What is the advance on chevy 350 timing?
The vacuum canister can advance 24 degrees beyond initial timing.
For a Chevy 350 with rotor that turns clockwise what direction do you turn distributor to advance or retard?
buy a timing light. clip it to the #1 plug wire. loosen the bolt on the distibutor. Unplug the timing advance. start the engine Point it to the harmonic balancer and turn the distributer until the timing mark on the timing cover lines up with the mark on the harmonic balancer. Tighten the distibutor bolt. plug in the timing advance.
There is no set timing for this specification. If you are using a mechanical advance distributor rather than a computer you will initially target 35 degrees total advance over 2500 rpm with an idle setting of 10 degrees with out vacuum advance. From there experimentation to determine most effective setting for your engine.
It is not adjustable, sealed from the factory. DO NOT FULL WITH IT There is no conventional idle adjustment for the TBI motors, but if your willing you can advance or retard the timing by rotating the distributor housing a couple of degrease, but not to much. This will raise or lower your RPM a bit.