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W and X Engine Code 4.3's? Whats the difference in these two?

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Old 05-11-2005, 01:39 AM   #1
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W and X Engine Code 4.3's? Whats the difference in these two?

I see in my year (1997) there are two different 4.3 engine codes. One or the other has I think, has 10 more factory horse power. Is one engine just for a 4X4? Or just a different application?

How do they get the EXTRA Horse Power?

Mine is the X code, is it the lower of the two?

What are the Horse Power Ratings for Each?



THANKS for any Help Or Info!

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Old 05-11-2005, 01:59 AM   #2
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Re: W and X Engine Code 4.3's? Whats the difference in these two?

holy shiiit not this again. The X-vin has ~10 hp less than W-vin which is rated at ~190 hp. I belive the difference is by computer tune.
Old 05-11-2005, 06:05 AM   #3
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Re: W and X Engine Code 4.3's? Whats the difference in these two?

Quote: Originally Posted by nystateofmind27
holy shiiit not this again. The X-vin has ~10 hp less than W-vin which is rated at ~190 hp. I belive the difference is by computer tune.

Computer programming and slightly bigger Cam
Old 05-11-2005, 11:39 AM   #4
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Re: W and X Engine Code 4.3's? Whats the difference in these two?

OK! I would have thought Cam.

BUT? What were the High Out Put Engines put in? I would figure 4X4's but not really sure? It would seem you'd need the Extra H.P. to push the extra weight and of course for the extra pulling power?

I would also wonder about the Tourqe difference in the two? I have seen the H.P. ratings before, but NEVER the Tourqe Ratings?

What years did they offer the two Engine Codes?

And, what are the H.P. ratings of say a 2002-2004 4.3?


THANKS!
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Old 05-11-2005, 04:59 PM   #5
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Re: W and X Engine Code 4.3's? Whats the difference in these two?

There is only one engine in the 2002-2004 trucks if i am not mistaken. 180-190ish horsepower, and 245ft-lbs of torque or so. The 96 up x and w engines are essensialy the same, like 10 hp really matters.
Old 05-11-2005, 05:14 PM   #6
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Re: W and X Engine Code 4.3's? Whats the difference in these two?

Quote: Originally Posted by rat
There is only one engine in the 2002-2004 trucks if i am not mistaken. 180-190ish horsepower, and 245ft-lbs of torque or so. The 96 up x and w engines are essensialy the same, like 10 hp really matters.

Yeah! 10 H.P. does matter when your only talking 180-190 H.P. Do you realize what it costs to make ten true rear wheel horse power? Not just using a bogous Air System that really looses more than it makes or 3-5 H.P. gain from a High Dollar Cat Back Muffler System? Or spending $399 on a Computer Controller that really only makes only 10-15 (maybe) H.P. and they say it MIGHT MAKE 30?

So yeah! 10 H.P. added to a !80 H.P. Engine is a Big Deal!
Old 05-11-2005, 05:24 PM   #7
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Re: W and X Engine Code 4.3's? Whats the difference in these two?

96+ X-175hp, W-180hp, 4X4 W-190hp. Then i think all the new ones are X code which are 180hp again and 190 in 4X4
Old 05-11-2005, 06:19 PM   #8
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Re: W and X Engine Code 4.3's? Whats the difference in these two?

the 4.3 w code with Central Port Injection also supposedly have 195hp and 260ft/lb . these came in some 4x4's and the 94-95 ss's along with s10s with the L35 rpo right?
Old 05-11-2005, 07:05 PM   #9
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Re: W and X Engine Code 4.3's? Whats the difference in these two?

my 2001 extreme has the bigger motor so its not just the 4X4's
Old 05-11-2005, 11:39 PM   #10
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Re: W and X Engine Code 4.3's? Whats the difference in these two?

your 2001 x shouldn't have the cpi motor...but it may have the 190 hp rating. i'm not 100% sure on that.
Old 05-11-2005, 11:40 PM   #11
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Re: W and X Engine Code 4.3's? Whats the difference in these two?

search....
Old 05-12-2005, 01:19 AM   #12
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Re: W and X Engine Code 4.3's? Whats the difference in these two?

Quote: Originally Posted by RKs95BlackSS
the 4.3 w code with Central Port Injection also supposedly have 195hp and 260ft/lb . these came in some 4x4's and the 94-95 ss's along with s10s with the L35 rpo right?


i dont think any of them had 195




w code is 190
Old 05-12-2005, 03:00 AM   #13
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Re: W and X Engine Code 4.3's? Whats the difference in these two?

not S-series, but the full size trucks and vans (99-00-up models, i believe) were rated at 195 hp/260 tq... probably due to the dual cat exhaust system, and possibly the larger air cleaners on them.

