that the fuel tables
set in the ecm hamper any really large amount of fuel, so a
tune is req.

With a decent tune, free flowing intake and exhaust, it will
definitely run better, but one has to be careful in dumping
too much money in it. Next step would be a v-8 install which
is more cost effective since 350's are all over the place and
there are decent install kits avail.

I've never had the pleasure of driving or riding in a s10 with
a v-8, but I have seen one run where I live and if I could
get away with here in Corruptfornia and the DMV-CARB Nazi's
would let me get it smogged, it would be my first choice over
a 4.3 buildup.
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post #22 of 53 Old 12-13-2010, 09:17 PM
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Re: 4.3L performance suggestions?

not sure how you figure nitrous isnt budget friendly...

it can easily be one of the best dollar
per hp gained investments you can make.

a good used system can can easily eclipse
the gains from all the other mods combined...

BTW, you lots of good advice here.
if you go to another forum, and get similar good
advice, will move on again, until you hear only
what you want to hear?

01 Sonoma Crew Cab 4WD 4.3 auto (SOLD)
00 Sonoma Ext. Cab 4WD. 4.3 auto 3.42 Torsen diff. front axle removed. leafspring clamps (anti-hop)"W4M" tune. '06 "989" quiet cam, efans, TB UNmod, 3100 valve springs. 2.13 60ft. 9.52 @ 72.7 mph (1/8 mi.)
95 S-10 2.2. Soon to be DD

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post #23 of 53 Old 12-14-2010, 12:56 AM Thread Starter
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Re: 4.3L performance suggestions?

Quote:
Originally Posted by Crew Cab Sonoma View Post
not sure how you figure nitrous isnt budget friendly...

it can easily be one of the best dollar
per hp gained investments you can make.

a good used system can can easily eclipse
the gains from all the other mods combined...

BTW, you lots of good advice here.
if you go to another forum, and get similar good
advice, will move on again, until you hear only
what you want to hear?

I get more positive input on other forums, yes, some of the stuff said on other forums was the same there was more info purtaining to my requests, and not so much expensive or non-N/A stuff

-1992 Chevrolet S10 Blazer Tahoe. 2 dr, 2wd, vin 'Z' 4.3L V6, 5 speed, exhaust
-1998 Chevrolet Blazer LS. 4 dr, 2wd, vin 'W' 4.3L V6, auto, stock. Sold
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post #24 of 53 Old 12-14-2010, 01:22 AM
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Re: 4.3L performance suggestions?

The reason all of the suggestions here are expensive, is because they work. There is no concieveable way of making power on a budget of $1-5 per HP, except a used nitrous kit, and that doesn't usually include filling the bottle. $10 per HP is about where it starts IMHO, and on that scale, you still can't do anything for less than $200 that is effective, with some exceptions. Any other expectations are not going to be met.
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post #25 of 53 Old 12-15-2010, 01:24 AM
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Re: 4.3L performance suggestions?

Artos is right.

youre not gonna find many things for cheap that
will deliver much in meaningful performance gains.

and just remember: "positive" input doesnt always
mean your getting good advice...

01 Sonoma Crew Cab 4WD 4.3 auto (SOLD)
00 Sonoma Ext. Cab 4WD. 4.3 auto 3.42 Torsen diff. front axle removed. leafspring clamps (anti-hop)"W4M" tune. '06 "989" quiet cam, efans, TB UNmod, 3100 valve springs. 2.13 60ft. 9.52 @ 72.7 mph (1/8 mi.)
95 S-10 2.2. Soon to be DD
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post #26 of 53 Old 01-22-2011, 11:43 PM Thread Starter
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Re: 4.3L performance suggestions?

If my truck is a 92 z code with the lb4 tbi motor is it a balance shaft motor or not?

