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Author
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Topic: 302 compression ratio
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05s197
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Member # 13235
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posted
 
 
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
Posts: 54 | From: walnut creek/concord | Registered: Oct 2013
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5.0 LsX
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Member # 10017
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posted
depends on what pistons are in it..but 10.1 is fine on 91
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91' Notch
Posts: 1260 | Registered: May 2010
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05s197
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Member # 13235
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posted
Thanks, I used summit racings compression ratio calculator.
Posts: 54 | From: walnut creek/concord | Registered: Oct 2013
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Tom Renzo
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Member # 13165
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Depends on the cam not the compression ratio!!!!!!!!!!
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I spend money i don't have. Building cars i don't need. To impress people i don't know.
Posts: 557 | From: CT | Registered: Sep 2013
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05s197
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Member # 13235
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posted
Comp Cams recommended part # 35-424-8. If I got the cam with the heads would I be good?
Posts: 54 | From: walnut creek/concord | Registered: Oct 2013
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Tom Renzo
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Member # 13165
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posted
Need the specks to determine SWEEP COMPRESSION NUMBERS!!!
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I spend money i don't have. Building cars i don't need. To impress people i don't know.
Posts: 557 | From: CT | Registered: Sep 2013
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Tom Renzo
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Member # 13165
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posted
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 ]
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I spend money i don't have. Building cars i don't need. To impress people i don't know.
Posts: 557 | From: CT | Registered: Sep 2013
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05s197
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Member # 13235
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posted
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.
Posts: 54 | From: walnut creek/concord | Registered: Oct 2013
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05s197
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Member # 13235
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posted
the link I put up was what comp cams recommended to me. But its a solid roller and Im running hydraulic rollers.
Posts: 54 | From: walnut creek/concord | Registered: Oct 2013
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Tom Renzo
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Member # 13165
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posted
That is a different thing completely. As a solid cam has what we call clearance ramps compared to a hydraulic cam that does not!!!
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I spend money i don't have. Building cars i don't need. To impress people i don't know.
Posts: 557 | From: CT | Registered: Sep 2013
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4IDFOX
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Member # 9921
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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.
Posts: 375 | From: Redding CA | Registered: Apr 2010
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05s197
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Member # 13235
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thanks, I will try that.
Posts: 54 | From: walnut creek/concord | Registered: Oct 2013
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90GT510
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Member # 9199
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off topic: how much does a block from oreilly cost and whats included?
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Stay Sydewayz
Posts: 1725 | From: East Bay/Dallas, TX | Registered: May 2009
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