Upsizing Gtr Rotor Using Std R33 Gtr Brembos

[Al]

I have just purchased as set of front R33 GTR Brembo's for my R33 Gts-t and intended to purchase a set of DBA5000's.

Now the std size DBA5000's are 324mm in diametre and 30mm thick, but then i started thinking................

1/ If i was to get brackets professionally made, to "lift" the caliper, what is the biggest sized rotor i could fit? I was hoping to fit 343mm rotors, but am unsure if the caliper is compatable with the differance in "curvature".

ie: Some calipers, such as AP Racing, are designed to be compatible with a certain range of rotor sizes (eg: 290mm to 343mm). Are the R33 Brembo's compatable with 343mm rotors or bigger?

2/ Am i able to fit 32mm thick rotors or are the Brembo's limited to 30mm?

Your help would be GREATLY appreciated

[Roy]

You are a pioneer my friend. Odds are you will be able to run a 340-343mm rotor without too many dramas. I would be very reluctant to inrease the rotor width though, so stick with 343. Try the DBA 5000s of HSV/FPV with custom hats

[Ronin 09]

343s are about as big as I've seen adapters.

will have a flick through my HyperREV mags soon and let you know...

as an aside I'm doing exactly that with the factory rear brembos - going from 300mm to 322mm rotors with a bracket

[GTRgeoff]

Talk to Howard at Racebrakes Al.

So you of course plan to get the rears and master cylinder don't you?

The few cars I have driven with this mod (just the fronts) felt crap in the brake pedal. Very spongy and pinchy in the rear, even with ABS on one, using braided lines.

[Al]

Talk to Howard at Racebrakes Al.

So you of course plan to get the rears and master cylinder don't you?

The few cars I have driven with this mod (just the fronts) felt crap in the brake pedal. Very spongy and pinchy in the rear, even with ABS on one, using braided lines.

Spoke to Howard, very arrogant, felt like slapping the attitude off from his face. He should learn that not everyone knows everything about brake sizes, etc. So instead of pratonising a potenial customer, he should help and explain, that way he may get some business.

Nope; Have been told by numerous other people that the rears are fine. Was considering moving my std four pots to the rear, but then was advised otherwise.

Any opinions on this?

[Roy]

Howard hates what you are proposing, he HATES my brake setup. But not everyone has $3400 for an AP 4 pot upgrade or $4200 for a 6 pot upgrade.

And i still cant think of any car or driver that has been able to gain ground on me under brakes

[Gts-t]

I would really like a brake upgrade and for along time thought i could just use any nissan brembo as long as i used the disc from the same car. For some time though there has been so much talk and probably many myths created about upgrading brakes on skylines.

At the momment i think the G4 8pot kit that just jap are selling looks like a pretty good idea for my r32 gtst.

Ultimately i want a larger disc, so i will use the standard 4 pot calipers but would prefer to upgrade them to anything bigger unless it requires alot more work.

Im waiting patiently for someone to find a front brake upgrade that is suitable for use with the standard rears and actually bolts on etc.

Any feedback appreciated.

[Ronin 09]

Al, I'd stay away from moving the front 4 pots to the rears because of the massive % difference between the piston surface areas.

Plus even if you get the right master cylinder, you will probaby have to run a bias valve to limit rear pressure and keep the back from locking up. If you want a rear upgrade, I would suggest getting the R33GTR rear brembo and using the 300mm factory rotor, or getting the brackets to do the 322 rotor

OR find a small porsche rear caliper that has two small pistons with the similar overall piston area to the factory 2 potters

[Roy]

I would really like a brake upgrade and for along time thought i could just use any nissan brembo as long as i used the disc from the same car. For some time though there has been so much talk and probably many myths created about upgrading brakes on skylines.

At the momment i think the G4 8pot kit that just jap are selling looks like a pretty good idea for my r32 gtst.

Ultimately i want a larger disc, so i will use the standard 4 pot calipers but would prefer to upgrade them to anything bigger unless it requires alot more work.

Im waiting patiently for someone to find a front brake upgrade that is suitable for use with the standard rears and actually bolts on etc.

Any feedback appreciated.