-1992 Chevrolet S10 Blazer Tahoe. 2 dr, 2wd, vin 'Z' 4.3L V6, 5 speed, exhaust
-1998 Chevrolet Blazer LS. 4 dr, 2wd, vin 'W' 4.3L V6, auto, stock. Sold
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post #27 of 53 Old 01-23-2011, 12:03 AM Thread Starter
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Re: 4.3L performance suggestions?

honestly guys, I don't see where some of your issues arose, but I apoligize if I irritated anyone, but I would like a 250-300hp, 300-350hp build naturally aspirated on pump gas just to have a lil fun until the 4.3L gives out, I downloaded the comp cams application and with brodix v6-8 heads, a 260AHR cam, small tube headers, mufflers w/cats, tbi intake with 300cfm flow, and 9.5:1 compression the program estimates 262hp and 355ft. lbs. torque, now I need to figure out pricing including tuning. Thank you guys for the help, and if you have any more input feel free to throw it up, I would love head flow numbers for lb4 and 95 heads mentioned above by disturbing v6. Then I can see what the program says about hp and tq with those heads

-1992 Chevrolet S10 Blazer Tahoe. 2 dr, 2wd, vin 'Z' 4.3L V6, 5 speed, exhaust
-1998 Chevrolet Blazer LS. 4 dr, 2wd, vin 'W' 4.3L V6, auto, stock. Sold
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post #28 of 53 Old 01-23-2011, 12:19 AM
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Re: 4.3L performance suggestions?

Im sticking with my original post. Budget will be a key, however there is a lot more to building an N/A 4.3 (especially TBI) and making power.

You keep mentioning budget, and Brodix heads...They arent budget friendly. Not even close. 96+ heads with a 2114 manifold, however, is.

The comp 260 cam, while better than stock. Leave a whole lot to be desired. you wont be happy with it. I wouldnt consider anything smaller than the 270. Mine was a custom grind based off the 270 (just larger).

On stock bottom end I was able to muster 232rwhp N/A without spray, but again, with better FI than you have and Vortec heads. Power is there to be made, but it costs money.

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post #29 of 53 Old 01-23-2011, 12:32 AM Thread Starter
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Re: 4.3L performance suggestions?

Quote:
Originally Posted by 1fast4by View Post
Im sticking with my original post. Budget will be a key, however there is a lot more to building an N/A 4.3 (especially TBI) and making power.

You keep mentioning budget, and Brodix heads...They arent budget friendly. Not even close. 96+ heads with a 2114 manifold, however, is.

The comp 260 cam, while better than stock. Leave a whole lot to be desired. you wont be happy with it. I wouldnt consider anything smaller than the 270. Mine was a custom grind based off the 270 (just larger).

On stock bottom end I was able to muster 232rwhp N/A without spray, but again, with better FI than you have and Vortec heads. Power is there to be made, but it costs money.

only place I can find the brodix heads is at their website which lists no price, but if I can get lb4s or the 95 heads mentioned by disturbing v6 flowing pretty good it'd work, again idk how accurate the program is but it says 262hp and 355ftlbs with the 260, the 270 puts it at 266hp and 336ftlbs, the 266 is at 268hp and 346ftlbs, so for best torque the 260, best hp the 266...What fi did you use? I don't mean to aggitate you, or somehow make it seem I'm ignoring you or anything, I'm just seeing one thing on the program and hearing a million different things for different people.

-1992 Chevrolet S10 Blazer Tahoe. 2 dr, 2wd, vin 'Z' 4.3L V6, 5 speed, exhaust
-1998 Chevrolet Blazer LS. 4 dr, 2wd, vin 'W' 4.3L V6, auto, stock. Sold
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post #30 of 53 Old 01-23-2011, 12:37 AM
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Re: 4.3L performance suggestions?

Well, I have been there and done that.

I wouldnt ever use or suggest the 260 cam. I also wouldnt use a TBI head. They can flow alright when ported, however the 96+ head will outflow a ported TBI head. Only difference is that you will have to change the intake manifold. The 2114 bolts right up, and with an adapter, your TBI unit will bolt right up. Makes it pretty simple. The 01+ heads got roller rockers too.

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post #31 of 53 Old 01-23-2011, 12:47 AM Thread Starter
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Re: 4.3L performance suggestions?

Quote:
Originally Posted by 1fast4by View Post
Well, I have been there and done that.

