Originally Posted by MouseFink
A automobile engine will not start with 22 degrees of initial advance.
You are confusing "initial" timing with "initial timing advance". Initial timing is when ignition occurs without any centrifugal advance..
You cannot set the initial timing when the engine is idling above 650 - 700 RPM because the centrifugal advance mechanism is advancing the initial timing. Stock production engines are the only engines that the "initial" timing can be set and only when the engine is idling below 650 - 700 RPM.
You must check with the distributor manufacturer if you want to set the initial timing when an aftermarket distributor is being used.
All you do is slow down the idle speed so its is idling on the base of the timing curve.
not that hard
And cars will start with 22deg initial timing.
When you are dealing with non stock cams you cannot use what is used on stock motors.
non stock long duration cams need more inital timing at idle.
If you are not idling on the base of the curve at idle, the timing will drop off when you are in gear.
You don;t want that on a cammed motor.
Especially cams that have a tight LSA .
every GM car with headers needs a starter motor heat shield.
and a heat wrap.
adding a Ford type starter solenoid to your GM car really helps too.
In extreme cases like with locked out timing, a simple spark power interupt toggle switch on the dash
makes it easy to start a hot motor with lots of initial timing.