Last edited by Crew Cab Sonoma; 05-12-2005 at 03:02 AM.
Old 05-12-2005, 10:07 AM   #14
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Re: W and X Engine Code 4.3's? Whats the difference in these two?

Quote: Originally Posted by 98 step side
my 2001 extreme has the bigger motor so its not just the 4X4's
No you dont, you have 180hp first of all

Quote: Originally Posted by RKs95BlackSS
your 2001 x shouldn't have the cpi motor...but it may have the 190 hp rating. i'm not 100% sure on that.
It doesn't, those stopped in 1995

Quote: Originally Posted by blaz1n
i dont think any of them had 195

w code is 190
Yes 94-95 had the 195hp CPI engine. W Code is infact 180hp and the 4X4 W codes (such as my dads old 2000 zr2) is rated at 190hp. NO 2WD W code motor is 190hp
Old 05-12-2005, 10:13 AM   #15
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Re: W and X Engine Code 4.3's? Whats the difference in these two?

2001 are 190 hp as they added the roller rockers etc as all 2002-up are 190 hp even when the 2003-2004 have a x vin they are still 190hp

and it has nothing to do with 2wd or 4wd most all blazers are w code in 2wd v6 trucks depneds on the package i had a loaded 99 xtreme v6 auto step side all power and a x motor

Last edited by s10warehouse; 05-12-2005 at 10:14 AM.
Old 05-12-2005, 01:50 PM   #16
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Re: W and X Engine Code 4.3's? Whats the difference in these two?

Plain and simple...

180 HP - 245 Torque (2WD) -190 HP - 250 Torque (4WD) 4.3L V6 CSFI
Old 05-12-2005, 02:06 PM   #17
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Re: W and X Engine Code 4.3's? Whats the difference in these two?

i have 190 hp and im 2wd
Old 05-12-2005, 04:41 PM   #18
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Re: W and X Engine Code 4.3's? Whats the difference in these two?

Quote: Originally Posted by s10warehouse
2001 are 190 hp as they added the roller rockers etc as all 2002-up are 190 hp even when the 2003-2004 have a x vin they are still 190hp

and it has nothing to do with 2wd or 4wd most all blazers are w code in 2wd v6 trucks depneds on the package i had a loaded 99 xtreme v6 auto step side all power and a x motor
They changed in 2000, not 2001, that isn't the difference that makes the extra 10hp.
Old 05-13-2005, 12:23 PM   #19
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Re: W and X Engine Code 4.3's? Whats the difference in these two?

Hey keep in mind all the ratings on the engines are at the fly wheel. Not to the wheels. You gotta factor in the differences in the gear ratios also. I thought I'd throw that in there.
Old 05-13-2005, 12:49 PM   #20
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Re: W and X Engine Code 4.3's? Whats the difference in these two?

very true, rear end and transmissions, etc... posi's. make a huge difference. on the other hand i think we're talking about the engines themselves. that is what gives you hp.
Old 05-13-2005, 02:16 PM   #21
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Re: W and X Engine Code 4.3's? Whats the difference in these two?

Quote: Originally Posted by blaz1n
i have 190 hp and im 2wd
so sure about that? How can you prove that?
Old 05-13-2005, 02:21 PM   #22
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Re: W and X Engine Code 4.3's? Whats the difference in these two?


96+...
x = 175hp 245 tq
w= 180hp 250 tq
4x4 and blazer w = 190 hp 260tq (due to larger y pipe)
Old 05-13-2005, 02:24 PM   #23
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Re: W and X Engine Code 4.3's? Whats the difference in these two?

anyone who has run either stock in the 1/4 mile, what was your time?
i have a W and did 15.9 stock
Old 05-13-2005, 02:39 PM   #24
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Re: W and X Engine Code 4.3's? Whats the difference in these two?

Haha I love when this thread comes up every few months, Vin x is 175hp 96+ until they got rid of the W code motor alltogether, at that point Vin X meant 190hp across the board as far as s10's are concerned. Vin W 180hp in 2wd trucks, I believe blazer/jimmy Vin W 4.3's were always rated at 190hp, as were 4x4 Vin W pickups.
Old 05-13-2005, 06:09 PM   #25
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Re: W and X Engine Code 4.3's? Whats the difference in these two?

