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New cylinder heads for the Vette

Chevy Nick
in Tech Section

Featured Replies

Finally got my PRC 215 aftermarket heads today, hot off of the CNC machine. 215cc runner, 60cc combustion chamber, 2.04/1.60" valves, PRC valve springs. Great flow, great compression, great piston to valve clearance. Sadly, my life will be getting in the way of a proper tune/dyno run, it will probably be 6 weeks before I can post results.

CH1.jpg

CH2.jpg

intake port

CH3.jpg

combustion chamber

CH4.jpg

exhaust port

CH5.jpg

customized:

CH6.jpg

total package:

CH7.jpg

  • Quote

    pretty. lol

  • Quote
    • 3 weeks later...

    PRC215 (averaged to get .550 numbers) ~

    311 int / 228 ex @ .550 lift

    Ratio : .73

    Nice! A smidge better than my Stage II Buick heads:

    Stage II SE ~

    290 int / 220 ex @ .550

    Ratio : .76

    These, ported, flow 350/260.

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