My Newest And Most Recent Headache

[MickEdge]

Hi guys,

and before its said ive searched and searched every forum known to man. funnily enough i havent been able to find info to aid me!

Nevertheless, i recently purchased a set of brembos. R34 GTR rear brembo calipers alledgedly

over the course of the past weekend i decided id throw them on. I went to my local part store and got a set of matching rotors.

Heres where i fall off the knowing boat. Aparently, r34 gtr rear brembos are a direct fit to a stock 98 r34 gtt, but after removing the stock calipers/discs i came to the conclusion that the calipers in question dont align to the stub axle by 4-5mm. They fit the rotor nicely just the caliper mountings dont line up. Ontop of that the bolt sizes to fit them are a bigger size.

So if anyone could help me out in terms of

- Are these actually R34 GTR rear calipers. Ive been told by one person they are r34 gtr ones. Another told me they are from a 350z (aparently he identified it from the brake pad.)

- Do stock rear gtr calipers bolt straight onto gtt's?

- Is it possible to put them on my 98 gtt?

- Am i going to need to manafacture an adapter plate and get a bigger rotor?

Pics to follow.

Im at the point of severe annoyance with this.
Happily give 4 cases of beer to someone to fit them at this point... haha

Rotor Info :

Manufacturer DBA Product code DBA 4929S DBA Series 4000 series T3 slotted Ventilation Vented Diameter [mm] 300 Thickness [mm] 22 Minimum thickness [mm] 20

[MickEdge]

bumpy bump.

Someones gotta have seen some 34 gtr brakes before!

[75coupe]

Google has

[Hadouken]

They look like gtr brakes

34gtr is a straight swap onto gtt

[MickEdge]

Cheers 75coupe.

Hadouken, straight swap?

i pulled my wheel/disc/stock caliper/lines off and held the new ones up.

Caliper mounting holes are bigger than the ones on my stub axe, also the holes mismatch by about 4-5mm

Straight swap with some drilling may work? just seems dangerous to be drilling out shit like this. I figured it was going to be like removing lego piece a and replacing with lego piece b. Needs some work

Any ideas?
thanks heaps

[ichi-go]

- Are these actually R34 GTR rear calipers. Ive been told by one person they are r34 gtr ones. Another told me they are from a 350z (aparently he identified it from the brake pad.)

Hard to tell just by pictures esp when there are other manufacturers who has gold brembo brakes (Subaru STI for example)

- Do stock rear gtr calipers bolt straight onto gtt's?
Yes

- Is it possible to put them on my 98 gtt?
Yes

- Am i going to need to manafacture an adapter plate and get a bigger rotor?

It should be plug and play

Someone from the s15 forum has fitted z33 rear brembo and it looks like it's not plug and play

Update
rear calipers will not bolt straight on. hole pitches are different. aslo thread is different to brembo are M12 and s15 are M10
caliper offset maybe different too ... will confirm this....
Im planing on slotting holes out to fit as they are only out by half a bolt. as for offset if out, some shaving of the knuckle mount bracket maybe needed.
if failing this will need to make up some sort of braket to fit... im trying to avoid having to cut and weld the knuckle.
will need to confirm when completed.

will need backing plate with drum disc mechenisim from following s13,r32,r33,z32.
r33 hand brake cables.
conversion braided hoses. (apexperformance can supply these)
some M12 bolts.

[MickEdge]

hmmm, well i wish it was plug and play.

gonna have to figure out a way around the holes not lining up.

thanks for the help guys!

if anyone else can share some insight it will be incredibly appreciated

[lidz]

If they don't bolt right up, they're not bnr34's. The only potential issue when fitting bnr34 brembo's applies to r32/33/z32/etc owners & should be enlarging the mounting holes in the hub from 12mm to 14mm. This shouldn't apply to you with a gtt (as I understand it).

Are they z33? Front rotors will have a different offset to bnr34.

[MickEdge]

i am not sure if they are z33.

Front brakes on the car came across from japan and sold as "98 r34 gtt with r34 gtr front brake kit." i didnt look into the front anymore than that. Not worried about anything on the front though. Rears is what giving me the grief

So what your saying is (to clarify) these arent gtr calipers because they arent a direct fit.

the bloke who i bought these calipers said they came off a 99-00 gtr. Unless he was bullshitting.

Storefront did identify the pads as being from a 350z.

More talk led me to believe the z33 and gtr had identical rears. Not sure though

Edited April 1, 2015 by MickEdge

[lidz]

Sorry about confusion regarding fronts.

I know I can't run z33 rear brembos on my z32 but I can run bnr34 ones (after drilling hub to 14mm as mentioned).

Also quick search gave this, see last post:

http://www.sau.com.au/forums/topic/121533-350z-and-gtr-brembo-calipers/page-2

[75coupe]

Just because they look like gtr brembos doesnt mean they are, lots of cars have rear gold brembos...

[niZmO_Man]

If the holes don't line up, it means they're not 100mm caliper spacing i.e. not Nissan calipers.

[MickEdge]

Well given the guy at the shop identified the pads as being from a 350z

the caliper mounting + spacing is off

the fact that the rears dont bolt on directly as r34-gtr rears are supposed to i can give my best assumption that these are infact 350z brakes.

what a f**k around..

thanks guys for all the help!

Im just gonna have to sell them, try and find a real set of gtr calipers to finish off the brakes on the car....

any further input is appreciated.

thanks for the help again.

[jay-rod]

Maybe your brake assembly is a r34 gt not gtt?

[MickEdge]

Everythings a possibilty to look into. But idk that seems highly unlikely