Getting The Right Compression Ratio...

Try this calculator on the Keith Black website

http://www.kb-silvolite.com/calc.php?action=comp

I have the KB 2308, with the Edel Performer Heads, and a 0.039 Head Gasket, and my compression is too low, static at 9.6, and dynamic at 8.7. Should have gone with the 2310's more compression! As it is, I can run 87 octane with no knocking or pinging. According to all that I've read, with AL heads you can run an extra point of compression, so mine should be closer to 11.5:1, to maximize the engines power. Dave Hughes confirms this, but his shop (Tim) is the one who sold me the rotating assembly in the first place, and knew my cam & heads. Go figure...