How do they come up with this Compression Ratio?
This comes from Ron's Pontiac Page. I have a 400 with 15 heads and get 8.8 and maybe 265 hp. I don't know anything about the 66 cam. what am I missing?
compression HP Heads Cam
YF FullSize 400 10.5:1 340 Auto 15 66 4 bb
Thanks
Greg
Last edited by footjoy; 10-20-2019 at 09:15 AM.
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