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Weird R32 GTSt factory brake options

Mildman
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Mildman Contributor

Mildman

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I own a R32 GTSt and have found something very interesting with the brakes.

I wanted to change the rotors so ordered in some R32 GTSt disc rotors: A 280mm diameter, 30mm thick disc rotor (for the front). These are the factory spec - and can be found in the DBA catalouge.

When I took the rotors of my factory R32 GTSt I found that the rotors were 280mm diameter, 22mm thick.:(

The 30mm rotors would not fit into the callipers!:)

Is anybody aware of any R32 GTSt’s that came out of the factory with smaller brakes? (280 x 22)

Would normal R32 GTSt callipers and rotors fit on this model?

Would R32 GTR Brembo’s bolt straight on as well?

I would appreciate any assistance, even if only to point my in the correct direction of where to find this information.

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https://www.sau.com.au/forums/topic/15749-weird-r32-gtst-factory-brake-options/
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Mildman Contributor

Mildman

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I've done a bit more research and it seems that the 4 pot calipers were an optional extra (technically standard on an M spec) - but could still be optioned out.

The single pistoned caliper is the same as a S13 200SX brake.

I checked my model spec KRCR32RGFSM AA - which is defintely a 5 spd manual M spec GTSt (don't know what the AA stands for) - so my only guess it was optioned out - or changed over before it landed in Oz

Means with a bit of modding (ripping off the dust covers) a GTR brake will fit under there nicely.

If anyone hears more about factory options - I'm still interested

Thanks,

red17 Experienced

red17

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Do you have standard rims? Remember the 4 pot's stick out alot more and require different offset rims. If you have aftermarket ones theres no quarantee they will fit.

Just something else to think about if you didnt already have enough. By the way the 4 pots are commonly bolted onto S13 silvias and 180SX's so theres no problems bolting them up. Clearance is the main issue.

Red17

PS: I though the M Spec was HCR32, not KRCR32?

Mildman Contributor

Mildman

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Yeah the type is E-HCR32, where E stands for petrol, and HCR32 is the model type.

I've posted another thread about decrypting the VIN plate (which my other research project - related to determine why I have such pissy brakes)

Might check out the availability of 4 pots on Silvia's - almost all have 4 stud wheels which means the rotors wont go on my 5 stud hubs.

The car if defintely M spec from the model spec, but also it has a std GTSt steering wheel, not the snazzy M spec wheel. So it seems the car is a factory M spec with a couple of downgraded options.

Maybe the original buyer didn't quite have enough money, and had to deoption the car.....maybe I'll never find out.

Thanks for the caliper tip though, I'll let you know what I find out

KRCR32RGFSM AA

RC = rwd, R = M spec, 32 =R32, GF=manual (that's about all that is confirmed at this point)

Mildman Contributor

Mildman

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An offer worth considering.....

Would that full set of GTSt brakes come with a master cylinder as well.

I have a bad feeling if I upgrade my calipers, that I will also have to upgrade my master cylinder.

I will try to work out this week what the part number for the big brake master cylinder is, and if that is what I already have installed in my car.

I've got a hunch though that I will have a much smaller master cylinder (to go with my 180SX size brakes).

Thanks for the offer though Dragan, I wont keep you hanging too long.

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