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ActionDan

R33 rears brakes on S13 4 stud - what rotor?

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Swapping out the rear calipers for r33 ones, but not sure what rotor to use.

 

I was told I could use non turbo GT/GT4 rotors as they are already 4 studm but just wanted to be sure I wouldn't need an adapter bracket.

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R33 drilled to 4 sdut.

Just use your old rotor as a template, 1 hole lines up, just drill 3 easy peasy

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I have to buy a rotor either way, so why not just buy a 4 stud one.

 

I was also worried that the turbo rear r33 rotor might be too big

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R33 non-turbo rear brakes are single piston, not sure if disc is different size. DBA lists them as the same as GTST, but also says the GTS25 is 5 stud. (and same with R32 GTS)

 

hth

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Hence my confusion. I'll be using the twin piston turbo rear caliper.

 

I'm more concerned about rotor size matching the caliper and not needing brackets. I might just have to go measure my rears and test fit the caliper.

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NA 33's run 15" wheels, I dont think they'd fit over 297mm brakes. But seemingly noone ever has written on the internet, rear brake sizes for NA skylines

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I have r33 gtst rear 4stud,I redrilled r33 gtst rotors. They just clear 15" wheels, will need spacers..

Edited by HUSTLA

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So you have redrilled turbo rotors?

 

You needed caliper adapters or wheel spacers?

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I have tons of clearance between my brakes and rims so i dont think I'll need those.

 

OK so confirming turbo rear calipers and rotors (drilled to 4 stud) will bolt straight on then.

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Yes, I'm using the r33 handbrake setup aswell.

 

PM if you need help.

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Cheers, my calipers didn't come with the hand brake setup and I'm happy to ditch it in a track car.

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The 4 stud R33 rotors are not the same size as the 5stud turbo ones.

 

RDA are happy to make rotors in either 4stud or blanks, cant remember which, otherwise it's drill baby drill

Edited by Skepticism

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I know thye're different size, which is why i was trying to work out which ones to use on an S13 with 33 turbo rear calipers.

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OK got them drilled, but they don't fit the hub, they foul the little lip?

 

20160426_211520.jpg20160426_211533.jpg

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I didn't want to go do anything before raising the issue.

 

Evidently nobody seems to have actually done this themselves, ll I can find is "I just went 5 stud".

 

If need be the 5 stud wheel bearing/hub will bolt on.

 

I was worried about sanding/filing it down and having it not centre on the hub and the wheel studs taking the load.

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Ive done this the turbo disc goes on its abit tight around the centre bit but i just got it on using the wheel nuts

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Thanks for the info, lets see if I can strip some more studs...

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Thanks for the info, lets see if I can strip some more studs...

 

If you need some more clearance, just make some. Jack the rear of the car, bolt on your hubs, then idle the car with the wheels and rotors off. Either carefully and gently hold a file against it whilst it rotates, or the flat side of a disc on a running grinder. Ghetto lathe of a sort.

 

I do similar things with rods/bolts and drills, using a 1mm grinder disc to turn them down. Pretty effective if you're careful, and you get a very even grind.

 

Obviously you'll need to remove the studs before doing this, but that's just a nut and a hammer away. Takes seconds to pop them out.

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1mm disc on an Angle Grinder. For fine work I use a cutting disc, and for heavy duty work I use a grinding disc. I edited my response because I initially thought the fouling issue was on the outside, not the center hub. For the center hub I'd use 1mm cutting disc for sure.

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Unsure why there not fitting, I've done this myself.

Lightly file all the rust off as said, are the stud holes drilled straight?

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