Posted by casebro on Wednesday, October 23, 2002 at 2:18PM :
In Reply to: Distributor question posted by War Eagle on Wednesday, October 23, 2002 at 1:32PM :
At partial throttle you have less mixture in the cylinders and lower pressure, so you can run more advance. A vaccuum advance does this automatically, so you should get better gas mileage. However, in these underpowered old flatfenders you need full throttle a LOT. In a modern world, the only time you don't use a vac. is in full race operation- like drags. Personaly, I run a vaccuum advance.