Corvette aluminum heads

Discussion in 'Engine Topic' started by tlcronk, Dec 27, 2016.

  1. tlcronk

    tlcronk Member

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    I have a set of 1990 aluminum heads (#10088113) that I am putting on a 383.

    The camshaft is a Comp 262H-10, w/ 270/280 degree and .462/.469 lift.

    I have an Edelbrock dual plane 2701 and a 600cfm Edelbrock for carb..

    The manifold and heads are matched as close as I can get them.

    Also headers will be matched up upon install.

    All put into a 1979 Caprice 2dr. w/3.73 and a tricked turbo 350.

    Any thoughts or suggestions? Its a street machine mostly.
     
  2. jthomas

    jthomas Veteran Member Lifetime Gold Member

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    You may already know this, but those heads aren't the best choice for a 383. The 10088113 heads are the L98 Corvette heads used on the ZZ crate motors. The have a 58cc chamber and 163cc intake runners. They are too small for a 383, although they can easily handle the lift you are using and might work ok. You will definitely be leaving power on the table. If it were me, I'd be looking for 200+cc intake runner heads. The 10088113 heads run out of breath around 5500 rpms or thereabouts and they start running out of power at about 4800-5000.
     
  3. Lowend

    Lowend Administrator. .a car, a man, a maraca. Staff Member Lifetime Gold Member

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    +1 - those 58cc chambers tend to blow compression through the roof
     
  4. larrylarry

    larrylarry Veteran Member

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    I agree also
     
  5. rockheadrocks

    rockheadrocks Veteran Member

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    Between the tiny chambers and short duration cam, cylinder pressure will be through the roof! In my opinion, the L98 heads and 262 cam are a total mismatch for a 383.
     
  6. phat80

    phat80 Veteran Member

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    JM2cW as a C4 Corvette (1987 w L98)owner I would say do not install those heads until you have them checked for stress cracks. Like I said JM2cW.
     
  7. mark wagner

    mark wagner Veteran Member

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    I also have a pair of these heads, and plan on using them on a standard bore 350 with stock dished pistons. any suggestions on camshaft?
     
  8. tlcronk

    tlcronk Member

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    I will have -19 dished pistons in the 383.

    I figured around 10.1 compression with a .040 head gasket.

    I am only looking at around 5500-5800rpm max.

    Its the low end torque I am after. Thus the shorter duration camshaft.

    I thought before to use the 268H-10 but didn't want to sacrifice the cruise down the road.

    I have gasket matched the intake and heads. Headers are a tall top type for this head.

    The heads are also angled type plugs.

    We will see when its together.
     
  9. CorkyE

    CorkyE Veteran Member Lifetime Gold Member

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    Sounds like you all set to go, let us know how this combo works.

    A lot of experience spoken above.
     
  10. fester

    fester Veteran Member

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    Makes you feel like you are talking to your wife.
     

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