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removing the restrictions from a 91-95 intake

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  • removing the restrictions from a 91-95 intake

    the project engine.. a 95 GTP ..

    sawsall and die grinder with cutoff wheel made pretty quick work of the cast intake manifold



    here you can see the two biggest restrictions..





    so the plan next was to weld a 3" tube to the ends of the runners after doing some porting to them to improve flow and use the bolt on throttle body from a 96





    after cutting all the pieces and brazing them in place I took the intake to Coffee Hill welding.. they did an awesome job welding up all up for about 50$

    I then ground down the welds and used some epoxy to fill in any dips





    if you can fit your hand through a 3" hole theny ou can fist this intake to the back



    after sanding with 80 grit on a mouse palm sander.. adding 3 coats of primer and one of top coat..



    now back to tuning

  • #2
    Let me know what the performance results from that mod are. I have a spare 91+ upper intake I can use to do the same. I wonder what will happen to the power curve.

    Dave
    1991 Grand Prix STE
    3.4 DOHC
    1 of 792 Produced
    Extensive Mods Done

    1991 Lumina Z34
    3.4 DOHC
    Getrag 284 5spd
    1 of 30
    Canadian Z34 Models Made with the Getrag 5spd Wahoooo!

    1980 GMC Sierra Classic C25 With 18,000 ORIGINAL MILES!!!!

    sigpic

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    • #3
      wow... that looks f'in nice!

      Metal's soooo much better than fiberglass... :P

      btw, what's the deal with RFT?
      Okay now, that's enough of that.

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      • #4
        This needs to be said:

        TWO FRONT CAM COVERS!!!

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        • #5
          (rear covers)
          If you are driving a Chevy, everything else, is just a blur. 3.4 Carbon Footprint.
          sigpic

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          • #6
            That looks like what I was trying to setup only I don't want to cut the runners down that much. Your TB location is stock though so thats probably easier. Pending the powerband shift from doing that, I may just try it that way.
            Ben
            60DegreeV6.com
            WOT-Tech.com

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            • #7
              Smooth

              That is f-ing tight Man!!!!! Very nicely done.
              1995 Monte Carlo Z-34 with 141,000 miles

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              • #8
                what ever happened to your fire extinguisher intake?

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                • #9
                  the fire extinguisher is on the shelf waiting repair when i get around to it.. probably just make a mold and cast a new one from it..

                  since the last intake backfire was able to blow a welded seam on the new intake i am more confident about the composite one being fine under normal cercomstances..

                  I also fixed the backfire issue (bent ECM pin that was controlling the spark timing)

                  and after replacing the FPR that got damaged from the backfires...



                  idles great at 900rpm (whats the ecm is set to right now)

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