So I went to the track for the first time ever, pretty nervous. The second time I run, I get through the end and going up on the bank I realize my power brakes are gone. I've got a 6 month old brake booster. Get back, check everything. Master cylinder is fine, no losing any brake fluid, BRAKE BOOSTER. It's out I guess, what else could it be? Also, last time it when out, I was getting on it. What causes that crap? I don't understand how ragging on it makes the brakes go out, just boggles my mind. I'm so pissed I'm rambling. Any advice is greatly appreciated, what am I doing wrong?
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1998 Mustang GT-SVO Headers-Steeda Tri-Ax-Flowmaster American Thunder Mufflers Dumped-Eibach Springs-Edelbrock Shocks-Tokico Struts-MM CC Plates-CAI
Where did you get your new brake booster from. I used to work for an auto parts sotre when I was in high school. What I learned was that I would rather have a used 6 month old part that I new was good, than a new one off the shelf. We got all kind of stuff that came back. So, if thats where it was from, it may not be your fault at all. Or if it was out of a junk yard... then well... it might not be your fault either.
Thats all I got, I have no idea why runnign the engine hard should cause your booster problems.
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2006 Mustang GT in Torch Red
C&L Intake, Evolution Performance Tune, Borla Axle Backs, Hurst Shifter, 4.10's, JBA Long Tubes, Prothane Engine Mounts, Steeda UDPs, FRPP Charge Motion Delete Plates
I don't think you have a problem with you booster. The booster is just a vacum canister its either bad or it isn't, it won't work sometimes and not others. What you have is brake fade. Very common when racing, basically the pads and rotors heat up to the point where they form a glaze. Once there glazed they don't work well.
Good brakes are a must- There are a ton of upgrades depends how much money how have. Upgradiing the fronts to larger rotort and the rear to disc is a big difference. The drum brakes on the rear are horrible. I'm in the process of upgrading my rears to a setup out of a 93 cobra, not easy to find but you can do the SN95 swap its pretty much the same. There is a thread I started that you can get some info on. A cheap upgrade is going to 73MM front calipers in the front they bolt right on. Get a set of GOOD pads EBC or Hawk. You'll be amazed at the difference just the 73MM calipers make.
Good Luck
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90 GT Vert- Flowmasters, BBK Cold , 9MM FR Wires MSD 6A Ignition, MSD Blaster, B+M shifter..3.73's in Rear. BBK Equal Length Shorty Headers. BBK off road X pipe.70mm TB, Alum FW. Alum DS. Upgraded Rebuilt T-5 w/295first. 93 cobra wheels w/nits. Elec Fan. AP pulley. Ford Racing Mini Starter. Energy Suspension Motor/Trans mounts. Trick Flow Intake, 30lb injectors and MAF, Steeda Alum Control Arms,Steeda Sway Bars, Steeda Sport Springs, Complete rear disc from 93 Cobra,
Dragracing Troubles 
