Upgrading R32 Gtr Rear Brakes (non-brembo)

[Kaido_RR]

Hi,

Just after some information to see if it is worth upgrading the rear brake setup on a r32 gtr (non-brembo).

Currently have AP Racing CP5200 Fronts (4pot, 333 disc), App braided brake lines Front and Back, Std Master and nismo brake master stopper.

Have found a Brembo 4pot kit for the rear, runs a 330 disc (same disc as the v36). the Caliper is a brembo monobloc 4 piston uses the pads from a F40 Brembo (so i am assuming its similar to f40 or an f40 caliper), comes with std brembo pads, brackets and bolts

The Car is a track car. Will this upgrade upset the balance of the braking with such a large caliper on the rear (pretty much the same size as my front calipers).

im assuming that i will be able to run the std gtr master cylinder and it should handle it ok?

Cheers

edit: some more information about the caliper

piston diameters are:26 and 28

Edited September 29, 2010 by Kaido_RR

[Roy]

Will this upgrade upset the balance of the braking with such a large caliper on the rear (pretty much the same size as my front calipers).

You need to understand what you are looking at to understand what you are looking at.

edit: some more information about the caliper

piston diameters are:26 and 28

Running a 26mm and 28mm piston means that the caliper is no bigger then the std nisson sumitomo 2 pot! So its "Such a large caliper on the rear". It has nothing to do with th enumber of pistons the caliper has. Its about their total surface area. Do the math and compare the surface area of two pistons at 26mm and 28mm vs the std BIG 2 piston rear which has a 38.18mm piston.

All it does is allow you to run a bigger rotor and rear pad with a larger surface area. Which if you see my reply in Motorsport I dont think is a wise choice when your front kit is basically jsut a larger heat sink, not a big kit that increases front braking torque.

Also, those rear calipers are mass produced OE rear calipers, and the pads do use the same part numbers as F40/50 fronts. So that means you have a pad with a surface area of 62.1 c㎡. Your front APs use a pad with a surface area of 57.4c㎡. So what that tells me with more pad area in the rear, same diam rotor in the rear, albeit thinner then the front rotor, you will have all sorts of trouble getting temperature into the rear brakes. When they do finally come up to temp they will probably change the balance of the car under braking unless you really dumb down the pad in the rear and run basically an OE Bendix pad or something in the rear.

So, I think its money not best used. If you are going to go with a 355mm + front upgrade with a 6 pot or 8pot front Brembo then this 4 pot caliper in the rear starts to make a little more sense

Edited September 29, 2010 by Roy