Vacuum Advance and why to use it on the street

[Supergas990]

I don't have dog in this fight, but I understand what Hemicolt is saying. It makes sense and works very well, especially under specific circumstances.

On our 582ci race motor we ran our motor with the advance locked at 36 degrees. This thing was a beast 4.6 bore, 4 3/8 stroke, long rod BBC. Dart 360s and 14.5:1 compression (Motor makes 1,000hp straight up).

At first we had a handful to get it started without the engine kicking back. That was easily solved by adding a retard module for starting only. After getting it to fire, this motor needs the time I can give it to cleanly/completely burn all the fuel getting dumped into it.

Vacuum advance is nice for my 327 street motor, but when you're trying to burn an execessive amount of fuel you need to give the motor time to work.

Blair