AP Disc replacements????

Lee13 · 12-12-2009, 04:39 PM

Hello guys I need to replace my AP discs on the front. Pretty disappointed with the AP ones as they still look like they have loads of life left in them but at Cadwell yesterday they were humming like buggery then started to warp with more heat. I left them to cool and the warping went but the terrible humming noise is still there. Any suggestions???? I'm also thinking while Im on to buy some bells for the rear and change them from the standard CSL discs. I have the AP calipers front&rear. Cheers guys

s.mac · 12-12-2009, 04:56 PM

Quote:

I'm also thinking while Im on to buy some bells for the rear and change them from the standard CSL discs. I have the AP calipers front&rear

cant do it

performance friction are the only rear set up that comes with a separate bell, the AP are the same floating disk as the OEM disks. Most people seem to put the PF disks on the AP front alloy bells when replacing the AP disks

DuncanR · 12-12-2009, 07:23 PM

Will the front AP's not take a light skim Lee from your locally friendly cash job engineering firm?

Lee13 · 12-12-2009, 10:36 PM

I will probably do that as a matter of course. I just don't want another trackday cut short next time round. It's got to be worth a try for few quid. Cheers for the thoughts

englebert · 12-12-2009, 10:56 PM

What pads are you using?

**shimmy** · 13-12-2009, 10:42 AM

Take out the ferrodo ds2500

breeze · 13-12-2009, 11:04 AM

Quote:

Originally Posted by shimmy

Take out the ferrodo ds2500

Exactly what I was thinking - what pad are you running?

It is unlikely that you have warped the disc and far more likely that you have pad deposits that have built up from an overworked pad.

AP discs do crack but if they look like they have a lot of life left in them I would be tempted to run a hard pad like an RS29 to try and clean up the surface first.

Lee13 · 13-12-2009, 04:51 PM

Already got the pagid yellows in chaps.... Bought them as soon as I got the car. I might buy the AP kit that converts them to fully floating rather than just standard 2 piece

s.mac · 13-12-2009, 04:57 PM

Quote:

I might buy the AP kit that converts them to fully floating

?

Lee13 · 13-12-2009, 05:03 PM

The AP discs are 2 piece yes.... Well a kit can be purchased to make them fully floating which will help with heat and warping. I believe the kit is £100

12-12-2009, 04:39 PM	#1
Lee13 S2 - Picking it up Join Date: Jul 2009 Posts: 46 Casino cash: $1183	AP Disc replacements???? Hello guys I need to replace my AP discs on the front. Pretty disappointed with the AP ones as they still look like they have loads of life left in them but at Cadwell yesterday they were humming like buggery then started to warp with more heat. I left them to cool and the warping went but the terrible humming noise is still there. Any suggestions???? I'm also thinking while Im on to buy some bells for the rear and change them from the standard CSL discs. I have the AP calipers front&rear. Cheers guys

12-12-2009, 10:56 PM	#5
englebert S5 - Full Throttle Join Date: Jun 2008 Location: Kent Posts: 397 Casino cash: $705	What pads are you using? __________________ '03 SG CSL - SOLD Making do with a CSL replica, 1M and E90 M3.

12-12-2009, 07:23 PM	#3
DuncanR CSL Register Uber-poster! Join Date: Sep 2009 Location: Olney, Bucks Posts: 3,735 Casino cash: $9984	Will the front AP's not take a light skim Lee from your locally friendly cash job engineering firm?

12-12-2009, 10:36 PM	#4
Lee13 S2 - Picking it up Join Date: Jul 2009 Posts: 46 Casino cash: $1183	I will probably do that as a matter of course. I just don't want another trackday cut short next time round. It's got to be worth a try for few quid. Cheers for the thoughts

13-12-2009, 10:42 AM	#6
shimmy CSL Register Uber-poster! Join Date: Apr 2008 Location: Uk Posts: 14,646 Casino cash: $43909	Take out the ferrodo ds2500

13-12-2009, 04:51 PM	#8
Lee13 S2 - Picking it up Join Date: Jul 2009 Posts: 46 Casino cash: $1183	Already got the pagid yellows in chaps.... Bought them as soon as I got the car. I might buy the AP kit that converts them to fully floating rather than just standard 2 piece

13-12-2009, 05:03 PM	#10
Lee13 S2 - Picking it up Join Date: Jul 2009 Posts: 46 Casino cash: $1183	The AP discs are 2 piece yes.... Well a kit can be purchased to make them fully floating which will help with heat and warping. I believe the kit is £100