Slow old poop
15+ Year Contributor
- 707
- 7
- Jul 24, 2005
-
Cedar Rapids,
Iowa
I have a 90 Eclipse GSX with StopTech brakes, running 21 psi boost.
After every blast down a straight under boost, my pedal goes soft, and needs to be pumped twice to get hard. It feels exactly like I boiled the fluid, but that's not the problem. Two weeks ago, it did the same thing in the rain at MidAmerica. Once it's up, I have plenty of brake, and the brakes don't fade, but it cuts a couple of seconds off my lap times with all the pumping.
We have flushed the system and replaced it with Motul.
Pads are good, with new rotors.
Thinking that maybe the big boost was overcoming the stock check valve, we added a crank vent check valve to the system.
We ran it again at Gingerman this weekend, and had the exact same problem.
Any other road racers have this problem?
Rich/slow old poop
After every blast down a straight under boost, my pedal goes soft, and needs to be pumped twice to get hard. It feels exactly like I boiled the fluid, but that's not the problem. Two weeks ago, it did the same thing in the rain at MidAmerica. Once it's up, I have plenty of brake, and the brakes don't fade, but it cuts a couple of seconds off my lap times with all the pumping.
We have flushed the system and replaced it with Motul.
Pads are good, with new rotors.
Thinking that maybe the big boost was overcoming the stock check valve, we added a crank vent check valve to the system.
We ran it again at Gingerman this weekend, and had the exact same problem.
Any other road racers have this problem?
Rich/slow old poop