I've seen tons of these threads, why don't they just make the most informative one sticky?
Old 05-14-2005, 01:08 AM   #26
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Re: W and X Engine Code 4.3's? Whats the difference in these two?

Quote: Originally Posted by BadaSS_Black97
anyone who has run either stock in the 1/4 mile, what was your time?
i have a W and did 15.9 stock
15.7
Old 05-14-2005, 02:39 PM   #27
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Re: W and X Engine Code 4.3's? Whats the difference in these two?

My 95 GMC Jimmy is rated for 195 HP and 260 FT LB torque. its on the window sticker which I still have. its a CPI motor
Rob
Old 05-14-2005, 04:24 PM   #28
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Re: W and X Engine Code 4.3's? Whats the difference in these two?

Quote: Originally Posted by Rob454
My 95 GMC Jimmy is rated for 195 HP and 260 FT LB torque. its on the window sticker which I still have. its a CPI motor
Rob
Correct, CPI's were rated at that
Old 05-16-2005, 10:26 AM   #29
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Re: W and X Engine Code 4.3's? Whats the difference in these two?

I have an 02 2wd blazer and went 15.7 bouncing off the speed limiter the last time I went without the nitrous....I hit it 2 times before I went across the line......I have a w motor
Old 05-16-2005, 11:06 AM   #30
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Re: W and X Engine Code 4.3's? Whats the difference in these two?

thats good for the motor...
Old 05-16-2005, 04:13 PM   #31
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Re: W and X Engine Code 4.3's? Whats the difference in these two?

uh, what are you supposed to do.....let off and get a shittier time??? I don't have a hypercrap or programmer yet.....the point of that post was that it can definitely go faster than 98 through the 1/4
Old 05-16-2005, 04:19 PM   #32
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Re: W and X Engine Code 4.3's? Whats the difference in these two?

Quote: Originally Posted by HotToyz
Yeah! 10 H.P. does matter when your only talking 180-190 H.P. Do you realize what it costs to make ten true rear wheel horse power? Not just using a bogous Air System that really looses more than it makes or 3-5 H.P. gain from a High Dollar Cat Back Muffler System? Or spending $399 on a Computer Controller that really only makes only 10-15 (maybe) H.P. and they say it MIGHT MAKE 30?

So yeah! 10 H.P. added to a !80 H.P. Engine is a Big Deal!
Hate to tell ya man, but your truck isn't putting out 180 OR 190 HP to the wheels. Manufacturers don't measure wheel HP, they measure crank HP, it makes them look better. No matter which engine you have, you're lucky if you're getting 150 HP to the wheels!

Sorry to rain on your parade!

Last edited by rattmobbins; 05-16-2005 at 04:21 PM.
Old 05-16-2005, 07:14 PM   #33
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Re: W and X Engine Code 4.3's? Whats the difference in these two?

im pretty sure he and we all know that he is talking about fly rated hp?
Old 05-16-2005, 08:07 PM   #34
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Re: W and X Engine Code 4.3's? Whats the difference in these two?

Quote: Originally Posted by jmwxtreme43
No you dont, you have 180hp first of all



It doesn't, those stopped in 1995



Yes 94-95 had the 195hp CPI engine. W Code is infact 180hp and the 4X4 W codes (such as my dads old 2000 zr2) is rated at 190hp. NO 2WD W code motor is 190hp
1994 W code had 195hp 260 torque, 1995 W code had 191hp 260 torque.
Old 05-16-2005, 09:15 PM   #35
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Re: W and X Engine Code 4.3's? Whats the difference in these two?

Quote: Originally Posted by jmwxtreme43
im pretty sure he and we all know that he is talking about fly rated hp?
I don't know, he asked if we knew how hard it was to make "ten true rear wheel HP", so I don't think he does.
Old 05-16-2005, 09:51 PM   #36
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Re: W and X Engine Code 4.3's? Whats the difference in these two?

yah werd.....and both engines put out damn near the same when put on a dyno :shrugs: 02 was about the best year to get due to it not having egr and 99% of them being the good motor
Old 05-16-2005, 11:52 PM   #37
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Re: W and X Engine Code 4.3's? Whats the difference in these two?

either way, put all 3 of them in your truck stock for stock and you'd never know the difference, only way to really tell is with dyno sheets
Old 05-17-2005, 12:35 AM   #38
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Re: W and X Engine Code 4.3's? Whats the difference in these two?

cpi does make a diff, but basically yeah.....
Old 05-17-2005, 06:59 AM   #39
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Re: W and X Engine Code 4.3's? Whats the difference in these two?

