Thread: compression......

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Originally Posted by NO1UKNOW

Thanks Inspector....looks like first thing I have to do is get those heads cc'd to see what I actually have so I'll be taking them to the machine shop soon (I'm in Mexico so the work is cheap here) that way I know what pistons to get and maybe get a little work done while they are there. What's the most compression I get and run 91 octane? Secondly at the time I got my XE cam I didn't do to much research and was pretty much what I was able to afford now after more research is the reason while I am going roller, my engine has at most 50 miles on it and half those with a bad 700 tranny so engine is practically new so I will go roller before the current cam gives. What are other good economical cam companies? budget is a little tight since I will be putting pistons, cam, regearing, and buying at least one locker too at the same time so a good quality economical company would suit me best right now. Oh and another thing I currently have an older weiand intake on it should I get rid of it too? And my carb is a Q-Jet 750 that I chose for off road purposes is it wise to go bigger then? Thanks for all your help.....

Howards usually has the best deal on retro roller kits, but I reeeaaaalllly like the Crane cam that I linked for you.

Use any intake you wish, I'm just telling you that the RPM will make more power from idle to 6500 than any other manifold out there. If you want to keep your Q-Jet, use the 7164 manifold. If your Weiand is a Stealth, keep it. It's the same as an RPM. Here's the procedure for measuring high-rise manifolds......the front on an RPM or Weiand Stealth should be 4.450" (about 4 and 7/16ths) and the rear measurement should be 6.000"
http://www.edelbrock.com/automotive_...olds/lb/ab.gif

As far as static compression ratio, 9.5:1 is currently considered the upper limit to use with iron heads, 10.5:1 with aluminum heads. Build this motor at 9.5 using the parts I listed. It'll run detonation-free on pump gas and you'll be happy with it.....or I'll eat my hat.