E46 M3 brakes
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e36er

Original Poster:

293 posts

203 months

Tuesday 9th July 2013
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A friend and I are hoping to join the CSCC Modern Classics series soon. We'll be running an E46 M3 in fairly standard form due to budget restraints. Can anyone give advice on brake setups that don't cost a fortune?

It's currently got HEL hoses, RBF600 fluid, standard discs and unknown £700 racing brake pads that are pretty awesome, but warp the discs fairly quickly. Could we get away with just using RS29s with standard discs? Is the Porsche 4 pot and CSL disc setup worth the money?

Cheburator mk2

3,182 posts

221 months

Wednesday 10th July 2013
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e36er said:
A friend and I are hoping to join the CSCC Modern Classics series soon. We'll be running an E46 M3 in fairly standard form due to budget restraints. Can anyone give advice on brake setups that don't cost a fortune?

It's currently got HEL hoses, RBF600 fluid, standard discs and unknown £700 racing brake pads that are pretty awesome, but warp the discs fairly quickly. Could we get away with just using RS29s with standard discs? Is the Porsche 4 pot and CSL disc setup worth the money?
A friend and myself came up with the Brembo/CSL discs product and we sold a ton of the brackets to people on the cutters forum. His CSL is still going strong 3 yrs later and so is my Z4MC. We both used EBC Red Stuff, which was perfectly adequate at the Ring. On more demanding UK circuits, you would want to go to RS29s or Carbonne Lorraine. I would also advice you go to CSL's discs upfront in any case. The Brembo set up would not reduce your net stopping distance, but will allow for repeated stomping on the brake pedal without fade. Also, the 4-pots offered better modulation over the single pots.

My brother's race M3 - search for phoenix yellow M3 build on reader's cars - utilises Brembo GT calipers with CSL disc upfront and is scary in its ability to shave speed.

We stopped making the bracket, as for us it was merely a way to upgrade our own brakes for free, but the rally-road alternartive is also quite good. If your budget allows you, I would upgrade the calipers/front discs...

HTH,

Alex

e36er

Original Poster:

293 posts

203 months

Thursday 11th July 2013
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Thanks for taking the time to post, Alex.

The problem we've got is not wanting to throw too much money at it, hence no APs, but at the same time it's a false economy going through 3 sets of discs by using decent pads. We're leaning towards Performance Friction discs, standard calipers and RS29s. I just hope the PF discs are tough enough.

Do you happen to know if the CSL discs are any tougher than the standard items?

Edited by e36er on Thursday 11th July 20:40

Cheburator mk2

3,182 posts

221 months

Friday 12th July 2013
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e36er said:
Thanks for taking the time to post, Alex.

The problem we've got is not wanting to throw too much money at it, hence no APs, but at the same time it's a false economy going through 3 sets of discs by using decent pads. We're leaning towards Performance Friction discs, standard calipers and RS29s. I just hope the PF discs are tough enough.

Do you happen to know if the CSL discs are any tougher than the standard items?

Edited by e36er on Thursday 11th July 20:40
I think with eagle-eye skills on eBay you may be able to upgrade all 4 corners of the car to 4-pot 996 Carrera/997 Carrera/Cayman S/Boxster S within a budget of £1.2k

The CSL front discs are not tougher than the standard discs, but simply bigger. Your total friction surface stays the same, but you increase the leverage by going bigger diameter. However, if you go down the route of fitting front CSL discs, you will need to get your hands on CSL calipers support brackets.

phatgixer

4,988 posts

271 months

Friday 12th July 2013
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Standard E46 calipers are powerful enough but lack feel.

Try and find a set of AP 6 pots with disks and fit RS29s. Will do 24 hours and feel great. Just make sure disks are the GP5000 pro or the fully floating versions as the road kit ones sold a while ago as a boxed set were very poor quality and would warp in 20 minutes at Oulton.

Alternatively, the standard ATE disks fitted are good enough as long as you change the hoses / fluid and fit decent pads. Otherwise fade city...

shim

2,050 posts

230 months

Sunday 4th August 2013
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just find some second hand APs ....... youll never spend better money on the E46, along with some decent race pads

phatgixer

4,988 posts

271 months

Monday 5th August 2013
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shim said:
just find some second hand APs ....... youll never spend better money on the E46, along with some decent race pads
I think a set of KW V3 springs / dampers may be as good a spend smile

shim

2,050 posts

230 months

Monday 5th August 2013
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phatgixer said:
I think a set of KW V3 springs / dampers may be as good a spend smile
that is so 2004 my old Polo playing chum!

e36er

Original Poster:

293 posts

203 months

Monday 5th August 2013
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We've got AST 5100s with spring rates the same as Kumho Cup cars (912lb fronts, forgotten what the rears are).

Still not sure what to do about the brakes, we'll try a 40 minute stint at Bedford using standard discs, RBF600, HEL hoses and RS29s. If that fails, we'll have to fork out for some APs. Really hoping they hold up ok!

Kozy

3,169 posts

240 months

Tuesday 13th August 2013
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Cheburator mk2 said:
I think with eagle-eye skills on eBay you may be able to upgrade all 4 corners of the car to 4-pot 996 Carrera/997 Carrera/Cayman S/Boxster S within a budget of £1.2k
Is that wise, using the braking system from a rear heavy car with a low CG on a front heavy car with a high CG?

AnonSpoilSport

12,955 posts

198 months

Friday 30th August 2013
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I ran Performance Friction discs and pads with standard calipers on an E36 EVO. Worked very, very well on track and road, not that much different to the way more expensive StopTech set ups on two other cars really.