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post #1 of 24 Old 03-29-2011, 10:57 PM Thread Starter
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3.4 dohc

Has anyone ever tried putting one of these into their dimes? im thinking about buying a 95 monte carlo that has this engine in it was wondering if it's possible.





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post #2 of 24 Old 03-29-2011, 11:50 PM
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Re: 3.4 dohc

the 95 monte carlo is FF IIRC with the LQ1 engine. Unless you want to convert your truck to front wheel drive haha then no.

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post #3 of 24 Old 03-30-2011, 12:24 AM
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Re: 3.4 dohc

very doable.

there is going to be a lot of fab work for you to do ... or pay someone to do for you.

starting with getting a bell housing that has the starter on the correct side. if you go auto the 700r4 dose not matter.
If you are using a t5 then you need an 84 or older bell housing to accept the driver side starter.

then you need a good set of drill bits and a tap. Your choice of using oe design mounts or welding your own up. The bosses are on the block but will not be drilled. once you attach the mounts you will need to check your placement but should be in good shape.

swing it over the frame and then see how much of the cross member you will need to trim. should be about an inch wider than your oil pan and about an inch and a half deep starting from the back.

the next thing to watch out for is the headers, which will be custom. should be able to get flanges from HERE I would say make a mid length with 3 into one at the bottom flange.

as long as you use the computer from the monty you will only have mild mods to do to the wire harness. OR you could use a fast or other diy FI system. lots of options.

good luck!

take lots of pics and when you get pissed walk away and go back with a clear head.

b

just a link to a thread about a 3.4L dohc with over 500hp at the crank 430 dynoed at the rear wheels! nice!!! DOHC
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post #4 of 24 Old 03-30-2011, 10:04 AM
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Re: 3.4 dohc

Sahweet. He made over 350 torque from 3700-onward.


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post #5 of 24 Old 03-30-2011, 03:12 PM
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Re: 3.4 dohc

There was a guy selling GM crate DOHC 3.4 (long block) for 750 each. I came real close to buying one. I have a set of Porsche Webers from a 911 that I was going to make manifolds for and the the ignition would be a little trickier cause no ECU to control the cam and crank sensors. I looked into stand alone ignition, it can be done. Headers and mounts would be no big problem, just time consuming. Polish the aluminum valve covers and you would have an exotic looking power plant...
I have so many damn projects now, I just couldn't hang it.

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post #6 of 24 Old 03-30-2011, 03:55 PM
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Re: 3.4 dohc

if its a huge project i would just go v8. even though the 3400 does have very good power (like 210 or something).

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post #7 of 24 Old 03-30-2011, 06:07 PM
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Re: 3.4 dohc

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Originally Posted by s10Lifer View Post
take lots of pics and when you get pissed walk away and go back with a clear head.
Yep...and stop when you are tired. That's when you can make big (and expensive) mistakes. Trust me..



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My build thread (3.4L)https://www.s10forum.com/forum/f106/...stions-427168/
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post #8 of 24 Old 03-30-2011, 07:39 PM
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Re: 3.4 dohc

don't be cheap either : ). Being cheap is allright if you just need a engine to get by on or don't demand anything of it. I wonder what the potential of the 3.4L with a turbo is (insert dream).

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post #9 of 24 Old 03-30-2011, 08:52 PM Thread Starter
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Re: 3.4 dohc

750 for a long block? thats not bad price at all.
but if got the whole car i could just swap out the wire harness ecu i'll have to rewire my fuse box but that's not too bad, the fabricating is where it's gonna be time consuming the pia part is going to be fabricating the transmission bellhousing. i mean i could just cut a chunk out of it so the starter will fit, that or i tap the block on the passenger side. the easy part is finding a flywheel out of an 88-93 2.8.
if i decide to go through with this i'll post more on it.




