[CobraEd]

Renman, Camshaft timing and ignition timing are two totaly different things, but ignition timing is *dependant* upon camshaft timing among other things.

A hot cam with lots of duration and overlap builds less cylinder pressure at low rpm, so you can run more base timing to give a little more throttle response and torque at low rpm to compensate.

Also:

All things being equal, a heavier car would run a little less base timing than a lighter car.

A stick shift car would run a little less base timing than an automatic car.

It is all a matter of cylinder pressure vs load and all the variables that affect that.

Ed