I did, I had some vaccum leaks which I have yet to correct. My car is down, but I was told that if the system is set up properly, with no leaks I wouldn't need one. I think I'm going to continue to use it, as insurance, can't hurt...
I never needed one. You can buy them through Jegs and Summit.
The key to fast times on the autocross course is to be smooth with the gas and brake pedal. If you find your self "pumping" or "stabbing" either pedal than your doing something wrong. With that said than you should have plenty of vacuum for braking.
Hi Eric! Well you personally have seen me in my old GN on the autocross :biggrin: and It also had the vacuum brakes. It had good brakes while under boost!
I'll take a look at your car if you want when you come down here for our RTTH4 event.
I just done the vacuum conversion on my new "T" also, simply because I liked vacuum brakes much better. My new car I can even hold 7lbs boost on the line with them!