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Brake fade, how to prevent it........

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Old 04-21-2011, 08:45 AM
  #31  
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Originally Posted by Veloce Raptor
Paolo, PSM on or off?
Good call!!!!
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Old 04-21-2011, 08:51 AM
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Originally Posted by RickBetterley
That's an 'oh crap' moment, that's for sure; should never have happened as you had time to cool the pads after turn 1.
I'm guessing thin pads as suggested by others. How much pad is left?
Never happened with this car before, right?
Brakes were bled before event? Bleeders snugged down tight? No fluid leakage?
Bad place to lose brakes...you did well to stay out of the wall.
Brakes were bled just before event, pads started @85% on first day of event.



Originally Posted by Veloce Raptor
Paolo, PSM on or off?
On that run the PSM was on, would that make a difference?
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Old 04-21-2011, 09:13 AM
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IMO, yes it would. PSM really significantly uses the brakes on track much more than we perceive. Overheats them on occasion & also causes premature pad wear.
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Old 04-21-2011, 09:19 AM
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Originally Posted by Veloce Raptor
IMO, yes it would. PSM really significantly uses the brakes on track much more than we perceive. Overheats them on occasion & also causes premature pad wear.
One more reason for shutting PSM off next time.....
Thanks for the advice Dave......
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Old 04-21-2011, 09:23 AM
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Originally Posted by CWhaley
The difference between LRP and NJMP is the amount of "Cool Down time" between usage. You should not reach the 596 Temp of the Oranges at NJMP unless you are dragging the brakes around the whole track.... While LRP will hit that much easier from with those silly sub minute laps.
Not to bifurcate the thread, but both tracks at NJMP are way more intensive on brakes than LRP.
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Old 04-21-2011, 09:24 AM
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Originally Posted by FredC
bifurcate
the MOUTH on you !!!!!!!!!!!
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Old 04-21-2011, 09:54 AM
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did you get into the abs?

people have had trouble with the abs module on these cars. usually when they are fully track prepped however.
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Old 04-21-2011, 10:00 AM
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Originally Posted by J richard
stop using them so much...
+1

Also, Try the pagid yellows.
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Old 04-21-2011, 10:11 AM
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Originally Posted by FredC
Not to bifurcate the thread, but both tracks at NJMP are way more intensive on brakes than LRP.
Bifurcate? Fred, another Periodontist?
Your statement is very true, LRP is almost an oval as far as brakes go.
But the NJ tracks allow plenty of cool off time.

As VR would say; "less brake, more gas".
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Old 04-21-2011, 10:25 AM
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Originally Posted by BostonDMD
Stock Cayman S , with stock rotors and pagid orange pads with SRF fluid......

Last lap of a DE session, was pushing the car pretty hard.

The fade was so bad I couldn't slow down enough to turn and I had to almost drive her into the wall, before I was able to make the turn.....

never happened in my race car......

advice appreciated......
with stock pads brakes were very hot after turn 1, turns 2ab are slow so thy did not cool off yet so very late braking before turn 3 causes fade. i had same problem with stock pads, with pagid yellows it was much better. plus turn 3 is a slow turn, so if you not sure about your brakes - start braking a bit yearlier than it feels 'right' before turn 3 and brake less hard.
overall solution - pagid yellows and cup car ducts in front.
http://www.suncoastparts.com/product...7brakeupgrades
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Old 04-21-2011, 10:31 AM
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Originally Posted by BostonDMD
On that run the PSM was on, would that make a difference?
Like VR said, it would make a large difference. Everytime that little PSM light comes on, the car is on the brakes. At a track like NHMS, it probably adds .25-.5 laps worth of braking effort (and heat) per lap.
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Old 04-21-2011, 10:34 AM
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Originally Posted by Matt Romanowski
Like VR said, it would make a large difference. Everytime that little PSM light comes on, the car is on the brakes. At a track like NHMS, it probably adds .25-.5 laps worth of braking effort (and heat) per lap.
PSM operates rear brakes only, doesn`t it? or does it work with front brakes too?
i beleive severe fade is usually a result of front brakes overheat.
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Old 04-21-2011, 10:41 AM
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Originally Posted by gums
But the NJ tracks allow plenty of cool off time.
This was my point! If you are over heating your brakes at either of the NJ tracks you are riding them !
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Old 04-21-2011, 10:41 AM
  #44  
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Originally Posted by Matt Romanowski
Like VR said, it would make a large difference. Everytime that little PSM light comes on, the car is on the brakes. At a track like NHMS, it probably adds .25-.5 laps worth of braking effort (and heat) per lap.
What Matt said is right. Unless you have a LSD, most 911's and probably the Cayman, tries to spin the RR tire climbing the hill. with the PSM on, that brake is being pulsed all the way up the hill.
Don't look down at the dash to see if the light is flickering, it's an easy way to drive off. Trust me!!! if you're pushing hard then the PSM was working and adding a ton of heat to rear brakes. It may not be the only issue, but it all adds up.
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Old 04-21-2011, 10:55 AM
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Originally Posted by CWhaley
This was my point! If you are over heating your brakes at either of the NJ tracks you are riding them !
your point also made an erroneous comparison to LRP ;-)
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