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post #10 of 24 Old 03-30-2011, 10:13 PM
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Re: 3.4 dohc

honestly for the time i would just do a v8. I know i preach against v8's most the time but in this case they will probably take the same time if not more on either one; you'd have to ask the v8 guys. the v8 has ALOT more power potential. One guy bought a used ls2 or ls1 for like 1500 out of a van. a 3400 is mega different though but idk if difference is worth the time and money.

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post #11 of 24 Old 03-30-2011, 11:44 PM Thread Starter
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Re: 3.4 dohc

i can't make up my mind what im gonna do lol thinkin strokin out the 2.8 to a 3.1 or getting a short block 3.1 or 3.4 and putting my intake and carb on it. decisions decisions. i was orginally gonna put a 305ci and a 78 or older 350 3 speed in it but i've heard horror stories from some people that have done this the thing that scared me the most was going 55 mph and stomping in to it and the rearend going side ways on me, i dont know aout alot of people but i don't have a death wish. And another one which is more annoying than anything he said when he was at a stop the back tires would still turn and that's with 255/65 r15s.




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post #12 of 24 Old 03-31-2011, 02:27 AM
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Re: 3.4 dohc

hmmm just do the 3.4L camaro engine then; i've heard its just as powerful as the 4.3L and some of the v8 swaps which isn't suprising. As engines get newer power per Ci goes up by alot. I'm just sayin you got alot of fab work with the 3400 and quite a bit of fab work with the v8; which one has more idk. When its wet out i've had the rearend in my 2.8L go sideways on me haha. With these trucks with almost any power that rearend is gonna slide. I can barely let it out of first when its wet out w/o wheels spinning (sucks in traffic jams with wet roads haha).

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post #13 of 24 Old 03-31-2011, 08:54 AM
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Re: 3.4 dohc

I guess you have to set your priorities. Gas mileage, drag racing, street racing, daily driving, sport driving. The cheapest way to power is a stock 350 SB in a dime. You control the rear end in this case. Your right foot is in command - powered by your brain (hopefully).
There is no sustitution for cubic inches. If you are going for gas mileage, small is best.
Back to the DOHC. It would make good power, but it will take some seeeerious modifications and fabricating. The main reason I was thnking of doing this swap is the uniqueness of this engine. Polished and done up it would be wild looking. Especially with a set of Weber carbs on top.

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1)'82 S10, 383, 700R4, Shorty
2) '85 S10, 3.4, 700R4 4x4 stretch cab (Redneck)
3) '90 S10 2.5, 5 speed shorty
4) '91 S10, Built 3.4, 5 speed shorty (Voodoo)
5) '92 S10, 2.5, 5 speed shorty, (Barbie)
6) '92 S10, 2.5 5 speed, Shorty
7) 1979 LUV, Buick 3.8 V6, TH 350 Shorty.
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post #14 of 24 Old 03-31-2011, 11:24 AM
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Re: 3.4 dohc

the cheapest way to a whole lot of power and potential is a 350 SB but the cheapest way to respectable power is a 3.4 haha. If you got a nice ride i don't think you should tear it apart to drop a engine in IMO. Don't forget you can always go with forced induction if you want more power but don't wanna tear apart the truck.

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post #15 of 24 Old 03-31-2011, 08:29 PM
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Re: 3.4 dohc

It would be exotic, it would turn heads, but over head cam?? Sure you'll be pumpin more ponies than my 3.4 OHV... but if you are looking to make a legit fast truck... I'd look at adding 143ci and two more cylinders to that 207ci 3.4

...But hey, I think a OHC 3400 in a dime would be neat..

