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"CC" on my 94 Formy lt1 heads?

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  • "CC" on my 94 Formy lt1 heads?

    Well I just ordered a full 383 forged stroker kit... I am being asked the CC of my 94 lt1 heads.. these are fully ported and polished... combustion chambers were not modified.

    I think they are 64cc but not sure..

    thanks

    -Rick

  • #2
    If they have been "ported", part of the job is measuring the final combustion chamber volume - particularly if they put in larger valves and had to unshroud them. Its unlikely that they are 64cc.... that's the Gen 1 SBC standard. The LT1/LT4 heads are spec'd at 54cc's, although I have seen reports that suggest they are typically closer to 58cc.
    Fred

    381ci all-forged stroker - 10.8:1 - CNC LT4 heads/intake - CC solid roller - MoTeC engine management - 8 LS1 coils - 58mm TB - 78# injectors - 300-shot dry nitrous - TH400 - Gear Vendor O/D - Strange 12-bolt - 4.11's - AS&M headers - duals - Corbeau seat - AutoMeter gauges - roll bar - Spohn suspension - QA1 shocks - a few other odds 'n ends. 800HP/800lb-ft at the flywheel, on a 300-shot. 11.5 @ 117MPH straight motor

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    • #3
      combustion chamber

      I just had the intake and exhaust p&p... Nothing in the combustion chamber was altered... Just lt4 springs were installed

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