Bonneville America Forums Forums Technical Forums Performance Mods Finally got my Camshaft Timing Specs

Dinqua, I wrote this in reply to your post, on the Megacycle thread, about your dyno results with your megacycle cams, don't know if you saw it;
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Dinqua,
A quick and easy fix to get back your torque and more power with these megacycle cams you have installed, is to advance the megacycle exhaust cam 1 tooth, thereby opening & closing the exhaust earlier, reducing the overlap from 42 degrees to 27 degrees.
I advanced the Bonneville exhaust cam by 1 tooth that I had fitted to my Thruxton engine.
Trust me it works, got my bottom and midrange back and more.
I have a dyno simulation program and inputed the 790 SM cam specs, 790 SM intake retarded only & 790 SM exhaust, megacycle cam specs, megacycle intake & advanced megacycle exhaust.
The megacycle cams make about the same hp as the 790 SM cams but with a loss of torque. The retarded intake 790 SM, 790 SM exhaust makes similar torque and hp as the megacycle cams with the exhaust advanced.

Cheers..........Agro
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