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911st 911st is offline
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Join Date: Jan 2004
Location: Sacramento
Posts: 7,269
You guys are on to some cool stuf.

I have long suspected the stock cam is the best 'pre-boost onset' cam for making HP. Mostly because it creats the longest compression stroke of the bunch.

However, many report the SC cam improves low end with its lower 'effective compression' stroke.

I am wondering why the SC is reported as such an improvement?

I know that if the exhaust system is not up graded the SC will inhibit low end per Bruce Anderson's book noting the restrictive stock early US headers much be improved on.

I am wondering if it is in our deffenition of what low end is?

For most it is probably boost onset that is low end. In my thinking it is the off idle normally asperated part.

Cold it be the SC cam has somthing about it that brings boost onset in earlyer or when it dose come into boost onset it dose it better?

I am wanting to believe it is because it gets more air in the motor but more significantly with the exhaust valve opening earlier less heat is converted to TQ and more goes to the turbine to spin it up faster.

That is my guess.

Anyone know why the SC is seen to improve low end over the stock cam?
Old 01-31-2010, 07:07 AM
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