M2 Brakes - again...
Discussion
Had my first track day at the weekend, whilst I thoroughly enjoyed it, the brakes need some work.
The pedal went soft on me a few times, so as a minimum I'm going to get some Castrol SRF in there.
The next issue is that I have been left with a rumble/vibration when braking with anything other than light pressure. I am thinking this is pad deposits on the discs due to me not cooling them off enough at some point?
I've tried a few heavy stops to clean them up but it doesn't seem to have had much effect. Any thoughts on if they will clean up with more miles?
I'm thinking I may go for a different brake pad as I plan on doing a few more track days. The car is very much a daily driver though so they need to be civilised.
I want a pad that doesn't require lots of heat before becoming effective.
I want a pad that doesn't squeal horrifically.
Any suggestions?
I know BMW do an M Performance pad and am waiting for a price on these, what else should I consider though?
The pedal went soft on me a few times, so as a minimum I'm going to get some Castrol SRF in there.
The next issue is that I have been left with a rumble/vibration when braking with anything other than light pressure. I am thinking this is pad deposits on the discs due to me not cooling them off enough at some point?
I've tried a few heavy stops to clean them up but it doesn't seem to have had much effect. Any thoughts on if they will clean up with more miles?
I'm thinking I may go for a different brake pad as I plan on doing a few more track days. The car is very much a daily driver though so they need to be civilised.
I want a pad that doesn't require lots of heat before becoming effective.
I want a pad that doesn't squeal horrifically.
Any suggestions?
I know BMW do an M Performance pad and am waiting for a price on these, what else should I consider though?
5678 said:
Had my first track day at the weekend, whilst I thoroughly enjoyed it, the brakes need some work.
The pedal went soft on me a few times, so as a minimum I'm going to get some Castrol SRF in there.
The next issue is that I have been left with a rumble/vibration when braking with anything other than light pressure. I am thinking this is pad deposits on the discs due to me not cooling them off enough at some point?
I've tried a few heavy stops to clean them up but it doesn't seem to have had much effect. Any thoughts on if they will clean up with more miles?
I'm thinking I may go for a different brake pad as I plan on doing a few more track days. The car is very much a daily driver though so they need to be civilised.
I want a pad that doesn't require lots of heat before becoming effective.
I want a pad that doesn't squeal horrifically.
Any suggestions?
I know BMW do an M Performance pad and am waiting for a price on these, what else should I consider though?
Mate had exactly the same. Got the rotors replaced under warranty for not being fit for purpose and put the M Performance pads in. Problem solved. I'd go this route to start and if you need further improvement look at Big Brake kits .... 👍The pedal went soft on me a few times, so as a minimum I'm going to get some Castrol SRF in there.
The next issue is that I have been left with a rumble/vibration when braking with anything other than light pressure. I am thinking this is pad deposits on the discs due to me not cooling them off enough at some point?
I've tried a few heavy stops to clean them up but it doesn't seem to have had much effect. Any thoughts on if they will clean up with more miles?
I'm thinking I may go for a different brake pad as I plan on doing a few more track days. The car is very much a daily driver though so they need to be civilised.
I want a pad that doesn't require lots of heat before becoming effective.
I want a pad that doesn't squeal horrifically.
Any suggestions?
I know BMW do an M Performance pad and am waiting for a price on these, what else should I consider though?
ftypical said:
EBC Yellow Stuff?
Ran EBC once years ago, had a pad come away from the back. Won't use them again.saveloy said:
Pagid RS29 or RSL29. Along with the Castrol SRF you'll have no future issues.
Kyri
Risk for noise is too high really, plus I want something that works well from cold as the wife drives the car now and then.Kyri
Far Cough said:
Mate had exactly the same. Got the rotors replaced under warranty for not being fit for purpose and put the M Performance pads in. Problem solved. I'd go this route to start and if you need further improvement look at Big Brake kits .... ??
Was it much of a battle to get them changed? RS29s. IMHO these are a wonder pad. They work on the road without being useless and they work on track.
They are very resiliant on track. Short of riding them 24/7 they will be spot on. They were fine for us in a Rent-A-Race-Car driven by 6 people of varying talents in a day doing around 18 laps around the 'ring during a DN even (DN16). I can't say I remember them squealing but it was over a year ago now.
The same day I went around with a bloke in an E46 with those pads in his stock braking system. The car was spot on with them TBH!
They are very resiliant on track. Short of riding them 24/7 they will be spot on. They were fine for us in a Rent-A-Race-Car driven by 6 people of varying talents in a day doing around 18 laps around the 'ring during a DN even (DN16). I can't say I remember them squealing but it was over a year ago now.
The same day I went around with a bloke in an E46 with those pads in his stock braking system. The car was spot on with them TBH!
Steve Rance said:
Castrol SRF and pagid yellows are all you need. The discs and Calpers are fine as they are.
Thanks Steve. SRF is a definite. How are the yellows in terms of noise? This is my main concern as it’s a daily driver first and toy second. Edited by Steve Rance on Tuesday 3rd April 18:55
If you tend to cover the brake peddle, brake lightly and stay on the brakes for longer than needed, you will get pad squeal. If you brake more clinically - ie one harder application - then yellows will be fine. I have yellows fitted to my cars and get no squeal. When my partner drives any of them she complains of brake squeal all of the time. It’s easy enough to clear but a real pain if your technique doesn’t suit them.
Steve Rance said:
If you tend to cover the brake peddle, brake lightly and stay on the brakes for longer than needed, you will get pad squeal. If you brake more clinically - ie one harder application - then yellows will be fine. I have yellows fitted to my cars and get no squeal. When my partner drives any of them she complains of brake squeal all of the time. It’s easy enough to clear but a real pain if your technique doesn’t suit them.
Thanks again. I think I'll avoid them as I spend a lot of time commuting and inerently the braking required would mean squeal.
Would you have any suggestions for something a bit more generic/road orientated?
Took me a month to get rid of the vibration - including motorway speed braking to approx 30 miles an hour. It’s takes a tiny amount of pad material on the disc to cause it. I know. I had the same problem.
Just for fun, spray some water on the discs. Wait for the disc to discolour. You’ll be able to see where the pad material is (ie where the disc doesn’t slightly corrode). Just takes time but the vibration will go away after more braking.
Just for fun, spray some water on the discs. Wait for the disc to discolour. You’ll be able to see where the pad material is (ie where the disc doesn’t slightly corrode). Just takes time but the vibration will go away after more braking.
Pauloamore said:
Took me a month to get rid of the vibration - including motorway speed braking to approx 30 miles an hour. It’s takes a tiny amount of pad material on the disc to cause it. I know. I had the same problem.
Just for fun, spray some water on the discs. Wait for the disc to discolour. You’ll be able to see where the pad material is (ie where the disc doesn’t slightly corrode). Just takes time but the vibration will go away after more braking.
It’s better after a week and a few hundred miles already. Good to know it will recover. Just for fun, spray some water on the discs. Wait for the disc to discolour. You’ll be able to see where the pad material is (ie where the disc doesn’t slightly corrode). Just takes time but the vibration will go away after more braking.
5678 said:
It’s better after a week and a few hundred miles already. Good to know it will recover.
It will. To accelerate recovery I have found that hosing the discs in the evening creates surface rust that makes the self cleaning process quicker when driving the morning after. Sounds bizarre but has worked for me when I had deposit.Heat management can be tricky on heavish cars but my advice is to spent as little time as possible on the brakes, ie brake very hard but on as short distance as possible. Obviously maintain good modulation using the usual bell curve shape pressure to minimise weight transfer on initial application and release.
I had to laugh at the mention of EBC early in the thread.
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