M-spec Brake Conversion Problems, Please Help

[skyla]

Hiya all,

I've done a search hoping I might find the answer to to my problem but haven't had any luck.

I have a R32 GTS-T (non M-spec), that I have decided will get the bigger M-Spec brakes, I have my new discs, calipers and brake lines ready to be put on.

The car already has factory 5 stud hubs, so I thought the conversion would be a simple bolt up job, but this doesn't seem to be the case. After pulling the front brakes off changing the disc over and bolting the new 4 pot caliper into place every thing seemed to be ok until the wheel went on and then it wouldn't turn . The wheel is clearing the caliper so I know thats not the problem, I'm kinda wondering if the hub might be the problem???

Has any one converted their non m-spec R32 GTS-T brakes to the bigger M-Spec ones?

what problems did you have and how did you get around them?

Do I need to get different hubs to do this conversion, or am I just missing something simple?

Any help or advice would be greatly appreciated

[omrae]

The brake rotor and caliper aren't the right offset for the hub assembly you have bolted them to. It sounds like the rotor is hitting the caliper, it might spin without the wheel on but once you pull the rotor up solid it hits the caliper or maybe even some of the suspension components. Try bolting the rotor hard up against the hub without the wheel (use the wheel nuts up against the rotor, you may need washers to get the depth) that way you can see what's hitting.

[predator]

read my tutorial in the tutorial section..explains everything..

http://www.skylinesaustralia.com/forums/in...03&hl=brake+fun

great pix are gone again.. sigh.. f**king sick of uploading my photos every 5 minutes this server is changed..

[predator]

i think u might have forgot to take the bracket off..

the non m's have a bracket for the calipers.. m bolt direct to hub.. take the bracket off..

[skyla]

Thanks for the replys, much appreciated,

Predator, thanks for the Tutorial very informative

Funny enough the way it had been written down was prety much the way I tried to fit the bigger brakes, it was when the wheel nuts went on that the wheel wouldn't turn, I'll have a good look tomorrow and see if I can see the problem.

lol, and yes I did remove the bracelet, so I know thats not the problem.

Thanks

[predator]

try bashing out the stone guard.. depending on the discs it might be rubbing/pressing on the disc stopping it from turning.

I think you'll work it out, the only difference really is the actual lines.

[skyla]

Yep it was the stone guard that was stopping the wheel from turning, I attacked it with a hammer and a set of pliers and it did the trick. then every thing bolted up nicely.

Found out that the set of calipers I got were from a N/A 300zx they have slightly smaller discs and smaller calipers, than the Type-M's. It has worked out very well we can still use our old mags , didn't think we would be able to.

Now for the back brakes the factory discs are heaps smaller than the new two pot ones I have. Umm the factory stone guard is a problem I have bashed the living snot out of it and still it's not playing nice . How did you get around the smaller stone guard problem and get the bigger rear discs to fit?

Edited October 1, 2005 by skyla

[predator]

Havent done the rears yet so wouldn't know on that .. seems to stop quite well now though with decent pads on the rear, and just the 4 pots front.

Later on will probably go for R33 or GTR for rear (for the larger discs).. or maybe all round.

[skyla]

Hmmm, did only putting the 4 pot on the front up set the brake bias, or didn't it make any difference what so ever?

My boyfreind thought he would help out with the rear brakes, well they are on and every thing seems to be sweet as, but he totally wasted the rear dust shield. . I guess now I got to find out if a dust shield effects compliance chances, If it does I gota get a new one

[predator]

nah... not really any difference, it hasn't effected the balance or anything that I can tell.

lol.. sounds like something I would do.. but i think you should be right with the dust shield thing.

[Skyline-man]

has the R33 Mspec got bigger brakes then the standard R33 GTS-T?

[Duncan]

All R33 gtst are Mspec....it was only 32s that had different brakes (and front bar i think?)