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Old 10-18-2019, 02:49 PM   #3
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Re: Cam Swap Timing Question

Originally Posted by RecoilRob View Post
It doesn't matter where the chain tensioners are...taking material off of the cylinder puts the cams closer to the crank so their timing will be advanced.

Picture holding the cam and assume that it is in perfect timing with the crank...then slowly drop the cam down rolling along the moves forward so without moving the crank the cam is now advancing. Advancing the intake timing means the valves will close sooner which can boost effective compression and often will boost the midrange torque, and if you don't go overboard with it the top end power shouldn't be affected. But this will depend on the exhaust system tuning so be aware that ANY changes will affect the system and be prepared to alter other things to compensate.
Timing gets retarded
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