Brakes again - a warning

[V8Cerbera]

Okay, here's a warning - DON'T put EBC RedStuff in the rear calipers of your cerb. They CANNOT be made squeel-free as they are actually too good and possess too much bite.

I'm having to go in on Monday to have mine downgraded to GreenStuff (front staying on reds as those are fine).

[TT Tim]

RUBBISH!

Been using Red in the rear for nearly 2 years without problem, on track and road.

Tim

Edited to add this may be a problem associated with your car but may not effect everyone else.

Edited by TT Tim on Saturday 10th March 20:38

[A1 paint sprayer]

hi i had green stuff on rear and could not stop them squeeling so whent for genuine and have not squeeled since.

[daver]

V8Cerbera said:

Okay, here's a warning - DON'T put EBC RedStuff in the rear calipers of your cerb.

Here's a warning: whatever you do, make sure you use the SAME compound at both ends of your car or squealing will be the last of your problems!

[toady1]

whats wrong with a bit of race car style squeal!

[davidn]

daver said:

V8Cerbera said:

Okay, here's a warning - DON'T put EBC RedStuff in the rear calipers of your cerb.

Here's a warning: whatever you do, make sure you use the SAME compound at both ends of your car or squealing will be the last of your problems!

I don't get it. I've no idea what's in the back of mine, I put Mintex 1144's in all round and they squealed like crazy but stopped well. Put it into Leven and they put their secrect no squeal rears in and Greenstuff fronts. Hated the Greenstuff so went back to the Mintex on the fronts. I'm sure the rears aren't Mintex but it didn't bother me. I figure the brake bias is heavily toward the front so the pads won't be doing anywhere near the same amount of work.
I could understand it if say you uprated the braking capacity of the rears with bigger disks, more powreful calipers and left the fronts alone, every corner would be a potential handbrake turn. But you're never going to get the rears to out perform the fronts given the caliper design and pad size difference of the standard set up. I don't notice any differnce between a matched set front to rear and my current set up. But if my next post reads I wrote my car off because the back snapped out for no reason then please make my humble pie warm at least.
David

[daver]

davidn said:

I figure the brake bias is heavily toward the front so the pads won't be doing anywhere near the same amount of work..... But you're never going to get the rears to out perform the fronts given the caliper design and pad size difference of the standard set up.

You're half way there. You need to factor in operating temperature tange of the pad material though. Red Stuff might have great bite over 50deg C but it doesn't when it's stone cold.

Let's just suppose you had Red Stuff in the front (for all the good front bias reasons above) but hadn't changed your Mintex rears. The first time you need to lose a bit of speed and your pads are cold you're going to have to press the middle pedal quite hard. The car starts slowing down, the rear unweights, and the Mintex rears that are perfectly happy to be cool then proceed to lock up the rear wheels for you.

Don't ask me why I know this.

[grahamn]

[quote=daverLet's just suppose you had Red Stuff in the front (for all the good front bias reasons above) but hadn't changed your Mintex rears. The first time you need to lose a bit of speed and your pads are cold you're going to have to press the middle pedal quite hard. The car starts slowing down, the rear unweights, and the Mintex rears that are perfectly happy to be cool then proceed to lock up the rear wheels for you.

Don't ask me why I know this.

[/quote]

Go on then how do you know this

[davidn]

daver said:

davidn said:

I figure the brake bias is heavily toward the front so the pads won't be doing anywhere near the same amount of work..... But you're never going to get the rears to out perform the fronts given the caliper design and pad size difference of the standard set up.

You're half way there. You need to factor in operating temperature tange of the pad material though. Red Stuff might have great bite over 50deg C but it doesn't when it's stone cold.

Let's just suppose you had Red Stuff in the front (for all the good front bias reasons above) but hadn't changed your Mintex rears. The first time you need to lose a bit of speed and your pads are cold you're going to have to press the middle pedal quite hard. The car starts slowing down, the rear unweights, and the Mintex rears that are perfectly happy to be cool then proceed to lock up the rear wheels for you.

Don't ask me why I know this.

Oops, missed your reply on this, but yes that makes a lot of sense.
Cheers
David