AP Racing 4-pot still squeeking at 5000km for ExigeS240?!

[BadtZ]

As titled, my car has the stock AP racing 4-pot they supplied for a S240
but my brakes are still squeeking every time i press on it and when coming to a stop

i am at 5000km on the odo alrdy, is this normal?
the pads doing alright?
Aft some drive in the moutain roads(spirited driving) my vanes on the rotor will always be filled completely with brake dust.

some thoughts?

thanks!

btw the car will sometimes make "wwwwoooommmm" sound cuming from the back near complete stop......thoughts?

[shinoo]

Yes, they come with RS14 Pagids which are a track focused pad. If you want something quieter try the Pagid Blues: Click HERE
These are a better all around pad. Good on the street, easy on rotors and occasional track use.

[EricH]

Weird, mine are silent.. both on street and track. Did you break them in properly?

[BadtZ]

Originally Posted by shinoo

Yes, they come with RS14 Pagids which are a track focused pad. If you want something quieter try the Pagid Blues: Click HERE
These are a better all around pad. Good on the street, easy on rotors and occasional track use.

So these will squeek no matter what? i hope i can finish the pads right now then change into Blues

Originally Posted by EricH

Weird, mine are silent.. both on street and track. Did you break them in properly?

Yeah.. But i think i went too soft on the brakes in the break in period
But I would always go up the moutain road and goes pretty crazy on these things...I am not sure what the problem is
Yours 240?

[shinoo]

Originally Posted by BadtZ

So these will squeek no matter what? i hope i can finish the pads right now then change into Blues

The RS14s should last a long time. The noise just reminds you that you bought a proper sportscar - not some luxury sporty car.

[Stale_Hotdog]

Did you follow the brake bedding procedure? The S240 shares the same AP brakes as the cup 255.

Originally Posted by Jack View Post
Here you go.....


'Big Brake Kit' Bedding-In Procedure

Exige S models specified with the 'Performance Pack' and other Elise/Exige variants fitted with 4-piston front calipers, require a brake bedding-in procedure to be followed before the brakes are used heavily. This procedure should also be applied if and whenever new brake pads and/or discs are fitted.

WARNING; This procedure should be carried out only on a closed track or deserted straight road, paying appropriateconsideration to any other track or road users. An observer passenger should be carried to assist in this regard.

The purpose of brake pad bedding is to:
- Transfer a layer of friction material onto the disc faces to achieve maximum performance;
- Stabilise compressible materials to avoid a spongy pedal;
- Boil off volatile elements in the friction compound;
- Align the pad and brake disc surfaces for full contact.
If the pads are not bedded in correctly, or are used aggressively straight after fitting, pad glazing may occur. This condition results from resins in the pad material crystallising on both the pad friction surface and the brake disc surface, producing brake judder and vibration. Also, rapidly escaping volatile elements and moisture from the resin, in seeking an immediate escape route
out of the friction compound, can create small fissures that can lead to cracking and chunking of the material. The potential for disc overheating and distortion will also be reduced by the correct bedding-in procedure.

Bedding Procedure;
a) To generate some heat in the discs and pads, perform 4 to 6 brake applications with medium pedal pressure from around 70
mph (110 km/h) to 40 mph (60 km/h), allowing around 30 seconds between events.
b) Immediately after this procedure, carry out one brake application with heavy pedal pressure, without activating the ABS, from around 70 mph (110 km/h) to 30 mph (50 km/h).
c) Perform 3 or 4 brake recovery applications to clean the discs and pads, using light pedal pressure from around 70 mph (110 km/h) to 40 mph (60 km/h).
d) Repeat (b) and (c) a further 2 or 3 times. The brakes may now be considered fully bedded.

New Pads on Used Discs
If new brake pads are to be fitted on used discs, it is recommended to chamfer the leading edges of the pad to allow optimum bedding. The chamfer should be about 45 degrees and 1 to 2mm across.

[BadtZ]

Originally Posted by shinoo

The RS14s should last a long time. The noise just reminds you that you bought a proper sportscar - not some luxury sporty car.

+1, but just the sounds are sometimes annoying, and usually i have a passenger so when the sound comes up.

and the sound coming from the back ARE very unpleasent. Not squeek but...."woooommmm" iono


Hotdog, Yeah i followed the procedure pretty much I have done this around 4 times doing the same procedure... (on Cypress, the skiing mountain near by which got straights and some huge turns
Usually will break from 100km/h to 30, and 160 to 80; going back and forth like this
and after every run, the car will usually squeek even louder
dont know why

[mnsayer]

I have an S240 and it does the same thing...

[Noel]

If it's any consolation, the blue Pagid RS42s on this BBK also squeal, albeit a different squeal than the black Pagid RS14s.

If you don't track the car much, better to run blue Pagids instead. They're more optimum for road use, even though they're somewhat still a race compound pad, less aggressive.

[shinoo]

Originally Posted by Noel

If it's any consolation, the blue Pagid RS42s on this BBK also squeal, albeit a different squeal than the black Pagid RS14s.

If you don't track the car much, better to run blue Pagids instead. They're more optimum for road use, even though they're somewhat still a race compound pad, less aggressive.

Correct. We are running the Blues on Project Nirvana now and an occasional squeal is reality.