32 Brakes On R34 Gt

[SS-]

Hey have been doing some research for a brake upgrade to my 34 na, I was wondering tho will 32 gtst brakes fit on( have a spare set) and also would 32R fit on? As there the very similar to r33 gtst an would i need a new bmc

Thanks

[Legionnaire]

What NA is it? I have no info on 20GT's, but RWD 25GT's have M14 front caliper holes, so R32 brakes won't "bolt right on" without some drilling or some helicoil action, as they have M12 bolts.

If it's 4wd, both GTSt or GTR brakes will bolt right on.

Regarding BMC - you should really check what's your current BMC, it'd have either BMxx designation, where xx are digits, or diameter in inches cast on the body.

You'll need no less than 15/16 BMC (also known as BM44) for 4-pot front and 2-pot rear sumitomos,

Better feeling with 1" BMC (aka BM50), R34 GTT has it from factory.

7/8 (what is it, BM38?) is too small, 1 1/16 (BM57) is too big for sumitomos IMO.

[SS-]

It's. 98 r34 25gt so he front cailper whole is 14? Meaning they are the same as the gtt? And if i wanted to fit gtst or gtr I would have to get some sleeves made up that reduces the wholee to 12m? And or the rears would the gtr ones fit? Or same thug goes for it as above?

And I checke the BMc is it the bm50

[Legionnaire]

Either that or you can drill out and tap caliper bolt holes.

The rears should bolt up.

[bubba]

I've just looked into this and my parts guy reckons the early 34 GT's are 12mm bolts and the later ones are 14mm.

Luckily for me I run adapter brackets so re-drilling/tapping for 14mm is a non-issue.

If I was the OP, I would be going for 32R or 33GTSt brakes over the 32gtst (sell your 32gtst brakes to some silvia guy and buy some 33gtst).

[SS-]

Ohhh okay thanks guess i will have to look at the bolt size ten later on

And as for the which brakes would it be possible to put on the gtst they are gtst fronts and r33 gtst rears so I got told :s

[SS-]

I meant 32 gtst fronts and 32r rears

[Legionnaire]

Better do it the other way around. 32R front brakes are worth looking for, as they've 296mm x 32mm thick rotor. Rear brakes are identical.

[SS-]

Dammit I tho

[SS-]

Dammit I thought i got a bargain paid 100 for all of them

[Legionnaire]

They're not too bad. You can always buy some 280-324mm adapters and use 33/34 GTR rotors later on - plenty of info about it here.

[bubba]

They're not too bad. You can always buy some 280-324mm adapters and use 33/34 GTR rotors later on - plenty of info about it here.

That's basically what I run but with 33gtst calipers on the 324mm discs.