I wouldnt ever use or suggest the 260 cam. I also wouldnt use a TBI head. They can flow alright when ported, however the 96+ head will outflow a ported TBI head. Only difference is that you will have to change the intake manifold. The 2114 bolts right up, and with an adapter, your TBI unit will bolt right up. Makes it pretty simple. The 01+ heads got roller rockers too.
So i could use the vortec heads and the 2114 manifold with my tbi.
I know hp is important, but I'm looking at both hp and tq, and if the torque is higher by a few ftlbs at the expense of a couple hp thats good, my other option is a v8 ofcourse, which would have to be built up a lil ofcourse which means new tranny and rear, and collecting all the necessary swap parts, planning perfectly, and completing the swap and getting it on the road in a week or so, not much downtime will be available, so you can see why I want to do a v6 buildup. What's your opinion on the marine intake? Thank you for your input again.

-1992 Chevrolet S10 Blazer Tahoe. 2 dr, 2wd, vin 'Z' 4.3L V6, 5 speed, exhaust
-1998 Chevrolet Blazer LS. 4 dr, 2wd, vin 'W' 4.3L V6, auto, stock. Sold
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post #32 of 53 Old 01-23-2011, 12:56 AM
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Re: 4.3L performance suggestions?

the marine intake is an awesome option, however, again not very viable and budget friendly for you. Your truck is OBDI, has 2 injectors, and limited PCM compatibility. The marine intake works great for the 96+ trucks with access to a tuner though.

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post #33 of 53 Old 01-23-2011, 12:57 AM Thread Starter
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Re: 4.3L performance suggestions?

Once I figure out the options on the build...and I have my own place...I will talk to my dad as he agreed and he'll go through and help me decide the best option. Y'all probably don't know my dad, but he's a master tech who's been working on cars and building his own hot rods since he was 8 years old, and he has been there and done just about everything

-1992 Chevrolet S10 Blazer Tahoe. 2 dr, 2wd, vin 'Z' 4.3L V6, 5 speed, exhaust
-1998 Chevrolet Blazer LS. 4 dr, 2wd, vin 'W' 4.3L V6, auto, stock. Sold
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post #34 of 53 Old 01-23-2011, 12:58 AM Thread Starter
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Re: 4.3L performance suggestions?

Quote:
Originally Posted by 1fast4by View Post
the marine intake is an awesome option, however, again not very viable and budget friendly for you. Your truck is OBDI, has 2 injectors, and limited PCM compatibility. The marine intake works great for the 96+ trucks with access to a tuner though.
ah, I see so marine intake is a no go for me, thank you for clearing that up for me

-1992 Chevrolet S10 Blazer Tahoe. 2 dr, 2wd, vin 'Z' 4.3L V6, 5 speed, exhaust
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post #35 of 53 Old 01-23-2011, 01:28 AM
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Re: 4.3L performance suggestions?

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only place I can find the brodix heads is at their website which lists no price, but if I can get lb4s or the 95 heads mentioned by disturbing v6 flowing pretty good it'd work, again idk how accurate the program is but it says 262hp and 355ftlbs with the 260, the 270 puts it at 266hp and 336ftlbs, the 266 is at 268hp and 346ftlbs, so for best torque the 260, best hp the 266...What fi did you use? I don't mean to aggitate you, or somehow make it seem I'm ignoring you or anything, I'm just seeing one thing on the program and hearing a million different things for different people.
The problem with those programs is first you will never make what they say if you put it on a chassis dyno. Those programs are oriented to flywheel power.

Quote:
Originally Posted by travis_r1988 View Post
So i could use the vortec heads and the 2114 manifold with my tbi.
I know hp is important, but I'm looking at both hp and tq, and if the torque is higher by a few ftlbs at the expense of a couple hp thats good, my other option is a v8 ofcourse, which would have to be built up a lil ofcourse which means new tranny and rear, and collecting all the necessary swap parts, planning perfectly, and completing the swap and getting it on the road in a week or so, not much downtime will be available, so you can see why I want to do a v6 buildup. What's your opinion on the marine intake? Thank you for your input again.
For the marine intake your gonna need a standalone computer. There a nice setup thinking about doing it on my ZR2.

