Fireball,

What you're talking about sounds like pad knockback I've felt it also at Grattan but not RA it's caused by the suspension flexing in the turns allowing the rotors to push the pads back in some. After about 1/2 day I found exactly where it was happening and gave the brakes a small tap before the braking area. Low vacuum would just make the pedal hard.

 

Two piece rotors and a good set of padsFTW! I have yet to have my fluid boil and i have almost cooked the paint off of my calipers!

 

100% agree with this. This is a very common thing to have happen on rally stages or at hillclimbs where its bumpy and the first time it happens it can cause a huge oh s!it moment. Maybe I should see if "Depends" wants to sponsor my car. Only cure I've found for this is to move your left foot over on the brakes for a gentle push to 'prime' them while your right foot is still pinned. Makes them nice and hard for when your right foot moves back onto the brakes.

Dave

 

...after watching the 2nd video of the pikes peak race I have to ask. Did you have to get a seat custom made so you could fit your ***** in it?

 

MidO is hard on brakes. It has some sections where you build a lot of speed and then have to stand on it. As such you are going to eat some parts. I do not like the HP line at all for the track and I am sure Hawk would agree.

I know that I had a LOT less problem with heat when I went to Racingbrake 2 piece floating rotors. You may not have to do this but you should consider some new pads and a bleed with the Motul.

 

Get 'em checked out to be certain there isn't some thing wrong.

Goood fluid & bleeding
proper pads
maybe SS lines if OE are getting worn
keep your foot off the pedal "until" needed

You're solid

everything that's been said before except the e-*****

 

The right caliper is darker normally because it sits behind the oil cooler, not because of corner loading. I never experienced pad knockback at MO (even abusing the curbing), and you didn't have enough laps in the session to have the pads in general overheat and boil the fluid. I still think that something is up with the LF caliper, which caused it to overheat and boil the fluid.

 

FWIW, I have had pad knock at Mid Ohio particularly enteriing the turn 7 braking zone. It's usually mild and I've only had to compensate with a left foot tap on 1-2 occasions. My fluid has never boiled at that track though (and I am without a ducting kit, which I'm hoping to change sometime before next year). For comparison, I have a stoptech BBk with Hawk DTC 70 fronts and DTC 60 rears.

Will you be at MO in August Greg? I have signed up for TTA which will be my only TT event this year in the EVO. I feel so bad neglecting it.

_____
Jason

 

was made to Fireball not the OP

 

What are you calling T-7? End of the back straight? I will be there friday-sunday, look me up either at the NASA trailer or the Pace car.

 

Sounds exactly like it. Now just to find where... there's a lot of hard turning on that track.

 

said I think it's high side loads combined with a bumpy surface that gets you.

 

Am I the only one still with red (not brown) calipers who has seen a lot of track time? My car must have been built on a good paint day. DTC pads and ATE fluid. No problems with fade or loss in feel over the course of a session, but I change the fluid every couple events. $10/can is cheap insurance.

 

Mine were at the most a light Maroon until I switched to PF-97 pads.

I had a helluva time getting used to that pad, since I went from the "OMIGOD I need to stomp on the brake pedal with the force of a freight train" HP+ pad to the "If I don't float like a butterfly, I will trigger ABS" PF-97 pad, which has equalled super dark calipers.

l8r)

 

Hmm, high side loads... Carousel at Road America anyone?



Now that I think about it, a lot of times I get that mush pedal through the kink (right after the carousel) and turn 12, which follows the kink.

I'll have to play with tappin the pedal as I'm coming out of the carousel.