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R33 Brembo Conversion

Pure_Sincerity
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Pure_Sincerity Enthusiast

Pure_Sincerity

Posted
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Picked up a set of front and rear 33 GTR brembos to be fitted to my r34 GT.

Any insight on those who have done it ?

Fronts seem to be a straight bolt up, but are the brake lines the same ? ATM I'm running 32 GTST calipers.

And for the rear, how is the handbrake set up ?

Cheers fellas

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Pure_Sincerity Enthusiast

Pure_Sincerity

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They use the same bolts, so that's no worries. What I'm concerned about is the rear handbrake setup ? How is it done on skylines ? All previous cars I've had have had a line that runs down and sits on a hook on the back of the caliper. Looking at the back of the brembos, it only has the brake fluid line. I haven't pulled the rear calipers off to look yet, will be doing it tomorrow, just getting insight first.

GTSBoy Grand Master

GTSBoy

Posted
Posted

They use the same bolts, so that's no worries.

No, that's the point. The earlier Skylines all use 12mm bolts to mount the caliper to the upright. The R34GTT changed to 14mm bolts. The question was whether the R34 GT was the same as the GTT or the same as the earlier cars.

As to your handbrake question. I'm not sure what you mean. The handbrake is an internal drum, activated by cable. There is no hydraulic connection pertinent to the handbrake. The handbrake is nothing to do with the calipers.

It would be fair to guess that Nissan saw no point in making dedicated handbrakes for the Brembo cars. So the internal drum size should be the same for all of them. Having said that, I'm talking about one type of car at a time. So, if we were talking about putting R32 GTR Brembos onto an R32 GTR that originally had Sumitomos, you'd assume no trouble. Same if you were doing the same on an R33. But when you start mixing up earlier model GTR Brembos onto later model non-turbo cars, the potential exists for the existing brakes on your car to be made up out of bits and pieces that are sufficiently different from the turbo cars that assumptions start to break down.

ichi-go Rising Star

ichi-go

Posted
Posted

34 GTT came with 2 pot rear and separate handbrake which will be plug and play for brembo conversion

If your rear are not 2 pot and just a single pot (like an s15), highly likely that you will need a handbrake conversion from any of the Nissan family as they all fit the brembo conversion

And you will also need the BMC from r33gtr/r34gtr/z33, otherwise it will be too rear bias

Pure_Sincerity Enthusiast

Pure_Sincerity

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ATM I have the stock r34 single pot rear calipers, and r32 GTST caslipers on the front with adapters running 324mm GTR rotors. It brakes really really well, but it is too much on the front compares to the rear, it's not well balanced at all. I'll update this later and see how I go.

GTSBoy Grand Master

GTSBoy

Posted
Posted

It's a question of fluid volume that needs to be moved. Bigger piston area means more fluid needs to be moved in order to obtain pad movement followed by pressure. A small master cylinder piston diameter means you use up a lot of pedal travel getting the pads to move onto the disc, then the hydraulic ratio is not very great and you need a lot of pedal pressure to put sufficient pressure onto the back of the pads.

I don't know what size MC piston is in your car, but it is a fair bet that it is smaller than the BM50 or BM57 size MCs that the Brembos' original car had.

KiwiRS4T Grand Master

KiwiRS4T

Posted
Posted

Sure you've bled them properly? I put GTT and then 8 pot D2s on my Stagea and they worked fine although with a little more travel. I think the Stagea had a BM50 but I have since put a BM57 on to shorten the travel a bit. I would be surprised if you had no brakes at all. Try another bleed. But maybe if your car has a really small MC that could be the problem. I take it you are planning to upgrade the MC anyway - you are looking for an R34 GTR one or possibly a 300z DETT one. Also a bigger MC means you have to stand on the pedal harder so maybe try and get the booster to go with it if it is bigger then the one you have now.

Pure_Sincerity Enthusiast

Pure_Sincerity

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I bled front and rear for almost an hour trying to get a pedal feel, then nothing. Put it down and went to drive, and I still had no brakes at all. Anyway, I sold the brakes last night, got double what I paid for them. I may just go the R34 GTT brakes front and rear with braided lines and call it quits there. After all I am only wanting 300 rwkw when boosted. Cheers guys for all the insight.

niZmO_Man Grand Master

niZmO_Man

Posted
Posted

When I put the Brembos on my car, I had the same problem. Kept bleeding it and it did improve a bit. Put a Cusco BMC and that improved pedal travel noticeably. At the moment I can drive around with more confidence than the old stockers (pads were below average), but under hard braking the pedal starts to sink.

I need a new brake master :(.

KiwiRS4T Grand Master

KiwiRS4T

Posted
Posted

I first put GTT brakes (with braided lines, a M/C stopper and Motul RBF600 brake fluid) and they were fine on my 1800kg Stagea. Only went with the D2s because a set came up and to provide insurance when hammering the car on the track. They should be fine on your car but maybe look out for a bigger M/C as well.

I bled front and rear for almost an hour trying to get a pedal feel, then nothing. Put it down and went to drive, and I still had no brakes at all. Anyway, I sold the brakes last night, got double what I paid for them. I may just go the R34 GTT brakes front and rear with braided lines and call it quits there. After all I am only wanting 300 rwkw when boosted. Cheers guys for all the insight.

Pure_Sincerity Enthusiast

Pure_Sincerity

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How did that setup go ? Because that's what I'm looking Into. ATM the front GTR rotors with 32 4 pots its pretty good. I just picked up the 34 2 pot rears last night. Was planning on the MC stopper and braided lines also.

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