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Questions on doing a 3.4 D.O.H.C. hi-performance rebuild

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  • Questions on doing a 3.4 D.O.H.C. hi-performance rebuild

    Hey everyone,I'm new to the site so please forgive my ignorance. Anyway i have a 92 Pontiac s.e. w/the 3.4 dohc,the car has 150,000 miles on it and i had wanted to rebuild the engine in it at the beginning of next year.My plan was to do a basic engine rebuild and port and polish the heads/intake,Add a performance computer chip (if there's one available),add a c.a.i. and maybe look into re-grinding the present cams (if it can be done) or adding performance cams (are any available?)I was just wondering if these engines can be bored out to accept larger pistons,Or is that something to stay away from?Thanks,All help is appreciated.

  • #2
    RE: Questions on doing a 3.4 D.O.H.C. hi-performance rebuild

    Id tell you to check out the store site, but you may as well wait until the new store is up since it will be more descrptive and up to date soon. You can get the cams reground by either CHRfab or supposedly crower. Pistons, you can bore over the cylinders some but I wouldn't go more than you need to. Computer chip, 60v6 store, i write them:P CAI, talk to DOHC or check the buy sell trade section for his post.
    Ben
    60DegreeV6.com
    WOT-Tech.com

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    • #3
      That about sums it up. Not too much that can be done to these engines, but it can all be done right here. What a wonderful site.

      92 GP GTP 3.4DOHC 5spd
      88 Fiero Formula CONVERTIBLE 3.4DOHC 5spd
      84 Fiero T-Top 3.4DOHC 5spd
      There seems to be a pattern there.

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      • #4
        Don?t forget about changing the timing. I can?t remember the numbers.
        1995 3.4 DOHC Grand Prix gtp
        cold air intake, high flow cat, dynomax mufflers.

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        • #5
          13 degree total timing change +6 intake -7 exhaust

          Thanks I forgot about that one and I've even done it, hard one to forget.

          92 GP GTP 3.4DOHC 5spd
          88 Fiero Formula CONVERTIBLE 3.4DOHC 5spd
          84 Fiero T-Top 3.4DOHC 5spd
          There seems to be a pattern there.

          Comment


          • #6
            Thanks for the help,This looks like a great site

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