Power Brakes/Vacuum????

[ecgate]

Originally Posted by jocko

what musicman said - 18 is about what you want to have, minimum. I've known folks to say 16 was enough, but that is the very lower end. If you have a lopey cam, expect to be on the borderline of having sufficient vac to operate the booster. It is possible to add a vacuum accumulator that will help power the booster in addition to the minimal engine vac, but I never really wanted to hang one of these things in my engine compartment.

I've never seen or heard of a booster that requires less vacuum than another one. I suppose there could be minor variations based on design (dual vs single diaphragm, etc) - but nothing is manufactured/advertised as being able to operate with less vacuum that I'm aware of. That is why the vac accumulators are made.

How much vacuum do you pull with your lunati cam on the bb?

If I remember right, before I pulled everything apart the engine had about 15-17 vacuum. That is why Im debating what to do because I don't want to dump $200 on a booster setup and have the thing not work.