E46 M3 AP Racing or Stoptech???

[wazadaza]

I've saved up my cash for my Brake Upgrade and need some advice, now I don't know whether to go for the well known 6 pot AP racing or the Stoptech's, does anybody have any opinion either way? Both look serious options but I'm leaning towards the AP Racing because of their rece pedigree. Welcome your thoughts.....

[ih8thisname]

I've got Stoptechs on mines, no complaints!

Uprated hoses/fluids are worth looking into with whichever you go for as well though.

Edited by ih8thisname on Sunday 8th March 13:20

[mmm-five]

AP or Movits (http://www.movit.de/)

[gareth h]

West tuning are in the process of developing a kit using porsche gt3 calipers, about the same cost as APs, might be worth having a chat with them.

[M3CD]

Lots of AP users on mtorque - not heard much negativity. My be worthwhile posting on there too?

[Nords]

I have APs all round on my CSL and they are superb. RS29 pads (not too squeeky on the road) allowed me to outbraking a Mk1 GT3 and elises into Goddards everytime. The only thing to watch for is AP discs can be a bit 'hit and miss' in terms of QA. I have Performance Friction front discs and std BM rears.

Thorney is now selling ALCON calipers which have a few improvements for racing. Your best bet is to look around for a set of second-hand APs, all four corners is best, but I know several M3 owners who say that just the fronts work fine with BM rear calipers.

[Nords]

I have APs all round on my CSL and they are superb. RS29 pads (not too squeeky on the road) allowed me to outbraking a Mk1 GT3 and elises into Goddards everytime. The only thing to watch for is AP discs can be a bit 'hit and miss' in terms of QA. I have Performance Friction front discs and std BM rears.

Thorney is now selling ALCON calipers which have a few improvements for racing. Your best bet is to look around for a set of second-hand APs, all four corners is best, but I know several M3 owners who say that just the fronts work fine with BM rear calipers.

[dan101smith]

You don't find your RS29s squeaky? Mine sound like I've crushed a gerbil, repeatedly.

[Nords]

Nope, only when they are really lightly on, below say 10 mph. Normal driving and they are fine. They have just had a thrash and heat cycling around Donington!

[gareth h]

Are they 18" rims? been thinking about picking up a set and powdercoating them black, any more pics?
Thanks
Gareth

[thehos]

AP

[RatBoy M3CS]

Heres mine on black 19's.... and black A/P's..





Agree with Nords.. I have lost count of how many red braked Porches I have reeled in at the end of the straights.... A/P's are good on RS29's...

Edited by RatBoy M3CS on Monday 9th March 20:33

[Nords]

gareth h said:

Are they 18" rims? been thinking about picking up a set and powdercoating them black, any more pics?
Thanks
Gareth

You asked for it! Std rear 18"s back and front...

[Nords]

[RatBoy M3CS]

Nords.. are you running 255's on that..? what geo on the front.. it looks a bit close for clearance but your getting away with it..?

Does this take all of the understeer out OK...?

[Nords]

Std 18" M3 wheels back and front 265/35 ZR18 with Dunlop DZ02G. It is on Intrax suspension so a bit lower but that was road camber of about neg 1.5 degrees. Didn't rub at all...

One ones on the right...


http://www.camskill.co.uk/products.php?plid=m12b25...

[Nords]

They had been used before on track but this is after my Donington day, approx 50 laps?

Back left


Front left


Front right


Rear right

[RatBoy M3CS]

Well that didnt seem to scrub the sholders out too much did it.. my exp of stock geo on track was 2 scrap front tryes in 2 hours.. but on -2.5fr -1.75rr neg its much better.. do you rate these tyres over cups..? did you back to back them..? I run cups on track usually .. but I'm always looking for something road legal and better..! shame not much comes in a 19" ..!

Edited by RatBoy M3CS on Tuesday 10th March 21:06

[Nords]

Sorry, I haven't run the cups yet. I need to replace one of those fronts! People who have say that they are not quite as good as cups, a little like R888 and they are road legal too. Camskill have them for £155 a corner on that special offer.... but only in 18"s

[RatBoy M3CS]

OK... I tried a rear CSL rim on the front of mine.. and didnt get away with it.. my best guess is you need 3.5 Degrees neg on the front end to get the clearance you need to do this..

How have you found the front end of the car now.. zero low speed understeer..?
How is it through 75-100 mph bends.. neutral or oversteer biased now..?