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bigdiceman · 05-07-2008, 11:41 AM

I was going to ask if anyone was using the Profiler heads from Ray Franks, or the CFE heads? I think the port designs are the latest greatest on these heads. Another thing that is hard to believe, I have seen a 500" pro stock engine get a valve job and pick up 100 hp avg. The car picked up close to a tenth. I was always told when convertering hp from an engine dyno you calculate about 8.5% loss with an automatic heavy car. Its kind of a rule of thumb, too big of a cam, intake will make power but not accelerate a car.

05-07-2008, 11:41 AM	#82
bigdiceman Registered User Join Date: Feb 2008 Location: Humble,Texas Posts: 18	Re: post em up.... I was going to ask if anyone was using the Profiler heads from Ray Franks, or the CFE heads? I think the port designs are the latest greatest on these heads. Another thing that is hard to believe, I have seen a 500" pro stock engine get a valve job and pick up 100 hp avg. The car picked up close to a tenth. I was always told when convertering hp from an engine dyno you calculate about 8.5% loss with an automatic heavy car. Its kind of a rule of thumb, too big of a cam, intake will make power but not accelerate a car.