The 95 heads don't flow as good as the newer 96+ heads. I was running 13 flat all motor with them and 11.4s on a 150 shot of juice. I have since changed to the Brodix heads. They are by far not budget friendly. The heads raw cast bare as they call them are 1600 bucks. Between having to clean the living hell out of them and porting them I have right around 4Gs in them. Granted I make a little more power then I did then. With the Brodix heads I've changed my setup completely. With my setup with a Edelbrock intake killing my setup I was making 518 ponies on the bottle at the tires
As far as cam flat out get a custom cam. I ran a out the box cam once. Never have again. I went from a 13.9 truck to a 13 flat truck just by swapping cam. If your not running at least 225 degrees of duration @ 50 with comparable lift your not gonna make the power you want.

Crew Cab and joy ride have dump considerable amounts of money in there motors. I know joyride got around 6g in his motor and is happy with it. 1fast has dump tons a cash in his rig and was flying for that heavy boat. I gave up counting a long time ago. My next step is calling RPM for a Bow-Tie block and Crower for a 4.0 lift crank. There are quite a few of us on here thats done quite a lot with these motors. And a few of us nut cases that keep pushing them farther. A few of us on occasion might give you a answer you don't like but its usually to steer you in the right direction.

If you want to see what the heads look like.http://www.cardomain.com/ride/259609...10-regular-cab

1988 S-10. Built for all out drag racing. 4.3L based 309 nitrous fed power house. Holley Dominator EFI with large amounts of dry nitrous
1.46 60ft
6.4at 112 1/8mile
10.02 at 136 1/4 mile Best MPH 136
1992 S-10 silver Sunday grocery getter.
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post #36 of 53 Old 01-23-2011, 08:43 PM Thread Starter
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Re: 4.3L performance suggestions?

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The problem with those programs is first you will never make what they say if you put it on a chassis dyno. Those programs are oriented to flywheel power.



For the marine intake your gonna need a standalone computer. There a nice setup thinking about doing it on my ZR2.

The 95 heads don't flow as good as the newer 96+ heads. I was running 13 flat all motor with them and 11.4s on a 150 shot of juice. I have since changed to the Brodix heads. They are by far not budget friendly. The heads raw cast bare as they call them are 1600 bucks. Between having to clean the living hell out of them and porting them I have right around 4Gs in them. Granted I make a little more power then I did then. With the Brodix heads I've changed my setup completely. With my setup with a Edelbrock intake killing my setup I was making 518 ponies on the bottle at the tires
As far as cam flat out get a custom cam. I ran a out the box cam once. Never have again. I went from a 13.9 truck to a 13 flat truck just by swapping cam. If your not running at least 225 degrees of duration @ 50 with comparable lift your not gonna make the power you want.

Crew Cab and joy ride have dump considerable amounts of money in there motors. I know joyride got around 6g in his motor and is happy with it. 1fast has dump tons a cash in his rig and was flying for that heavy boat. I gave up counting a long time ago. My next step is calling RPM for a Bow-Tie block and Crower for a 4.0 lift crank. There are quite a few of us on here thats done quite a lot with these motors. And a few of us nut cases that keep pushing them farther. A few of us on occasion might give you a answer you don't like but its usually to steer you in the right direction.

If you want to see what the heads look like.http://www.cardomain.com/ride/259609...10-regular-cab

Would you think a 400+hp v8 would be much more cost effective to put in then? and if I get all the parts could I and some friends drop it in and tune it in a week?

-1992 Chevrolet S10 Blazer Tahoe. 2 dr, 2wd, vin 'Z' 4.3L V6, 5 speed, exhaust
-1998 Chevrolet Blazer LS. 4 dr, 2wd, vin 'W' 4.3L V6, auto, stock. Sold
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post #37 of 53 Old 01-23-2011, 09:40 PM
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Re: 4.3L performance suggestions?

Personally your best bet is to drop in a stock 350tbi motor out of a donor vehicle, it is almost a direct swap, if it is a 4x4 you will need a 4x4 oil pan. They make kits for this swap also that include motor mounts. The wire harness from the 4.3 is the exact same as the 350, you will just need to hook up the sensors and change the prom chip with the one from the donor vehicle.

