Rear BBK, do I really need it ?

[Clubber]

Hey guys,

Since we are on a winter break for track days, I was planning to do a full AP BBK upgrade. Fronts are given but as I understand rear 4 pistons are a little overkill and most people fit them to have a matching set and for looks. Please correct me If I am wrong.
I am sure they are better than stock setup. No question about that BUT seing new M cars even with ceramics running single piston rears made me think. Some race teams are even stating %75 percent of the stopping power is achieved with fronts and some say even more.

What are your opinions ?

P.S. I am running RS29's, SS Lines and SRF Liquid on stock setup atm.

[alexk]

I had AP front/rear BBK before I had to sell it.

I bought only front Brembo BBK and the rear is OEM.
All is ok, I didn't see any issue at the track.
The balance feels right (I do trailbraking).

I am not going to upgrade the rear ones.

[Clubber]

I had AP front/rear BBK before I had to sell it.

I bought only front Brembo BBK and the rear is OEM.
All is ok, I didn't see any issue at the track.
The balance feels right (I do trailbraking).

I am not going to upgrade the rear ones.

Thanks for your input Alex,

It is very interesting that most of the vendors I get a quote from are strongly pushing me for the new AP Radi-Cal kit. They say it is superior in every way but I much prefer the classic kit for ease of finding parts and proven performance.

[shimmy]

Thanks for your input Alex,

It is very interesting that most of the vendors I get a quote from are strongly pushing me for the new AP Radi-Cal kit. They say it is superior in every way but I much prefer the classic kit for ease of finding parts and proven performance.

My kits has been fantastic, best by for the CSL by far

[0836whimper]

Not in my experience.

AP's up front, OEM at back and decent pads all round is a superb combo.

[Clubber]

My kits has been fantastic, best by for the CSL by far
That seems to be the default choice I understand.
Not in my experience.

AP's up front, OEM at back and decent pads all round is a superb combo.

I hope so too although I think I'll put them on each year. This year the fronts and next year the rears, fingers crossed. Unless I win the lotto and go for those new stoptech carbon seramics :)

[_Nathan_]

I found that the car was more settled under hard braking when I went from just front kit with OEM rears to having the 4 pot rears too, the car seems to dive less, less weight transfer to the front.

[CraigMillwardCroft]

I am looking at doing the rear kit as uprated pads are just over heating, will get Adem to look into why first.

[trackm3]

[QUOTE=CraigMillwardCroft;177167]I am looking at doing the rear kit as uprated pads are just over heating, will get Adem to look into why first.[/QUOT


What uprated pads are you running ? Have you recorded the temps ?

[CraigMillwardCroft]

[quote=CraigMillwardCroft;177167]I am looking at doing the rear kit as uprated pads are just over heating, will get Adem to look into why first.[/QUOT


What uprated pads are you running ? Have you recorded the temps ?

I think they were pagids ? and are all blistered.

[trackm3]

[quote=trackm3;177168]

I think they were pagids ? and are all blistered.

Have you any pictures ? Looking down on the pads fitted ?

[shimmy]

I found that the car was more settled under hard braking when I went from just front kit with OEM rears to having the 4 pot rears too, the car seems to dive less, less weight transfer to the front.


After 8 years I think money spent on the AP kit was the best money I ever spent on the CSL......if I was to recommend to anyone buying a CSL to track it would be the first thing on any list to buy

[billyboysm3]

Great balance when braking hard.

[need4speed]

I am looking at doing the rear kit as uprated pads are just over heating, will get Adem to look into why first.

Are you driving with DSC on again!! :hahaha:

[alexk]

I found that the car was more settled under hard braking when I went from just front kit with OEM rears to having the 4 pot rears too, the car seems to dive less, less weight transfer to the front.

This is probably because when installing the rear 4 piston calipers, the brake bias moves more to the rear of the car.

[northernjim]

I am looking at doing the rear kit as uprated pads are just over heating, will get Adem to look into why first.



Turn your traction control all the way off.......

[CraigMillwardCroft]

Are you driving with DSC on again!! :hahaha:

No everything was off, Adem said if you selected the M button this held the rear pads to the disk's but I even left that alone :thumbs:

[Graham]

Superb balance under braking, I have only ever had them fitted front and rear as bought the car with them on but certainly no complaints from me. Everyone comments on how good the brakes are, particularly given the weight of the car.

[M3PhilB]

Do any of you guys who've done the front upgrade fancy selling me your old OEM CSL front callipers? ;)

[Clubber]

Do any of you guys who've done the front upgrade fancy selling me your old OEM CSL front callipers? ;)

You can have my entire OEM brake setup, (front and rear with RS29's all around) if you make an offer, I would consider.