[Formulajones]

Originally Posted by steve25

One of the problems I see with race motors today is that many do not take advantage of todays programmable ignition systems, and even the ones that have it do not make full use of it.

At idle many race Cam’ed motors can take and want a lot of advance, even up to 55 degrees (and especially if your trying to get the motor to idle clean and as lean as possible ) but once the throttle gets cracked open that needs to drop back to 30 to 35 degrees .
At about half throttle with a good tune and fast burn chambers that may need to then drop back to 25 degrees.

Once at full throttle then timing needs to advance in the conventional manor.

Your not getting this with springs and weights, although at idle you might come close with vacuum advance.

Your right, the electronic timing control makes this so much easier.
Ive been able to manipulate mechanical timing control and higher idle timing with vacuum advance on engines like this and have good success that way as you mentioned, but electronic control has the ability for so much more.