This is topic 302 compression ratio in forum Tech Talk at Northern California Ford Owners  .


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Posted by 05s197 (Member # 13235) on :
 
I have a 302 longblock from O'reilly's. I wanted to put some AFR 165 cylinder heads on and i believe that with the 58cc heads the CR would be 10:1. Will this work with 91 octane? theyre aluminum haeds too
 
Posted by 5.0 LsX (Member # 10017) on :
 
depends on what pistons are in it..but 10.1 is fine on 91
 
Posted by 05s197 (Member # 13235) on :
 
Thanks, I used summit racings compression ratio calculator.
 
Posted by Tom Renzo (Member # 13165) on :
 
Depends on the cam not the compression ratio!!!!!!!!!!
 
Posted by 05s197 (Member # 13235) on :
 
Comp Cams recommended part # 35-424-8. If I got the cam with the heads would I be good?
 
Posted by Tom Renzo (Member # 13165) on :
 
Need the specks to determine SWEEP COMPRESSION NUMBERS!!!
 
Posted by 05s197 (Member # 13235) on :
 
couldn't copy the specs over heres the link.

http://www.compcams.com/Company/CC/cam-specs/Details.aspx?csid=896&sb=0
 
Posted by Tom Renzo (Member # 13165) on :
 
OK it is a mild cam to an extent but not for 302 inches. It is cut on 110 but has some good duration . Throw of the dice but i think if you go easy on total timing you should be ok. But my gut feeling is it is a border line cam for that much compression with 91 R+M. I would go for it. Good luck on your build!! That should work good with a stick and at least 3.7 in the tail.

[ 2014-04-03, 04:49 AM: Message edited by: Tom Renzo ]
 
Posted by 05s197 (Member # 13235) on :
 
thanks at the moment its a C4 but I might be doing a T5 swap soon and I will be doing 3.70 gears sometime soon. the longblock is brand new, 0 miles.
 
Posted by 4IDFOX (Member # 9921) on :
 
Have a custom cam specked, you will be happy.

http://www.flowtechinduction.com/small-block-windsor-1/
 
Posted by 05s197 (Member # 13235) on :
 
the link I put up was what comp cams recommended to me. But its a solid roller and Im running hydraulic rollers.
 
Posted by Tom Renzo (Member # 13165) on :
 
That is a different thing completely. As a solid cam has what we call clearance ramps compared to a hydraulic cam that does not!!!
 
Posted by 4IDFOX (Member # 9921) on :
 
If you fill out one of info sheets on the FTI link I posted and let Ed know your needs he will spec a cam to fit. It will clear your pistons and run on pump gas. He will help you get more out of your car than an off the shelf cam that could have clearance issues.
 
Posted by 05s197 (Member # 13235) on :
 
thanks, I will try that.
 
Posted by 90GT510 (Member # 9199) on :
 
off topic: how much does a block from oreilly cost and whats included?
 
Posted by 05s197 (Member # 13235) on :
 
quote:
Originally posted by 90GT510:
off topic: how much does a block from oreilly cost and whats included?
http://www.oreillyauto.com/site/c/detail/PTQ1/DFXD.oap?ck=Search_dfxd_-1_2949&keyword=dfxd

this is what i have. not too bad.
 




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