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Discussion Starter #1
Hello all
What would cams degreed at 108/110 effect a power band, and performance? Thanks in advance
 

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depends on the cam/head/motor combo. In my case 110/108 gave me hp curve that was going up all the way to 12.7k rpm which is not good. I had to advance intake cam to around 106 to move peak hp right before the rev limiter, power gain was everywhere except for peak hp #'s, and the bike went quicker at the race track.
 

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Discussion Starter #3
Thanks for the response....What effect does the exhaust setting have on the curve?
 

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exhaust doesn't have that much effect, but the higher the numbers, the more room you have between the valve and the piston. Changing the time when intake valve closes makes a lot more difference than changing exhaust valve nor the cam for that matters
 

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Discussion Starter #5
exhaust doesn't have that much effect, but the higher the numbers, the more room you have between the valve and the piston. Changing the time when intake valve closes makes a lot more difference than changing exhaust valve nor the cam for that matters
Thanks again
 

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exhaust doesn't have that much effect, but the higher the numbers, the more room you have between the valve and the piston. Changing the time when intake valve closes makes a lot more difference than changing exhaust valve nor the cam for that matters
+2

Designed cam profiles aside, road racing/street cams will give only so much, compared to drag racing specific profiles and such.....higher matching numbers give best peak HP and exhaust opening and closings' effects are only complimented to short or longer duration profiles.
 

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+2

Designed cam profiles aside, road racing/street cams will give only so much, compared to drag racing specific profiles and such.....higher matching numbers give best peak HP and exhaust opening and closings' effects are only complimented to short or longer duration profiles.
well put, exhaust centerline just complements the intake cam settings depending on the efficiency of the exhaust system controlling the overlap. There aren't much to gain on the exhaust side, intake closing event is where its at.
 
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