Quote: Originally Posted by SummerWolf
yah werd.....and both engines put out damn near the same when put on a dyno :shrugs: 02 was about the best year to get due to it not having egr and 99% of them being the good motor
2002-2005 still has an EGR, but it's internal...
Old 05-17-2005, 08:15 AM   #40
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Re: W and X Engine Code 4.3's? Whats the difference in these two?

Quote: Originally Posted by SummerWolf
I have an 02 2wd blazer and went 15.7 bouncing off the speed limiter the last time I went without the nitrous....I hit it 2 times before I went across the line......I have a w motor
No you didn't, if so you were running 15.7@97mph? I don't think so.
Old 05-17-2005, 09:31 AM   #41
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Re: W and X Engine Code 4.3's? Whats the difference in these two?

Quote: Originally Posted by MINTSICK
No you didn't, if so you were running 15.7@97mph? I don't think so.
Yeah not even close, concidering he stated before somewhere that he trapped at 84mph off the bottle.
Old 05-17-2005, 07:38 PM   #42
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Re: W and X Engine Code 4.3's? Whats the difference in these two?

now here is a good question...
when you look up parts on the GM parts computer at the dealership (like I did when I worked there)
why are all the parts the same for the 2wd and 4wd 4.3s for say... my 2003 zq8?
If Im not mistaken, the crate motor was the same GM part # too.
So where is this misplaced 10hp in my truck?
Old 05-17-2005, 11:58 PM   #43
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Re: W and X Engine Code 4.3's? Whats the difference in these two?

uh yeah I have the w motor in a 2wd blazer.....thanks....I know my vin number
Old 05-18-2005, 12:00 AM   #44
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Re: W and X Engine Code 4.3's? Whats the difference in these two?

my speed limiter hits 98 on the cluster 92 at the track.....the 15.7 I ran on the bottle was recent when I hit that trap speed.....the 15.7 I have in my sig was the first time at the track with an intake exhaust and tbs but no pulleys and I hit that at 84..... I got a shitty 60 ft (2.3) on the bottle when I got the 15.7 @ 92 and only 600 psi of bottle pressure....I still hit the speed limiter at the end of the track though, my blazer is a w motor

Last edited by SummerWolf; 05-18-2005 at 12:29 AM.
Old 05-18-2005, 09:54 AM   #45
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Re: W and X Engine Code 4.3's? Whats the difference in these two?

might want to get that speedo fixed then, no clue how you ran a 15.7@98 or even 92, thats 14 second material time and that 60' is nothing bad at all to get that time.
Old 05-18-2005, 08:00 PM   #46
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Re: W and X Engine Code 4.3's? Whats the difference in these two?

Quote: Originally Posted by SummerWolf
my speed limiter hits 98 on the cluster 92 at the track.....the 15.7 I ran on the bottle was recent when I hit that trap speed.....the 15.7 I have in my sig was the first time at the track with an intake exhaust and tbs but no pulleys and I hit that at 84..... I got a shitty 60 ft (2.3) on the bottle when I got the 15.7 @ 92 and only 600 psi of bottle pressure....I still hit the speed limiter at the end of the track though, my blazer is a w motor
I may be compleatly wrong on this, but i thought that at the track they don't actualy measure your top speed, it is figured out by using the time between the finish beam, and the beam before the finish beam, so the actual speed would always be higher than the speed that the track computer figures out for you.
Old 05-18-2005, 09:11 PM   #47
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Re: W and X Engine Code 4.3's? Whats the difference in these two?

they dont measure top speed. They measure the 1/8th and 1/4 speed
Old 05-19-2005, 09:42 AM   #48
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Re: W and X Engine Code 4.3's? Whats the difference in these two?

Quote: Originally Posted by jmwxtreme43
they dont measure top speed. They measure the 1/8th and 1/4 speed
I think rat meant top speed as you cross the finish line, but yeah they take an average and thats how the mph is computed.
Old 05-19-2005, 12:48 PM   #49
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Re: W and X Engine Code 4.3's? Whats the difference in these two?

it was my understanding that the ZR2 and Extreme models had the High Output engines. The full size with the same motor achieved better hp due to a larger diameter exhaust... better breathing
Old 08-01-2005, 02:08 PM   #50
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Re: W and X Engine Code 4.3's? Whats the difference in these two?

the cpi motor was a Z code. it had close to 200 horse.
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