SQUEALING AP'S

[A57 HSV]

Anyone actually discovered a longterm solution to stop or at least reduce the brake squeal from AP Racing brakes? I was going to phone AP next week, but thought I'd ask here first.
I had 4pot AP's on a previous car & they were also noisy, but these 6pots are really loud. I've tried the normal method of coating the back of the pads, with various different copperslip type products.

[V8HSV]

Sorry to hear that, I have no squeal issues to date on 30,000 miles and just fitted 3rd front pad set. Admittedly I keep a hose beside the car and douse the dust away quite regularily from the calipers.

[anonymous-user]

Yes I have the same problem now and again. Worse when you've been in stop / start traffic for a while and are only using the brakes lightly. Found that coppaslip did improve the problem a bit .... but has not cured it totally.

This is what LSV told me:

The six pot fronts have 3 different sized pistons ... small / medium / large ..... apparantly the problem is caused by the smallest piston oscillating during light braking. Apparantly some springs (porsche sourced) need to be fitted inside the smallest piston to set a bit of pressure behind it and hold it against the disc a bit to stop the squealing.



>> Edited by anonymous-user on Sunday 3rd April 20:29

[A57 HSV]

Thanks, not that keen on messing about with the calipers unless AP themselves want to do it!
They squeal if clean or dirty.
I'm so used to it, I don't really mind, but this w/end the weather was really nice & driving with the window down made me reallise just how noisy they are.
Still love 'em though!

[pomona]

What grade pads are you useing?

[V8HSV]

I'm using Ferodo Vanquish ones

[pomona]

Ferodo DS2500 are the pads used by the OEM,and Pagid RS pads are also recommended,but squeal shims must be fitted with Pagid.This info supplied to me from brake manufacturer.

[A57 HSV]

Using Ferodo but not sure which type. Still on the original set after almost exactly 2 yrs(no track days since fitting!).
Just spoke to Mark who tells me LSV now use a slightly harder Ferodo pad, which I guess is what Will has.

>> Edited by A57 HSV on Monday 4th April 11:50

[pomona]

From my experience the harder you go the more squeal you get