retrofit brake kit bmw performance

[GTAStradale]

I am also starting a thought process that this is the way to go. So any advice or experience would be appreciated!

The only thing I know about these brakes - I met a guy on a racetrack last year in Austria who had them fitted on his CSL. It was his first track day with these brakes, but I remember he was not impressed at all. I am trying to get hold of him nowadays to see if he can share some more info with me (e.g. which pads did he have on). I will keep you guys posted...

[shimmy]

Originally Posted by born2boost

In what way does the AP kit feature better cooling?

Bigger discs, better Disc vanes and venting. Otherwise why would the AP not overheat like the BmW OeM.

[_Nathan_]

Better vanes and venting? Based on what matey?

Difference is the calipers rather than the disks in my opinion.

[_Nathan_]

What disks did matt use with his Porsche brakes?

[mattCSLnut]

Originally Posted by _Nathan_

Better vanes and venting? Based on what matey?

Difference is the calipers rather than the disks in my opinion.

I have to agree ...

[mattCSLnut]

Originally Posted by _Nathan_

What disks did matt use with his Porsche brakes?

... just don't drag me into this battle will Ya

[shimmy]

Originally Posted by _Nathan_

Better vanes and venting? Based on what matey?

Difference is the calipers rather than the disks in my opinion.

So why do BmW overheat nd AP not overheat in he same circumstances?

[_Nathan_]

What type of fade did you get with the oem setup? Pad or fluid? For me it was fluid, bigger calipers made of different material can dissipate heat better / faster than the oem ones so prevent the fluid boiling, I also suspect that sliding v non sliding means heat is less localised in the opposing piston calipers?

[shimmy]

Originally Posted by _Nathan_

What type of fade did you get with the oem setup? Pad or fluid? For me it was fluid, bigger calipers made of different material can dissipate heat better / faster than the oem ones so prevent the fluid boiling, I also suspect that sliding v non sliding means heat is less localised in the opposing piston calipers?

Surely the heat starts in the disc, and the venting of the disc is bigger and better IMHO so temps will be less, and less transferred to the calliper and fluid. With OeM I had both lad fade and fluid boiling. Only on very rare cases I have had a soft pedal with AP set up

[_Nathan_]

The csl disks are vented though, what makes you say the AP venting is better? the ap disks have 6mm bigger radius from memory which as a percentage isn't huge.

No proof to back it up but I strongly suspect that ap calipers on CSL disks would be fine.

On the pad fade thing, I wonder how much of that is the smaller oem pad having less heat capacity?

Perhaps the PF guy can add something here?