[Alscoob]

Just a heads up for anyone wanting to change the standard 370mm discs for the M performance slotted and dimpled type.

I had a good look around but couldn't bear to part with the £400+ price from the dealers and in the end bought Textar OE discs, having fitted them with new Pagid pads they are fantastic now bedded in.

I purchased them here... https://www.ebay.co.uk/itm/Genuine-O...53.m2749.l2649

Service and delivery was excellent ordered Friday arrived Monday. They are 2 piece coated discs so that helps prevent corrosion and rust. At £256 was a good saving.

Hope it helps

[Techno 9000]

Thanks for sharing.

Have you noticed an increase in noise under braking from the slots in the rotor face?

[Alscoob]

Originally Posted by Techno 9000

Thanks for sharing.

Have you noticed an increase in noise under braking from the slots in the rotor face?

Under normal braking no but hard braking yes, you do have an increase in noise, but I'm OK with that. I suspect that after a couple of hundred miles it will be less noticeable as they will have bedded in properly.

I find that this type of disc helps increase the braking efficiency, with dispersing heat & also water when its chucking it down. Brake fade in normal road situations is due to the build up of gas between the pad and the disc, the dimples and grooves help disperse this for a more consistent pedal feel.

[teaston]

Originally Posted by Alscoob

Under normal braking no but hard braking yes, you do have an increase in noise, but I'm OK with that. I suspect that after a couple of hundred miles it will be less noticeable as they will have bedded in properly.

I find that this type of disc helps increase the braking efficiency, with dispersing heat & also water when its chucking it down. Brake fade in normal road situations is due to the build up of gas between the pad and the disc, the dimples and grooves help disperse this for a more consistent pedal feel.

More like a few thousand miles in my experience.

Modern brake pads don't actually expel gas under braking.

[Alscoob]

Originally Posted by teaston

More like a few thousand miles in my experience.

Modern brake pads don't actually expel gas under braking.

Learn something new every day!

[Alscoob]

Well this is intersting....... as i thought.. from Brembo direct

http://www.brembo.com/en/company/new...for-purchasing

4) Better heat and gas dispersion

​On a standard disc, a sequence of decisive braking manoeuvres in a short period of time translates into a temperature increase. The combustion of the resins that make up the pads, in turn generates gases (fading) that act as a bearing between pad and disc, decreasing the efficiency of the braking system.

On a Brembo Xtra disc, on the other hand, the holes allow for quick expulsion of these gases, keeping the friction coefficient unaltered. The holes also help heat from the braking system dissipate more efficiently, even in normal driving conditions.

[teaston]

Originally Posted by Alscoob

Well this is intersting....... as i thought.. from Brembo direct

http://www.brembo.com/en/company/news/brembo-perforated-disc-5-reasons-for-purchasing

4) Better heat and gas dispersion

​On a standard disc, a sequence of decisive braking manoeuvres in a short period of time translates into a temperature increase. The combustion of the resins that make up the pads, in turn generates gases (fading) that act as a bearing between pad and disc, decreasing the efficiency of the braking system.

On a Brembo Xtra disc, on the other hand, the holes allow for quick expulsion of these gases, keeping the friction coefficient unaltered. The holes also help heat from the braking system dissipate more efficiently, even in normal driving conditions.

That's just marketing hype, I've looked into this lots over the years. The grooves to help to decrease pad glazing & reduce heat in the disc though.

Hence if you look at any race car they have grooved discs but not drilled or dimpled.

[Manivxr]

Originally Posted by Alscoob

Just a heads up for anyone wanting to change the standard 370mm discs for the M performance slotted and dimpled type.

I had a good look around but couldn't bear to part with the £400+ price from the dealers and in the end bought Textar OE discs, having fitted them with new Pagid pads they are fantastic now bedded in.

I purchased them here... https://www.ebay.co.uk/itm/Genuine-O...53.m2749.l2649

Service and delivery was excellent ordered Friday arrived Monday. They are 2 piece coated discs so that helps prevent corrosion and rust. At £256 was a good saving.

Hope it helps

Are you running 345mm on back. Same make?

[Alscoob]

Originally Posted by Manivxr

Are you running 345mm on back. Same make?

No Just the standard OE at the rear