[Steve C.]

I may have missed which cylinder heads were going to be in use here.

This for conversation....

Remember the combustion chamber design is a big factor.
If Edelbrock heads, are they the old style Edelbrock design or their newer 'heart shaped' design that allows a higher compression.
If KRE d-port aluminium heads they have the improved 'heart shaped' chamber design.

Keep in mind this statement, "The design of the combustion chamber influences the performance of the engine and its anti-knock properties. The layout and shape of the combustion chamber has a bearing on the thermal efficiency and performance as well."


A tidbit.... Many years ago when I was planning a previous 462 build with old style Edelbrock aluminium cylinder heads without the heart shape chamber I contacted Dave Bisschop about compression ratios. At the time based on his dyno testing he was recommending a maximum of 10.25 compression with the 87cc Edelbrock chamber design as cast and 10.5 compression with the 72cc Edelbrock chamber design as cast. This was a general recommendation for engines leaving his shop to be used under all types of driving conditions, unknown gas quality, unknown camshaft parameters, and not knowing how the end customer would tune and operate the combination. Obviously under the right conditions it could be higher but like many professional engine builders there not going to suggest pushing it for most people with a lot of unknowns.


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