3.4l boosted in an s10

[92ratt10]

ok so heres the thing i really would like to turbo my truck. i already know im going to but a 3.4l from a camaro in there and use the ecm and wiring so its sfi (5 speed trans). and im at a stand still though. i cant figure out a good afordable way to tune the engine. ive heard of using a fmu, and stock ecm? and i dont see how that would run to well with around 10psi. what about the fact of retarding my timming with boost? i havent found a clear anwser from any forum where some one has said this is how you do it and it works great. and thats my problem. im really picky and if i cant tune the engine as well as i want am not going to turbo it. so can any one help me these are my questions.

what fmu?
controling timming (ecm tunning)?
injectors?
turbo size?
also what would be a good cam size to run?

thats all i really need to know and im set. and its hard to find clear cut awnsers an alot of these forums for the rwd 3.4l. if anyt one has any info on engine they have done or ppl they now that would be awsome so i can finally get my engine started.

-vet0-

[MidnightriderZ24]

as for turbo size, 57trim will give u awesome street response and top end, good over all turbo, im running one in my 3400 swapped cavalier and make 358 wheel horse on 10psi. im not sure if the camaro ecm will work with a tgp patch. im using a tgp chip with a 5 speed patch, and tuned in 30# injectors

[ezrollin]

I'm planning the same project,a turboed 3.4 into an s10 and I've been doing a lot of research. I found a guy that turboed a 3.1 camaro and posted a 12.6 et 1/4 mile . I can advise you to do lots of research because no one is going to give you all the answers you need. First, there is no" best turbo" only a best turbo for a given application.The turbo you need for a hp street engine isnt the choice for a all out drag engine. I don't know how much you know about turbos but will be glad to share what I've gathered so far or point you to places I found info.

[92ratt10]

that would be great. im looking for more of a daily driver so i want to make it very streetable. i have found a guy that has a 3.4 swaped blazer, tbi, and superchaged that is running an accel programable ecm and he said it runs perfect. so im looking into that.

[Guest]

https://www.junkyardturbos.com

This will be a lot of work, especially if you combine it with your other idea of building the hybrid.

There is no one "best way" to build and tune an application such as this.

Some people prefer using a stock tune or close to with an FMU.

Some prefer extra injectors, some prefer all out programmable or tuned ECMs, and combinations in between.

(BTW Midnight, the TGP patch won't work with the F-body PCM that ran the 3.4.)

For ignition timing, you can use MSD ignition systems and control modules. For the DIS ignition you'll need a DIS-4 this will run 6 or 8 cyl DIS engines, or up to 4 coils. This includes one stage of retard which has been and can be used successfully in a turbo application, but it's on or off, no variable timing control VS boost pressure. For that, you can get an external piece that runs in series with the DIS-4, to give the extra computer programable control.

I think when I get my truck running again, I might try running a "stock" tune and using the FMU that I have sitting in a box.

[rickykline]

midnight whats the exact specs on your turbo??? are you spraying it too?

[ezrollin]

Go to thirdgen.org,I think they call their turbo section "power adders" click on that and then do a search on post by dave's 12sec camaro,he's the guy that posted a 12.6 sec. quarter.He was using a 2.8 mpi on a 3.1 and finally went to a megasquirt for ign. and fuel control. As you gather knowledge be sure to post and share. You don't see many turbo charged 3.4 s10's because unlike the 4.3 no one makes a kit ,you'll have to do some fabbing for yourself.Did you read the online articles Hot Rod Magizine has on turbo charging?

[92ratt10]

well if i was goingto turbo the 3.4 i would not to the hybrid 3400 top end just so i can save my self the problems. i looked in to the msd systems and a fmu. i knew i could run that and make it work. i was just hoping for a all in one tunnable ecm / stand alone. i just dont have the money for all that right now so the turbo project may be on hold for a little while. and thanks for the info on accel i didnt know the timming retard was only on and off like that. i havent got a chance to read into it much.

now if your running a stock like ecm are you also running a 2 bar map so it can see boost? or just a fmu and thats all. because im sure your fine with low boost levels but i want to try to go woth a very tunnible set up in case i want to run 15 or more psi after i build the bottom end of course.

adn thats the great part about turboing a 3.4 powered s10. no one does it. and if you want to make it easy on your self a remote mounted turbo is a an easy way. the longer piping helps to cool it. no manifolds to make. all you really need is an oil pump for the turbo. and the lag is not that big of a problem so ive read from ppl. ive seen a 2.8 turboed this way and it looked like a cheap and easy was to do it. just a thought.

[Guest]

LOL, do the hybrid then, its way more effciant than an iron head boosted application IMO, then when your ready for some real power add the turbo in.

To me turboing an iron head 660 is like eating pork chops, when you could easily have prime steak.

The limitations of the iron head make it a poor choice IMO for making more power. There's a limit to being able to get more air into and out of an engine.

Once you realize that more boost does NOT equal more power, then you will realize that having a good foundation is the key.

[ezrollin]

"To me turboing an iron head 660 is like eating pork chops, when you could easily have prime steak." You could say the same thing about 3.4's in general.Why not just do a 4.3 or V8? You can make 400 hp with ported iron heads,that would be plenty for some people.I applaude your efforts with the 3400 heads and intake and even have been considering them myself.I would be interested to see how much hp you get say at 15 psi with the right turbo.

[92ratt10]

yea you do have a point the alu. heads would be the best way to go. plus with that 3400 top end it would make it easy to tune that engine for a turbo. and i know i can get a forged bottom end for it so i really cant wait to start this. but i think im going to wait for a yr or two and get some thing else to put this engine in. becasue my bagged s10 isnt really set up for that kinda power. but i do have my daily driver 93 that may be a great project once i get a new truck.

and very true more boost doesnt = more power. you have to design and build and engine from the ground up for a turbo IMO. i mean you can slap a turbo on any thing but if its not set up for it or tuned right id say you just wasted your time and money.

i know i could do a 4.3 or even join every one else and build a sbc. but whats the fun in that. just so i can go to a show and have some guy go "wow another 350 in and s10". or wow i have one too. or i can go there and turn heads with a 3.4 hybrid turbo. hmmmm take your pick.