Not sure if this makes much difference, but I had spent a bunch of time playing with this Desktop Dyno program while I have been building my new motor. I had decided on the Crane 2031 cam installed straight up. My combo in this configuration graphed out at 400 hp @ 6000 RPM. When I played with the advance and retard, here's how it worked out:
-4 degrees: 404 hp
-2 degrees: 403 hp
+2 degrees: 395 hp
+4 degrees: 390 hp
Just an example of how minute the changes were from advancing or retarding it. As PKRWUD stated, it's the overall combo. Don't forget that as you change the cam's position in relation to the crank, you are also changing the piston to valve clearance! Just my $.02.
|