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Chevy Nick

New cylinder heads for the Vette

7 posts in this topic

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

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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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