After you have completed the swap and everything runs right then start to make mods and become friends with Brian at tbichips.com....350tbi motors are much easier and respond to mods much better than 4.3 motors do. I was making 280hp at the wheels with my 1988 Suburban with nothing more than a cam, vortec heads, 454tbi unit and a lot of Brians time, 280 at the wheels is about 320 at the crank. 400hp TBI motor will probably never happen...I mean it can but then you are looking at big bucks and when looking for that much power you are better off making the switch to a carb!
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post #38 of 53 Old 01-23-2011, 09:49 PM Thread Starter
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Re: 4.3L performance suggestions?

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Personally your best bet is to drop in a stock 350tbi motor out of a donor vehicle, it is almost a direct swap, if it is a 4x4 you will need a 4x4 oil pan. They make kits for this swap also that include motor mounts. The wire harness from the 4.3 is the exact same as the 350, you will just need to hook up the sensors and change the prom chip with the one from the donor vehicle.

After you have completed the swap and everything runs right then start to make mods and become friends with Brian at tbichips.com....350tbi motors are much easier and respond to mods much better than 4.3 motors do. I was making 280hp at the wheels with my 1988 Suburban with nothing more than a cam, vortec heads, 454tbi unit and a lot of Brians time, 280 at the wheels is about 320 at the crank. 400hp TBI motor will probably never happen...I mean it can but then you are looking at big bucks and when looking for that much power you are better off making the switch to a carb!
I won't run a carb, why go backwards, I'm staying with fuel injection, I mean, if it were carbed to begin with then sure why not, but its gt fuel injection why go backwards with it you know? thats just my 2 cents...I was thinking more in the lines of a 5.3L vortec engine, but the fact that the 350tbi is so easy I may do that and then plan for a 5.3L or LS1,2, or 3 engine

-1992 Chevrolet S10 Blazer Tahoe. 2 dr, 2wd, vin 'Z' 4.3L V6, 5 speed, exhaust
-1998 Chevrolet Blazer LS. 4 dr, 2wd, vin 'W' 4.3L V6, auto, stock. Sold
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post #39 of 53 Old 01-23-2011, 10:00 PM
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Re: 4.3L performance suggestions?

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I won't run a carb, why go backwards, I'm staying with fuel injection, I mean, if it were carbed to begin with then sure why not, but its gt fuel injection why go backwards with it you know? thats just my 2 cents...I was thinking more in the lines of a 5.3L vortec engine, but the fact that the 350tbi is so easy I may do that and then plan for a 5.3L or LS1,2, or 3 engine
When you start modding a TBI motor you reach a point where the TBI will no longer keep up and a carb is an upgrade so you would not be going backwards...some people including myself want to keep fuel injection hece why I built a TBI motor for my suburban because I like the cold starts in the winter, I off road a lot and get into off camber situations that would flood a carb ect...but I dont see a 400hp tbi motor happening.

I think there is a few people on 3rdgen.org that have camaros pushing 400hp or real close but look at all the money they put into it to get there. When you start moding a TBI motor 3rdgen.org is where you want to start asking a lot of questions, those guys know their sh*t on tbi motors.

If you really want a 400hp or more motor that is fuel injected I would build a real stout small block like a 383 and then get a Holley projection setup...again it wont be cheap but you might find a reasonable priced one on ebay or craigslist.

Moral to the story is 400hp = $....how fat is your wallet
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post #40 of 53 Old 01-24-2011, 06:22 PM
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Re: 4.3L performance suggestions?

Yes a 400 horses out of a 350 TBI would be much cheaper then the 4.3L. Personally I'd get a good set of flat top pistons. Kbs if you never plan to run any power adder a good set of forged like SRP or JE if you every plan to through something to it. To help keep the price down a little. Grab a set of Vortec heads either new from summit or jegs they cost about nothing. OR from the junk yard. Get the intake with adapter throw a Holley TBI on it. With a custom cam and call it the day. Get it tuned. And be happy. Thats the cheapest, gas friendliest way. Not sure how much that would make but you'd be higher then stock. That even if it wasn't 400 ponies you'd never know without dynoing it.

