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best guess part 3 help me pick a compression ratio https://www.slantsix.org/forum/viewtopic.php?t=3385 |
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Author: | Jerry [ Thu Mar 21, 2002 4:06 pm ] |
Post subject: | best guess part 3 help me pick a compression ratio |
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 |
Author: | Dart270 [ Fri Mar 22, 2002 7:14 am ] |
Post subject: | Re: best guess part 3 help me pick a compression r |
Quote:
: 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 |
Author: | Jerry [ Fri Mar 22, 2002 1:57 pm ] |
Post subject: | Re: best guess part 3 help me pick a compression r |
Quote:
: 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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