Join Date: Sep 2006
Location: Austin, Texas, USA
Each tooth on the cam sprocket changes the cam timing by 10.6 degrees. You must also consider valve to valve clearance. I expended a lot of energy playing with the cam timing years ago. You can move the torque peak around maybe 500 rpm, higher or lower, depending on which way you go with the timing. I was adjusting both cams, initially to get more top end power and living with a flat spot down low (3000-4000). I got tired of that and set them for more low end. I forget exactly which way I was going.
It seems to me that if you consider valve overlap, more overlap favors higher rpm and less favors lower rpm. I might be wrong about that.
What are you hoping to accomplish?
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