1988 S-10. Built for all out drag racing. 4.3L based 309 nitrous fed power house. Holley Dominator EFI with large amounts of dry nitrous
1.46 60ft
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1992 S-10 silver Sunday grocery getter.
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post #41 of 53 Old 01-25-2011, 04:35 PM Thread Starter
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Re: 4.3L performance suggestions?

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Yes a 400 horses out of a 350 TBI would be much cheaper then the 4.3L. Personally I'd get a good set of flat top pistons. Kbs if you never plan to run any power adder a good set of forged like SRP or JE if you every plan to through something to it. To help keep the price down a little. Grab a set of Vortec heads either new from summit or jegs they cost about nothing. OR from the junk yard. Get the intake with adapter throw a Holley TBI on it. With a custom cam and call it the day. Get it tuned. And be happy. Thats the cheapest, gas friendliest way. Not sure how much that would make but you'd be higher then stock. That even if it wasn't 400 ponies you'd never know without dynoing it.

That sounds great...not planning on forced induction so shouldn't need to worry about that so it should be relatively cheap. thank you for the input.

-1992 Chevrolet S10 Blazer Tahoe. 2 dr, 2wd, vin 'Z' 4.3L V6, 5 speed, exhaust
-1998 Chevrolet Blazer LS. 4 dr, 2wd, vin 'W' 4.3L V6, auto, stock. Sold
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post #42 of 53 Old 05-15-2011, 08:39 PM Thread Starter
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Re: 4.3L performance suggestions?

would these be a good idea for moderate performance gains, a v8 would be best but gotta wait a few years. so would these be good?

http://www.gmpartsdirect.com/perform...CATID=304.html
http://www.summitracing.com/parts/EDL-3713/
http://www.summitracing.com/parts/HED-69410/

with new valvesprings, rockers, pushrods, lifters, timing chain, gaskets, and y-pipe

-1992 Chevrolet S10 Blazer Tahoe. 2 dr, 2wd, vin 'Z' 4.3L V6, 5 speed, exhaust
-1998 Chevrolet Blazer LS. 4 dr, 2wd, vin 'W' 4.3L V6, auto, stock. Sold
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post #43 of 53 Old 05-17-2011, 12:41 AM
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Re: 4.3L performance suggestions?

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Crew Cab and joy ride have dump considerable amounts of money in there motors. I know joyride got around 6g in his motor and is happy with it. 1fast has dump tons a cash in his rig and was flying for that heavy boat.
heh, never saw this til now...
actually, 'Ole Crew Cab is a cheap SOB these days, and only
has about several hundred dollars in engine and drivetrain mods.
here are my most expensive mods to date:

camshaft swap:
about $280 total invested, including a used Crane cam,
new timing set, gaskets and sealants, ect.

02 intake manifold swap:
about $90 total. including gaskets...

"Wait4Me" tuned PCM:
~$190 invested, including having the CKP re-learn done...
i figure this one has already paid for itself in fuel savings...

Torsen differental:
aprox. $150 invested, including used carrier, new carrier
bearing races, and a carrier shim kit, to adjust backlash.

efans:
~$110. total. bought the fans new, including adj. fan switch,
and two relays.
these have probably paid for themselves in fuel savings as well,
over the 7+ years i've had them. they were originally installed
on my old Crew Cab...

LS1 valvesprings & "787" retainers:
about $50 invested... for the retainers...
the springs were given to me...

underdrive pulleys:
~$60, including new belt. i got the pulley set from
a friend, who bought them new, then decided to sell his
truck before he got around to installing them...
still not sure they were worth it though...

those are my most expensive mods thus far...
several other cheap mods, and lots of labor and time
into weight reductions, but not alot of money in it...

01 Sonoma Crew Cab 4WD 4.3 auto (SOLD)
00 Sonoma Ext. Cab 4WD. 4.3 auto 3.42 Torsen diff. front axle removed. leafspring clamps (anti-hop)"W4M" tune. '06 "989" quiet cam, efans, TB UNmod, 3100 valve springs. 2.13 60ft. 9.52 @ 72.7 mph (1/8 mi.)
95 S-10 2.2. Soon to be DD
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post #44 of 53 Old 05-17-2011, 02:55 AM
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Re: 4.3L performance suggestions?

