I have grooved discs on my RS265 (Cup chassis) and on a recent long high speed blast through Scotland I noticed the brakes were ‘rumbling’ a bit. However pads and discs were fine. Since changing to Ferodo DS1.11 I noticed this more and a bit of Googling highlighted that grooved discs are prone to this. Despite having performance cars for many years I’ve ned owned one with grooved discs. Apparently the rumbling is air getting trapped in the grooves. Is this common?
Very common, Just something you have to learn to live with. Im running J-Hook discs on mine now which are even worse for noise LOL!
Mine did this, more recent than not. Ie in the last 5k miles. I don't recall them doing it until then. My discs have seen 40k though. Due use to caution, I changed them recently for new discs and haven't noticed the noise as yet. Old discs had loads of life left in them too.
Brakes seem less noisy now which is good but brake squeal at low speeds is annoying. Anything I can do about that?
Clean the copper grease off your pads, Its shite. Use Ceratec instead. You will never get them to be silent. Its the trade off from using aggressive compound pads
Copper grease. - Ceratec... these wont stop the squeak unless theyre seized in the caliper. You could try taking the leading edge off the top of the brake pad.
TBH its the squeal that's annoying me now, the noisy brakes are OK but at slow speeds the constant squealing is a PITA
If stripping and cleaning the brakes and building them back up doesn't sort it the only option is different pads. I have RC5s in mine, they've lasted fricking ages but if you leave them to get clogged up they squeal like a piggy, often they just need a blow over with the pressure washer and that sorts them, but they'll always squeal a bit even then.
My car is a DD. I think I'll put the old pads back in, at least on the front and then just swap back for TDs and hoons.
My RC6 are ridiculous at low speed but it doesn't really bother me tbh. I had the oem pads in while I was waiting for these to replace the RC5 and I couldn't believe how crap they were in comparison.
I've just put a set up for sale if you choose to go down this route http://www.rsmegane.com/showthread.php?t=8551 I have them on my r26 and no squeal so far (after 1k), still expecting a little noise when their a bit older but im not too fussed personally. Feel very good on the road once warm.
