Quote Originally Posted by pepi View Post
Not sure it is possible to change the operating range on booster, this is the first time I have heard of that. There is a third option for low vac pressure and radical cams. That would be an electric vacuum pump, you would want one that cuts off at pressure. One more tip you will want to mount it under the car, they are about as noisy as an electric fuel pump.
I have a couple projects that i need to replace those electric vacuum pump systems i have tinked and dinked on those things from the day i installed them. They are poorly engineered, overrated, noisy, cumbersome - you name it. A poor solution to a problem and the sooner i get them into the trash the safer the car will be.
I'll continue looking into the operating range change of the booster and will let you guys know what i find.
Thanks for all the replies, it looks like the hydrosystem is the way to go.