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GM 60* V6

Discussion in 'Newbie and Basic Turbo Tech Forum' started by Outofrshell, Aug 31, 2017.

  1. Outofrshell

    Joined:
    Jun 7, 2017
    I am totally new to turbos but I have been wrenching nearly all my life so I understand the principles of a turbo but I have never been exposed to them. First I will explain what I drive and it's engine build to make sure this project is even feasible and doable. The vehicle is a 1989 Isuzu Trooper 2.8 GM v6 w/ 5 speed, the engine is bored .040 over and stroked with a 3.1 crank making it a 3.2. Compression was left at about 8.5 to 9.0, It has a Comp 252 cam, 1.6:1 roller tip rockers ,Comp springs,lifters and push rods.The intake was milled out to 1&11/16" and uses a TBI from a 4.3 and the smaller 2.8 injectors. Fuel management is done with a stock ECM from a 3.1 Rodeo. Exhaust was upgraded to 2.25 from the Y back. Estimated HP is now about 160 just by figuring a base of 125 and adding up the mods. The Trooper sits on 31s and a final drive of 4.56 but it still runs out of power on hills or headwind so the the thoughts of a turbo have reared it's head. All advice and ideas would be appreciated. Thanks Dave
     
    Outofrshell, Aug 31, 2017
    #1

  2. riche

    Joined:
    Aug 29, 2017
    I started here. A lot of good explanation in there.
    But I'm new to turbos too so I can't help you much. I'm still learning. But this will help you calculate what your engine needs. I am now trying to understand how to use this information correctly. And find enough compressor maps to plot my calcs on.

    https://www.theturboforums.com/thre...ork-theory-intercooling-and-much-more.366081/

    Are you good at math?
    I used excel to make spread sheet with the equations. Hope this helps
     
    Last edited: Aug 31, 2017
    riche, Aug 31, 2017
    #2

  3. Drac0nic

    Joined:
    Feb 28, 2005
    Find a stock GN turbo and stick it on there or a Chinese T3/T4 hybrid. Use a carb bonnet, add fuel via some 350 cop car injectors or early 454 injectors. The 60 degree engines have a pretty good rep on thirdgen.org for taking boost. I will say I'm not sure if the manifolds flip or not, but I'd give it consideration. If not, just build a log manifold that looks similar to a Grand National one and stick the turbo up front if it fits.

    You'll need fuel as well, so I would probably plan on a FP upgrade as well. Tuning, well the easiest route would probably be a Megasquirt II unless you can figure out how to hack a GM ECU to do what you need to. EBL may be an option.
     
    Drac0nic, Aug 31, 2017
    #3

  4. jlbayes

    Joined:
    Feb 14, 2015
    I would think an hy35 or he351cw would work well too.
     
    jlbayes, Sep 1, 2017
    #4
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