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post #16 of 24 Old 04-02-2011, 09:23 PM
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Re: 3.4 dohc

Ever seen a pic of one? I didn't think so. If you're looking for something WAY different- you've hit the onion. That is my interest in this project , never done before (?)- too bad I just don't have the time. BOO

S10 addiction:
1)'82 S10, 383, 700R4, Shorty
2) '85 S10, 3.4, 700R4 4x4 stretch cab (Redneck)
3) '90 S10 2.5, 5 speed shorty
4) '91 S10, Built 3.4, 5 speed shorty (Voodoo)
5) '92 S10, 2.5, 5 speed shorty, (Barbie)
6) '92 S10, 2.5 5 speed, Shorty
7) 1979 LUV, Buick 3.8 V6, TH 350 Shorty.
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post #17 of 24 Old 04-02-2011, 09:35 PM
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Re: 3.4 dohc

hmm time wish i had it, cash hell yeah, head turner maybe if they know what they are seeing. maybe in the future i'll be different but i wouldn't want to take on a project like that. Sounds like one of those huge cool projects but will forever remain a project but i don't know the guy (no offense). Just saying if you want to do this realize the commitment your making lol b/c you have alot of time, and cursewords ahead but the journey will reap great rewards. I know you know this though.

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post #18 of 24 Old 04-04-2011, 10:28 AM
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Re: 3.4 dohc

if you wanna build something that bad you make "TIME" the money is where most builds die.. i was making time the other night cleaning up and installing piston rings for my mazda at 3am. of coarse you have to cut out sleep to make time but that shit is over rated anyhow.
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post #19 of 24 Old 04-04-2011, 11:53 AM
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Re: 3.4 dohc

amen, just take a hit on the crack pipe or meth if thats your thing and hit that shit all night. For some its time for others its money. With the economy people are finding enough time but not much money haha. If your making money i doubt you'll find much time.

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post #20 of 24 Old 04-06-2011, 06:09 PM
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Re: 3.4 dohc

Hijack *** I have 3 Olds deisel 4.3 V6s. I will put one in a dime soon with a 5 speed. That will be different.

S10 addiction:
1)'82 S10, 383, 700R4, Shorty
2) '85 S10, 3.4, 700R4 4x4 stretch cab (Redneck)
3) '90 S10 2.5, 5 speed shorty
4) '91 S10, Built 3.4, 5 speed shorty (Voodoo)
5) '92 S10, 2.5, 5 speed shorty, (Barbie)
6) '92 S10, 2.5 5 speed, Shorty
7) 1979 LUV, Buick 3.8 V6, TH 350 Shorty.
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post #21 of 24 Old 04-06-2011, 07:38 PM
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Re: 3.4 dohc

selling 1983 2.2L isuzu diesel engine for 200 cash running with 100k on it.

JK, seriously though any updates?

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post #22 of 24 Old 04-07-2011, 12:27 AM
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Re: 3.4 dohc

I'd love to see someone complete a RWD 3.4 DOHC swap.

If we all did V8 swaps, then the world would get pretty boring. I literally yawn everytime I see another V8 swapped dime, 240Z, RX-7, etc. That's why my car, nor my GFs Mustang will ever have a V8 between their fenders as long as we own them. That being said there is ONE V8 I would seriously consider, the LT5, it's rare, and pretty exotic being DOHC as well. It would have to have 180 degree headers as well.

I had looked hard at using the 3.4 DOHC heads on a pushrod block. The only thing that kept me from doing so was the location of the intake ports and how the pushrods would have to run right through a couple of them. I figured that would likely disrupt the flow enough that I wouldn't really see as much gain out of the heads as I could have.

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post #23 of 24 Old 04-07-2011, 01:19 AM Thread Starter
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Re: 3.4 dohc

i have to put this project on hold for a while about to move in a week or 2. I really want to do this build sounds like a major challenge, Im going to try and use the original intake on the dohc and modify my firewall and maybe route the intake into the cab down to passenger side foot vent.




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post #24 of 24 Old 04-07-2011, 08:45 AM
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Re: 3.4 dohc

It would be easier (and likely better) to turn the intake around or build an adapter that moves the TB to the side of the engine anyway.

I know in some areas, that an intake that is passed from the engine bay to the interior would fail a safety check, resulting in the car getting pulled from "fit" status.

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Tha toy: 1973 Datsun 240z 12.71 @115
Tha other Toy: 1923 T-Bucket
Another Toy: 1987 Buick Skyhawk
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