62 replies to this topic

[speedster]

Now that i have a set of AP 4 pods for the front is it worth putting the old 2 pods on the back? Does it help!

[JG]

no is the short answer.

 

Lots of problems with locking rears.

 

it can be made to work very well, (jimmy's car is aweseome on brakes but he has a bias valve)

 

 

[speedster]

no is the short answer.

 

Lots of problems with locking rears.

 

it can be made to work very well, (jimmy's car is aweseome on brakes but he has a bias valve)

 

 

 

Something like this?

 

http://www.wilwood.c...nderValves.aspx

[Sticky]

You'll need an adapter bracket and then decide if you're going to retain the Brembo for the handbrake element.

 

Do you need it to pass an MOT?

 

Steffan on here makes the brackets and is developing a spot caliper for the handbrake but this is taking some time

[speedster]

You'll need an adapter bracket and then decide if you're going to retain the Brembo for the handbrake element.

 

Do you need it to pass an MOT?

 

Steffan on here makes the brackets and is developing a spot caliper for the handbrake but this is taking some time

Car will need to pass the equivalent to an MOT. Sounds like its still an experimental mod.  

[Sticky]

You can still retain the brembo for the handbrake only but you then lose out on any weight saving.

[Mike (Cliffie)]

It is a shed load of work and expense but worth it when you get the balance right with pad material and bias. 

[JimmyJamJerusalem]

I've just done this and I think it is an awesome mod!!!!

 

To save messing about with differing pad compounds fit the same front and rear and turn the rears down slightly with a bias valve.  i use this one.  Works brilliantly!!

 

  http://www.burtonpow...CFfMbtAod82MARg

 

[chris_uk]

Can i just add.. Ive had my brakes setup like this for years, i was probably one of the first to do this and i have never had the troubles we are currently seeing here about locking brakes and the need for a brake bias kit etc, and its not like i drive like a grandad either, i have driven it very hard and braked very hard.. Downhill corners for example and never had any issues. (Ive even got the video of jimmy himself saying how fantasic they are and how much he wanted them) The pads are the same compound all round (cl5+'s) and im using r888 tyres. I originally had this setup with the standard tyres and i didnt have any issues then either. What you will get is more pedal travel, expecially if you dont bleed them up right. If you can get the brackets cheap, go for it, if nothing else they look cool

[Bumblebee]

Yeah Chris certainly drives is car hard

[speedster]

I've just done this and I think it is an awesome mod!!!!

 

To save messing about with differing pad compounds fit the same front and rear and turn the rears down slightly with a bias valve.  i use this one.  Works brilliantly!!

 

  http://www.burtonpow...CFfMbtAod82MARg

 

Is it just a matter of plumbing it into the rear brake line (exiting the master cylinder)

[speedster]

Can i just add.. Ive had my brakes setup like this for years, i was probably one of the first to do this and i have never had the troubles we are currently seeing here about locking brakes and the need for a brake bias kit etc, and its not like i drive like a grandad either, i have driven it very hard and braked very hard.. Downhill corners for example and never had any issues. (Ive even got the video of jimmy himself saying how fantasic they are and how much he wanted them) The pads are the same compound all round (cl5+'s) and im using r888 tyres. I originally had this setup with the standard tyres and i didnt have any issues then either. What you will get is more pedal travel, expecially if you dont bleed them up right. If you can get the brackets cheap, go for it, if nothing else they look cool

Is the positioning of your rear calipers different to those locking? What did you do for a handbrake?

[chris_uk]

nope, its practically identical, for the handbrake i left the standard caliper on there, ive looked at lighter weight units but i cant be bothered changing it over, it works so ill leave it.

[speedster]

nope, its practically identical, for the handbrake i left the standard caliper on there, ive looked at lighter weight units but i cant be bothered changing it over, it works so ill leave it.

 

Could you post a pic? I'd like to see how it looks with 2 calipers, thanks.

[chris_uk]

[speedster]

Thanks! interesting configuration... think I would keep them black. who made up your brackets and what from?

 

[chris_uk]

Tbh i am going to repaint them black at some point. Pheonix motorsport made my brackets. Piece of p*ss to fit aswell.

[JimmyJamJerusalem]

My plumbing is easier as I've removed the abs module but you would need to T into the line from the master cylinder port which feeds the rears before it reaches the abs module.

 

I know Chris is saying he's not had an issue with the lack of brake bias but to be fair SteveA has.  SteveA is one of the most exerienced track day drivers I know and he destroyed his car in an accident on track caused by improper brake bias.  Locked the rears up, Game Over

 

JohnTurbo is the man to speak to about this but I'm sure he said the correct braking ratio on these is around 60f:40r and simpy bolting the AP's on the rear will disrupt this.  I was impressed by the power of Chris' brakes and it has clearly propmted me to upgrade my brakes but I've reasearched the job since then and feel I needed to take measures to maintain the correct front to rear ratio.  There are other ways of achieving this though without a bias valve!  Some run slightly lower bite pads on the rear.  I run a few threads on this here and there

[chris_uk]

My pub logic told me if i double the pistons on the front i should double them on the rear to keep the balance. I know there is alot more to it than that tho, didnt steve put in the wrong pads tho? I didnt know he had 4pot/2pot setup.

[Gedi]

Yep, steve was running different compounds on the rear (new RC6) and the fronts faded leaving the rears to overwhelm the grip and lock up.