exhaust for 741 cam shaft whos running what
04-14-2010, 09:17 AM
#11
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Advancing the cams will help because the exhaust closes sooner. Also make sure the exhaust valves seal well as leaking exhaust valves will pull exhaust back into the cylinders at that point.
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04-14-2010, 02:08 PM
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heads were just done last winter everything new, they leak down all cylinders 5 to 7 %
04-14-2010, 06:31 PM
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I believe I have mentioned several times to you it matters greatly where the cam is degreed in. Particularly with the 741 because the overlap angle is high. If it is retarded you increase your EVC angle which gives more downward swept volume of the piston while the exhaust valve is open, regardless of lsa. 
Last edited by blue thunder; 04-14-2010 at 06:34 PM.
04-14-2010, 06:48 PM
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I believe I have mentioned several times to you it matters greatly where the cam is degreed in. Particularly with the 741 because the overlap angle is high. If it is retarded you increase your EVC angle which gives more downward swept volume of the piston while the exhaust valve is open, regardless of lsa.
04-14-2010, 06:50 PM
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04-14-2010, 10:18 PM
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741 cam, silent choice, both with teh blower and w/o. No issues. And these risors are not only the low ones, but shortened for the silent choice
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Last edited by US1 Fountain; 12-02-2011 at 10:59 AM.
