Originally Posted by jayd_2
Is there that much difference between a 7" and 8" dual boosters power assist capability? I've got about 16 vacuum at idle will I gain much by switching from a 7" to an 8" dual booster?
You will gain about 100 psi by using the larger booster. Whether or not it will be enough to satisfy whatever the deficit is, I cannot say w/o more info.