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Old 09-30-2011, 12:04 PM
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I figured with .041 head gasket thickness (the good ol' Felpro 1003) and got static CR of 10.29. Using 284 advertised duration and 106 LSA (specs from Isky's website) gives an intake closing point of 68* ABDC and an 8.05 dynamic CR, so this agrees pretty closely with ssmonte's figures. With a stock deck height of .025 and these thicker gaskets your quench will be .064 or .066. That would make it more detonation prone, so might need some timing pulled out. With the stock deck height but built with the thinner .015 shim gasket for a better quench, I get a static CR of 10.98 and 8.59 dynamic CR, which is pretty high for pump gas, there's a good chance it would need some timing pulled out. If the block was 0 decked with this combo your static CR would be 11.7 with a 9.13 dynamic CR, I wouldn't run that on pump gas.

With a setup that isn't "coming on" til 3000 it'll need a pretty high stall converter and lower gearing or it will be a pooch on the street. And then it'll need a good-sized tranny cooler to make it live. As ssmonte pointed out, towing anything with this setup will be a real exercise in frustration. A more street friendly combo would have been to use an 18-cc D-deck dish piston with a shim head gasket for a tight quench, your static CR would be right at 10:1. With this combo something like an Isky 270 Mega cam would put your dynamic CR at 8.21, should run great on 92 octane and be much more street friendly, especially if you're running a stock converter with your 3.42 gears.

Last edited by BigEd36; 09-30-2011 at 12:16 PM.
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