Travis,

You and I are kind of on the same wavelength...build a modified V6 for more HP and TQ which runs on pump gas and retains the TBI. Because of handling/traction considerations and electrical reconfigurations, I decided to not go the V8 route. Most of the information on what to build and which combination of parts to use, I have gleaned from this and several other online sites.

I have '92 ext cab 4x4 with 186K+ miles. Last year, I bought another VIN Z motor for $100. The plan is to build the motor as funds permit and install upon completion.

So far, here's what costs are:
Motor bored .020"--hypereutetic flat top pistons; machine shop work, main & con rod bearings, rings, etc. - $1300
'96+ vortec heads - $150
Roller rockers - $90
Elgin Marine Cam - $325
Roller hydraulics lifters - $85
Edelbrock 2114 intake - $275
TBI-to-carb adapter - $90
Timing chain & gears - $75
Head work-multi-face valve job - $375
Chrome valve covers - $55
Oil pump - $45
Headman Headers - $210

In hindsight, I should have set a budget...it has not been cheap!!! But, I don't know if that would have made a big difference. As many others have said, parts and machine work for getting HP and TQ out of a V6 simply cost bucks. Just think...a 300HP V6 means getting over 1 HP per cubic inch...that's a tough benchmark.

As for the parts you listed, in my build, I'm using the marine cam and Hedman headers. The Performer intake is for non-vortec head motors and won't fit if you install vortec heads.

Last edited by 57 Handyman; 05-17-2011 at 03:03 AM. Reason: clarification
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post #45 of 53 Old 05-17-2011, 07:10 PM
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Re: 4.3L performance suggestions?

Love this forum lots of info but you guys have lost me on some stuff!

ive got a 2002 ext cab with a 4.3L and its standard.
some of the mods i was thinking about doing are a CAI, the throttle body hood, straigh pipe exhaust, and the wait 4 me tune. im also on a tighter budget but dont mind pulling a little extra outta the savings to get this work done, other than these mods what else can i toss on or do to this 02 4.3L to giver a little more pep in her step and help burn a little more rubber?
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post #46 of 53 Old 06-05-2011, 11:02 PM Thread Starter
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Re: 4.3L performance suggestions?

Okay, so i'm thinking about doing this: A rebuilt LB4 short block with 4-bolt mains, 9.5:1 pistons, forged rods, new crank, 1996+ true vortec heads, beehive valvesprings, hardened pushrods, new lifters and rockers, comp cams 270ahr, msd ignition system, edelbrock dualplane manifold with tbi adapter or tbi manifold for vortec heads, spectre modular cold air intake, new timing chain and cover, new valve covers, felpro gaskets, arp bolts, high flow fuel pump, bigger injectors, long tube headers through a custom y-pipe, high flow cat and muffler (single in dual out), beefed up t-5 trans, trac-bars in rear with P275/60R15 BFGs out back and P235/70R15 BFGs up front.

Desktop dyno spits out 321hp at 5500rpm 323lbs. ft. at 4500rpm with just the cam, vortec heads, 9.5:1 compression, dual plane manifold and small tube headers. 329hp at 5500rpm and 331lbs.ft. at 4500rpm with single plane-std flow. 330hp at 5500rpm and 334lbs.ft. at 4500rpm with single plane-high flow. 320hp at 5500rpm and 332lbs.ft. at 4000rpm with SFI (found on newer 4.3L-updated spider that injects sequentially instead of simultaneously like previous versions).

Sound good?

-1992 Chevrolet S10 Blazer Tahoe. 2 dr, 2wd, vin 'Z' 4.3L V6, 5 speed, exhaust
-1998 Chevrolet Blazer LS. 4 dr, 2wd, vin 'W' 4.3L V6, auto, stock. Sold
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post #47 of 53 Old 06-07-2011, 05:22 PM
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Re: 4.3L performance suggestions?

