Questions about V8s..?

Question

What is the maximum compression ratio I can run before I have to start using higher octane fuel? I found a chart that says anything over 7:1 must use 92 or greater octane rating. However, I just read an article with a builder that used 9.1:1 pistons on 87 octane. Someone want to clarify on this for me? I've also been trying to figure out all of the particulars of a camshaft. I understand everything that can be changed on them, but I don't know how all of the variables affect power and drivability. For example, I was told not to use anything over 230*/230* duration if I wanted to keep the engines drivability (which I do). Is that accurate? What is the maximum overlap I should look for, and how much lift on the cam lobes should I look for?

More questions...lol. As far as cylinder heads go, what effect does a smaller/bigger combustion chamber have on overall engine performance? Anything in particular to look for when buying cylinder heads in order to obtain the best engine performance?

Answer 1

I don't mean to be rude, but that's an awful lot to ask of us to spend hours giving you all the variables in engine performance techniques.

You may want to do a little more searching on the Internet for engine performance and tuning.

http://www.cranecams.com/
http://www.edelbrock.com/automotive_new/mc/heads/heads_main.shtml

Before going into the engine internals, focus on getting the engine to "breathe" better.
ie. Headers, Flowmaster muffler, intake manifold, heads, etc.

Answer 2

i built a 283 chevy motor with 10:1 compression never had any detonation problems on reg gas and every 2nd tank droprd a can of octain booster in my glamas jeep with a mild lift cam mallory ign system dual carbs