cam lsa
12-16-2008, 04:17 PM
#15
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If that is what TSP told ya, most of the guys here told ya, that sounds like a good cam for what you want to do.......... It will make good power with out the FI and good power with it.... You will drive your self crazy thinking about it.. DO IT
John
John
12-18-2008, 12:49 PM
#18
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The cam spec that affects Forced induction efficiency the most is overlap, to which in most cases LSA is a good indicator. The narrower the LSA (smaller number) typically means the camshaft would have more degrees of overlap. That would be the period when the exhaust valve is closing and the intake valve begins to open. In a forced induction application the more duration overlap present in the cam's specs, the more forced intake charge will be blown out the exhaust - read loss of boost, fuel, and efficiency. To minimize this you want to minimize overlap, to a degree. LSA is not always an accurate indicator of overlap, as variables such as lobe duration and lobe ramp/lift rate have to be looked at as well. You will also want to look for a cam that has a nice long exhaust duration, 6-8* greater than your intake, remember that your exhaust valve and cylinder head port are smaller than on the intake side.
