Please forgive me if this is posted somewhere else, I can't seem to find if there's another thread, let alone know what forum to post this in.

Since the GP2's 6 Piston system is available via the parts counter, I was wondering if anyone was planning on making the upgrade. I was planning to go to the 4 Piston R56 next year, but what the hell eh?

I wonder if we'd need to get a full new pluming system and Master Cylinder.

Any thoughts? Anyone going to do it?

 

You'll be spending a ton of money for that setup...

I'd look at the master cylinder in a GP2, and if it's the same as the stock R56, I'd imagine it wouldn't be a problem on the R53. I'm probably going to put a different master cylinder on my car someday, but it's due to an upgrade on the rear brakes rather than the fronts (I have a four piston setup on the front).

What do you do with this car--is it a track car, or daily driver? There are better, cheaper alternatives to the GP brakes--I'm not knocking them, if I bought a GP2, I wouldn't get rid of them; on the other hand, if I was shopping for brakes, these would be pretty low on the list.

 

If you had to replace just the stock R53 front and rear calipers it's over $1200.

At $2000, it's a marginal increase to go to the complete front and rear R56 JCW package (minus brake lines).

There's no way I'd need that much stopping power, but I'm sure they're fantastic. I know there are cheaper alternitives, but this keeps it JCW (for those purists).

I'm just curious what the increase would/will be from the 4 piston setup, and I'm sure there's some of us that are crazy enough to do it.

 

I'd check and see if they change the master cylinder for these in the R56--if not, it should work. It's going to be all about pedal travel; you might want to check an R56 out, if it has the stock R56 master cylinder and the 6-pot brakes--if pedal travel is reasonable (i.e. not too far), that would be encouraging for it to work straight up on the R53.

If so, the M3 master cylinder MAY work on the MINI, there is a company working on that at the moment, but it's a work in progress.

 

Found this thread. It may be helpful to others regarding the brakes and wheel fitment:

https://www.northamericanmotoring.co...l-fitment.html

 

Hi All,

I did this upgrade a few weeks ago, easy mod but not cheap, good pedal and no need to change the master cylinder....for all GP2 owners wheels are Team Dynamic pro race 1.2 7.5x 17 et45.

 

Fantastic!
Can you tell us more about the conversion?
What year is your Mini?
Did you change the front and back?
What other parts did you need?
Did you need to modify anything or was it straight bolt on?
And... How much did it cost in the end?

 

deleted post as duplicated below

 

Honestly for that kind of money I would talk to Todd at TCE. After talking to my mechanic I wold also stay away from the R56 4 piston ones. People have taken them to the track and MELTED the pistons. I guess their some sort of composite materiel. and you can't buy replacements... He has a friend at the dealer with a set of the cooked ones.

 

Hi Jamez,

I bought the calipers and discs new from MINIMATT Ltd for £1200, he also had the rears for sale but you don't really need them on an R53. I then bought new GP2 calliper to hub bolts (same as r53), disc bolts, hoses and disc back plates but then found out that the back plates don't fit as the mounting holes are different so I modified the R53 ones with a Dremel (easy). The only other mod was to the hose mounting on the inner wing, this needed 4 small slots to take the new hose again with the Dremel (then painted). All then bolted straight on and used the R53 pad sensor. My car is a very late 2006 so has the M14 wheel bolts so disc holes match but I don't think this would be a problem anyway with M12 wheel bolts.

My brother (GP2 Owner) works at a well know racing brake company and he worked out the fluid displacement and brake torque before I bought the brakes and all is within there limits. Pedal travel feels factory and boy do they stop!!!

For GP2 owners the wheels are 7.5x17 ET45 TD Pro Race and there is 8mm caliper clearance.

 

Sorry Jamez, I seem to be having problems posting a detailed reply.

 

The only parts that where GP2 where the Discs, Calipers and hoses all other parts where R53. Had to modify the disk back plate (GP2 won't fit) and the mounting points for the hose on the inner wing. Only changed the front as the rears do very little work. My car is a late 2006 with M14 wheel bolts. All was very easy and pedal is OEM feel and boy do they stop.
My brother works for a well know racing brake company and he worked out the fluid displacement and brake torque to check all was ok before I started the mod.

 

Cost me £1200 for the calipers and discs new from an independent and £100 for new bolts, holes and sensors form mini. Only replaced bolts and sensor to do a 'as new' job.

 

Wheels are TD Pro race 7.5x17 et45 and give about 8mm caliper clearance (no spacers)

 

I know this is an old thread but we now make upgraded stainless steel pistons for the factory JCW Brembo 4 piston calipers that wont melt on track. They are direct replacements for the factory pistons.
http://www.sneed4speed.com/r56-jcw-b...n-upgrade-kit/