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Copper Head Gaskets

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  • Copper Head Gaskets

    There have been several discussions about thin copper head gaskets used to increase compression here. I'm building a 2.8 to 3.1 hybrid RWD iron heads, #981 3.1 crank and 3.1 pistons. Compression around 8.8. Would these copper gaskets give me a little more compression and what are the shortcomings and any extra machine work necessary? Also where do you get them and what's the part number?

    Thanks
    '86 S10 Blazer 4WD, '87 2.8 with 3.1 crank and pistons, A.R.I. "Stage 2 Cam", Iron Heads with stiffer springs, Holley TBI, Manifold bored to fit the TBI Base(4.3 size), Fiero Covers, MSD Coil, DynoMax Muffler and 2.5 Tailpipe, no cat, Auburn Limited Slip, 3.73 final Drive. 700R. '85 Fiero GT 3.4 Hybrid, relieved top intake and exhaust, 57mm TB, Auto. 3.06 final drive.

  • #2
    I think you need to machine o-rings on the block or head to use them after you decked and vaited (spelling?)the block and resurfaced the heads. Not much increase compared to stock gasket for the work. For that much work I would slap on some FWD aluminum head stuff for 11-12:1 compression.
    88 Beretta GTU turbo . 90 Black ASC/McLaren TGP, awaiting 4t80. 2003 Grand AM se 3400/4t45 daily grind.

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    • #3
      Thanks for the reply. Will all the stuff from the TBI work, using the 3.1 aluminum heads and matching pistons with a TBI manifold? I have the pistons for iron heads and the iron heads, so I don't know that this would be worth it.
      '86 S10 Blazer 4WD, '87 2.8 with 3.1 crank and pistons, A.R.I. "Stage 2 Cam", Iron Heads with stiffer springs, Holley TBI, Manifold bored to fit the TBI Base(4.3 size), Fiero Covers, MSD Coil, DynoMax Muffler and 2.5 Tailpipe, no cat, Auburn Limited Slip, 3.73 final Drive. 700R. '85 Fiero GT 3.4 Hybrid, relieved top intake and exhaust, 57mm TB, Auto. 3.06 final drive.

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      • #4
        No, its a totaly different setup from the heads on up. You would have to use the heads, intake mani. and fuel rails from the aluminum head engine. You would keep your pistons you have now.


        I think the steel shim gaskets is what you want or the MLS gaskets. They might have a lower compression thickness and don't require prep work like the copper gaskets. SHould give you a jump in compression.
        88 Beretta GTU turbo . 90 Black ASC/McLaren TGP, awaiting 4t80. 2003 Grand AM se 3400/4t45 daily grind.

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        • #5
          Originally posted by TurboGTU View Post
          No, its a totaly different setup from the heads on up. You would have to use the heads, intake mani. and fuel rails from the aluminum head engine. You would keep your pistons you have now.


          I think the steel shim gaskets is what you want or the MLS gaskets. They might have a lower compression thickness and don't require prep work like the copper gaskets. SHould give you a jump in compression.

          Don't forget the distributor can't be used either.
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