Superformance Brakes (or not)

rdorman · #1 (**permalink**) 04-16-2008, 06:48 AM

I don't know why in the world they use a vacuum booster on these cars in the first place. SPF can just send me a car and I will design two systems one for the basic cruiser/weekend warrior and one for the racer. I know a former F1 driver that would enjoy filling the left seat and much will change. Of course, I get to keep the car for my time and expense

For the rest of you, listen to Dennis... the guy knows what he is talking about.... and I would suspect he is on the right course.

Bill Wells · #2 (**permalink**) 04-16-2008, 10:28 AM

Rich, the vacuum boosters seem to be needed with the 427R ROUSH engines, not necessarily a SPF problem. And, apparently not all 427R engines ? and NOT the 402R engines . The cam in the 427R seems to cause low boost at low rpm's . Hence causing havoc with the power brake system as rpms decrease . This may be an isolated case not related to that , but others have reported the can as the fix with a 427R as my friend did. Bill

rdorman · #3 (**permalink**) 04-16-2008, 10:40 AM

Sorry I wasn't clear Bill. Not suggesting the problem is with SPF alone. Heck, when I bought my car I planned stops with a calendar (not a SPF)! I question putting power assist brakes on these cars period.... particuarlly a vacuum assist. If I was going to spec an assist system for a car that I knew some folks would put some wild engines in... it certainly would not have been a vacuum assist. I think SPF is a very good company with some strong personel assets and will get it worked out! But, if they want to send me a car........

patrickt · #4 (**permalink**) 04-16-2008, 10:38 AM

Quote:

Originally Posted by rdorman

I don't know why in the world they use a vacuum booster on these cars in the first place.

I read this as asking "why do you need power brakes in a Cobra to begin with?"

rdorman · #5 (**permalink**) 04-16-2008, 10:42 AM

Quote:

Originally Posted by patrickt

I read this as asking "why do you need power brakes in a Cobra to begin with?"

That is correct. Refering to the power assist not vacuum pumps, canisters, etc.

patrickt · #6 (**permalink**) 04-16-2008, 10:56 AM

Quote:

Originally Posted by rdorman

That is correct. Refering to the power assist not vacuum pumps, canisters, etc.

Coincidentally, in the last couple of days I've posted pics of both my front and rear brakes in different threads. The fronts are Sierras on 12.2" rotors, the rears are 12" rotors with the outboard PBRs that went on the 94-97 Camaros. It's really a pretty simple, straight-forward system.