I had an LT1 5.7L V8 Caprice that put out 265hp/330 ft-lbs stock. When hammer-time came around, it shredded! My point is that you're not going to beat that motor with a warmed over 4.3. You might have a chance with a super-charger, but that's big cash money (more than buying an S10 with a V8 already in it).

Your dreams of a budget 4.3L pushing 300HP are lovely, but reality is going to hit you hard in your wallet if you try it.

I really think the cheapest route is to look around on Craigslist for someone who already dropped an 8 into their dime and buy it after you've sold your Blazer (because then you'll know how much cash you're working with). The 4.3 is a decent motor for what it is, but trying to get power out of it will give you serious wallet-aches.

Here's what I mean:
http://chicago.craigslist.org/nwc/cto/2415853760.html

If you had time and money and just felt like doing it, I'd say go for it, but you seem to care about your dollars, so don't go wasting them.
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post #48 of 53 Old 06-07-2011, 06:23 PM Thread Starter
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Re: 4.3L performance suggestions?

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I had an LT1 5.7L V8 Caprice that put out 265hp/330 ft-lbs stock. When hammer-time came around, it shredded! My point is that you're not going to beat that motor with a warmed over 4.3. You might have a chance with a super-charger, but that's big cash money (more than buying an S10 with a V8 already in it).

Your dreams of a budget 4.3L pushing 300HP are lovely, but reality is going to hit you hard in your wallet if you try it.

I really think the cheapest route is to look around on Craigslist for someone who already dropped an 8 into their dime and buy it after you've sold your Blazer (because then you'll know how much cash you're working with). The 4.3 is a decent motor for what it is, but trying to get power out of it will give you serious wallet-aches.

Here's what I mean:
http://chicago.craigslist.org/nwc/cto/2415853760.html

If you had time and money and just felt like doing it, I'd say go for it, but you seem to care about your dollars, so don't go wasting them.


I will never buy an s10 that someone else has dropped a v8 in, I just couldn't trust their work, if a v8 is going in it'll be by me, my dad, or my brother. As for the v6 build 300hp is 300hp, but the v6 is lighter, so how would a 265hp/330ft.lbs. v8 be more powerful than a 330hp/334ft.lbs. v6? and that build is around $5k, a LS v8 swap done correctly is about the same, I just think the v6 would be different and turn more heads, but ultimately a LS v8 is my goal, the v6 is pipedreams, unless I find the parts really cheap.

-1992 Chevrolet S10 Blazer Tahoe. 2 dr, 2wd, vin 'Z' 4.3L V6, 5 speed, exhaust
-1998 Chevrolet Blazer LS. 4 dr, 2wd, vin 'W' 4.3L V6, auto, stock. Sold
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post #49 of 53 Old 06-07-2011, 07:54 PM
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Re: 4.3L performance suggestions?

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Originally Posted by travis_r1988 View Post
I will never buy an s10 that someone else has dropped a v8 in, I just couldn't trust their work, if a v8 is going in it'll be by me, my dad, or my brother. As for the v6 build 300hp is 300hp, but the v6 is lighter, so how would a 265hp/330ft.lbs. v8 be more powerful than a 330hp/334ft.lbs. v6? and that build is around $5k, a LS v8 swap done correctly is about the same, I just think the v6 would be different and turn more heads, but ultimately a LS v8 is my goal, the v6 is pipedreams, unless I find the parts really cheap.
How the hell do you figure a LS swap would be 5K, you can get LS motors all day long with wire harness and computer for under $1500...you going to pay someone $3500 to do the swap for you?
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post #50 of 53 Old 06-08-2011, 12:05 AM
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Re: 4.3L performance suggestions?

Quote:
Originally Posted by ala_frosty View Post
I had an LT1 5.7L V8 Caprice that put out 265hp/330 ft-lbs stock. When hammer-time came around, it shredded! My point is that you're not going to beat that motor with a warmed over 4.3. You might have a chance with a super-charger, but that's big cash money (more than buying an S10 with a V8 already in it).

Your dreams of a budget 4.3L pushing 300HP are lovely, but reality is going to hit you hard in your wallet if you try it.

I could tell you how many ways you are wrong, But that would make me tired. My last 4.3 would mop LTanything without spray, or boost...

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