If you want a cheap and effective upgade...then i believe you cant go past a larger rotor with the std caliper. Dont have to worry about master cylinder sizes, etc etc. Its a bolt on upgrade, and the only reason you may have trouble is if you run crappy rear pads. Run good qulaity front AND rear pad then you will have very consistant brakes with great feel.

I happily let ppl drive my car, adn those that have, or completed the upgeade themselves have all been very happy. The rotors are a few bob more then the std rotors, so the only real cost is for the brackets, which you will more then be able to save in the long run with less wear. I did about 60,000kms with plenty of track work thrown in before i needed to machine the rotors, i would have thought that was unheard of?!?!?!

[T04GTR]

ok. the 324mm 33/34/gtr discs/calipers will do a really good job.

you would get away with using the caliper on a biger disc. but there only a baby caliper.

my advise is to stick with the standard 324mm discs.

save up for some good ol big reds and the 355mm disc combo

the rears will need attention. ive cracked 3 rear ones just from old raod outings

they dont like getting bright orange very much.

i upgraded the rears to 34gtr/33gtr brembo 2 pot ones and discs.

they work really well. still get a nice dull red glow but.

the fronts are f40 brembo's343mm 2 piece floating discs.

they get orange.

i used to have the 33gtr fronts. they really good. you just need good brake linings.

[Roy]

What is the weight difference between an R32 GTR and an R33 GTS25T? About 150kgs odd?

R33 GTR brakes on an R32 GTST are plenty. On an R33 GTST i dount you would have much problem...that said a change in rotor radius of about 8-9mm shouldnt be that big a deal...but i would only bother if ou could do it all cheaply, otherwise i know of some 2nd hand DBA 5000 hats for sale with old rotos...could run them or get new rotors for the hats...and it will all be bolt up 324mm:)

[Bass Junky]

Check out www.nismo.com.au

GTR sized Rotors with standard calipers.

cheap too.

I would have done had I known about it when I got my DBA4000s

STAGE 1 BRAKE UPGRADE KIT FOR SKYLINE R33 GTS-T

KIT INCLUDES 324MM R33 GTR DBA 4000 SERIES BRAKE ROTORS, CALIPER ADAPTERS, CAP BOLTS AND SHNOOR WASHERS

COMPLETE KIT

OPTION DBA 5000 SERIES TWO PEICE BRAKE ROTORS AVAILABLE

FOR AN ADDITIONAL $450

PRICE: $795.00 FRONT ONLY

[Sydneykid]

the rears will need attention. ive cracked 3 rear ones just from old raod outings

they dont like getting bright orange very much.

they work really well. still get a nice dull red glow but.

the fronts are f40 brembo's343mm 2 piece floating discs.

they get orange.

You really need to work on increasing your corner speed, you are obviously slowing down too much.

cheers

Edited May 16, 2006 by Sydneykid

[Roy]

I have never heard of ppl cracking rear rotors, especially if your car is making a habit of it...seems strange unles syou were using old 2nd hand cross drilled R32 GTR rotors each time?

[sh@un]

If you guys see the way Dave drives, you'll understand

[VHR32]

I have R32 GTR caliper over a 330x32 disc on my Commodore and had to shave a few mm off the inside of the radius to fit the larger disc, apparently you also have to do this to the R33 GTSt caliper too.

might be something to look at with the Brembos.

The gap for the disc in a R32 GTR caliper is 36mm so potentially could use one 34mm wide. Use some verniers and measure the Brembo, you would need a minimum 34mm width to fit a 32mm wide disc.

[Roy]

You dont have any probs with pad thickness when you put in new pads?

[Al]

I have R32 GTR caliper over a 330x32 disc on my Commodore and had to shave a few mm off the inside of the radius to fit the larger disc, apparently you also have to do this to the R33 GTSt caliper too.

might be something to look at with the Brembos.

The gap for the disc in a R32 GTR caliper is 36mm so potentially could use one 34mm wide. Use some verniers and measure the Brembo, you would need a minimum 34mm width to fit a 32mm wide disc.

Thanks for the advise, i will follow it up

[Duncan]

I cracked my standard 32 gtr rear rotors while running in the motor....they aren't too crash hot