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Re: More cam Thoughts
[Re: Sport440]
#945980
03/11/11 12:26 AM
03/11/11 12:26 AM
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Joined: Feb 2003
Posts: 4,953
Houston, Texas
TheOtherDodge
master
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master
Joined: Feb 2003
Posts: 4,953
Houston, Texas
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Quote:
Quote:
As a general rule, a wider LSA will lessen the overlap, thus giving a smoother idle and broader powerband. But, with that said, a cam with an LSA of 110 could actually have less over lap than a cam with 112 LSA. You just have to look at the valve timing events. 
Overlap can only be changed two ways. LSA and Duration/split duration.
For instance if you wanted a 240* duration @.050cam on a 108 LSA Your overlap will be fixed.
You cant move the valve timing events around and change the overlap and have the same 240* @.050 cam on a 108 LSA
Correct. I hope I did not give the impression that you can change overlap once it is ground in the cam, because as you stated, you can't. I meant that when you have the cam ground, you can change the LSA then to change the over lap. 
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