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Forum locked  This topic is locked, you cannot edit posts or make further replies.  [ 3 posts ] 
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PostPosted: Thu Mar 21, 2002 4:06 pm 
Thanks, now that I know my c.r. is 7.85 to 1, and it's too low, what c.r. should I try for? This is a 1975 30 over 225 that is going in a pickup truck for highway use. I have the M.P. cam P4120243, we have it degreed in at 106. The engine is stock, just a good rebuild with good parts, port matched 2bbl intake and 2 1/4 single exhaust, we also took the fuzz off the combustion chamber. The cam card said 102 but was advised to go to 106? I want to burn the cheap stuff also. Please help as I need direction.
Jerry

roxnjer@aol.com


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PostPosted: Fri Mar 22, 2002 7:14 am 
(User Above) wrote:
: Thanks, now that I know my c.r. is 7.85 to 1,
: and it's too low, what c.r. should I try
: for? This is a 1975 30 over 225 that is
: going in a pickup truck for highway use. I
: have the M.P. cam P4120243, we have it
: degreed in at 106. The engine is stock, just
: a good rebuild with good parts, port matched
: 2bbl intake and 2 1/4 single exhaust, we
: also took the fuzz off the combustion
: chamber. The cam card said 102 but was
: advised to go to 106? I want to burn the
: cheap stuff also. Please help as I need
: direction.
: Jerry


If the truck is not expected to run hot, then I'd shoot for 9.0 CR for regular pump gas.

Lou


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PostPosted: Fri Mar 22, 2002 1:57 pm 
(User Above) wrote:
: If the truck is not expected to run hot, then
: I'd shoot for 9.0 CR for regular pump gas.
:
: Lou

Thanks Lou: The truck does carry a camper shell and the whole package weighs in just under 6000# Anyone else want to take a shot at this?
Jerry

roxnjer@aol.com


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