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Brake Upgrade Brackets

pipster11

By pipster11,
in Fabrication

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pipster11 Grand Master

pipster11

Posted
Posted

Hey guys

just wondering if anyone has some sort of cad file for some brake adapter brackets

looking to upgrade the brakes on my car and was thinking of rendering it up on catia (what my uni uses) or inventor (students get a free download)

i'm thinking that i'll make a bracket to run GTR brambo rotors with r33 callipers (bought what i thought were r34 callipers for my stagea but they are 12mm bolts not 14 like mine so now i have callipers i cant use etc)

I should also have access to a laser cutter too

But before i start i thought i would ask if anyone has some already on file (can change mounting bolt hole sizes easily if the are 12mm currently)

Also trying to work out weather to make it an L shape bracket (not with a 90° bend but like 30°) or a dog bone shape (holes almost ontop of each other, just offset a little)

Thanks in advance if you can help,

Tom

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J'z-R33 Grand Master

J'z-R33

Posted
Posted

If im readig this correctly.. you want to put R33 GTR brembo brakes on your Stagea?

You can use the 12mm bolt and put a sleeve in the bolt hole to run the calipers... not need for brackets etc.

More here:

http://www.gtr.co.uk/forum/117575-replacin...s-what-get.html

pipster11 Grand Master

pipster11

Posted
  • Author
Posted
I personally dont like brackets, get a sleeve turned up as per J's post.

I have the same issue, R32 gtr callipers to go onto my 14mm M35 mounts. I have a lathe to turn them up though. :)

find some stainless pipe with 12mm id and 1mm wall thickness then cut to length

sorry guys, i have r33 gts25t callipers and can get brembo rotors for $250

so instead of messing around with adapting to run 296mm rotors i wanna run 324mm rotors then have a bracket with 14mm bolt holes for the stagea and 12mm bolt holes for the 33 calliper

  • 1 month later...
Rowdyr32 Mentor

Rowdyr32

Posted
Posted
the gtst calipers wont swallow anything larger than 300mm rotors anyhow...only around 3/4 of the disk gets used with the 324mm ones

I made my own adapter to run the 324mm rotors on my 32gtst about 8 years ago before I had even heard of anybody else doing it. I was a piece of piss. I think I used around 6 or 8 mm plate and a couple weld on spacers. Took a little while (few hours) to get the wooden template right and about an hour to make. Obviously had been done by someone somewhere before me as it an easy upgrade.

The gtst calipers are almost the same length pad as a brembo and the only real difference is the brembo pad is about a 1/4 inch higher.

Go the bigger dia. Its a 10% bigger dia. Don't think Zebra gets it as what you want it is the extra braking force from the larger dia disk plus they run cooler since they don't have to do as much work. UAS sell the adapters.

pipster11 Grand Master

pipster11

Posted
  • Author
Posted

found someone willing to post some 34 brakes so will be going for those and sell my 33 callipers (or put them on my 31, but i dont think it will clear the wheels)

would be nice to make this up but its gonna work out cheaper to do the 34 brakes if i can sell my 33 callipers off

  • 4 weeks later...
skylinegtts Experienced

skylinegtts

Posted
Posted

quick question for you guys,

do you do any calcs to determine the thickness and rigidity of the brakets? if you did, what method do you use to determine the brake forces and such?

or is it based off experience?

samstain Enthusiast

samstain

Posted
Posted

generally you can do it off experience, just make sure its strong enough that the original bolt is going to be the first thing to break, and its stiff enough not to vibrate or do anything dodgy. There really isn't as much force going through brakes as most people probably think.

Rowdyr32 Mentor

Rowdyr32

Posted
Posted
As said above 324mm rotors really dont work with r33 calipers, as the curve of the caliper is wrong. Even after modifying the caliper(which is pretty dodgy), the pad still hangs off the edge of the rotor

I don't have any pad overhang or if I do it 1mm and I haven't modified the calliper. You must have had some dodgy brackets!

All you geeks have no idea. Why is it dodgy. It works fine and is the cheapest upgrade you can do. Make some free brackets or waste over 1k on brembo's just to hava a brembo badge. Stop touching yourself. I wouldn't even care if I did/do have overhang. It would make changing the pads and disks easier because they don't get caught on the lip of the disk.

Are the std brakes dodgy becuase they don't optimise the whole disk because there is a 1-2mm area on the od that doesn't get used.

Dodgy my arse!!!

Sydneykid used to use this bracket on his track cars and I have also cut a lot of laps with homemade and bought brackets and never had a problem.

Duncan Grand Master

Duncan

Posted
Posted

easy tiger....adriano is one of the few on here who does know what he's talking about!

but like you say, different brackets might have better or worse results. certainly plenty of people have run the UAS adapters with good results. And no doubt the gtr brembos are very poor value for a small upgrade in size over standard calipers

Adriano Grand Master

Adriano

Posted
Posted

Maybe r32 and r33, gtr and gtst and z32 calipers are different in this regard. To fit them to a set of 330mm discs, we had to grind the inside edge of the caliper almost all the way to the bolt that holds the caliper together, which i consider far from optimal. This allowed the edge of the pad to be almost flush with the edge of the disc with the inside of the caliper being about 1.5mm from the disc. However maybe the calipers were different, or the pads, or even the discs possibly. We did question this at the time as i knew UAS sold brackets, and we couldnt see how this was done commercially. PS Im not sure which calipers we had(They all look the same, but i was told they were 33gtst)

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