Supra Brakes on MR2

[Jimbob]

Does anyone know if supra brakes or GT4 brakes will fit on an MR2 turbo?

How much work is involved in a conversion?

I am now in need of a set of front discs and would like to source some supra ones if I could in case I need to change the spec of my wheels I am ordering.

Cheers

[Fonzy]

Supra brakes from the uk model fit but require some fabrication, even then there are issues, i had this done but took them off due to the funny braking nature of the car, the back end was trying to pass me each time because i thing the brake bias needed changing too, so when alls said and done its probably better to go aftermarket!

[Jimbob]

Well phenoix power run supra brakes and yes it would be advisable to sort out the bias! Need a bit more reasearch.

What are the fabrication issues?

[BenF]

Dino had a serious look at fitting supra brakes to the front of his Turbo - he got all the disks and calipers etc - but in the end it didn't work out.

I'm not 100% sure why but I seem to remember issues with offsets and fitting them.

Ideally though, if you improved the front end braking you'd also need to do the rears as well to keep the brake bias right.

I've kept my standard brakes for this reason - you can get some agressive (eg Porterfield) pads for the standard setup if you want more stopping power.

[Jimbob]

I want discs all round as I find them inadequate even for standard power levels they seem much worse than my mates GT4 (ST205). Its higher speeds that worry me even around 60mph stopping seems more difficult than I would like. Plus I have a bit of a wobble on one disc. I have had all new pads but these weren't very impressive (stock).

I'm also looking at project mu discs and pads? Dont know if their any good?

Cheers,

James

[dave wall]

is yours a rev 1 or 2 mate?

mines a rev 1 and the brakes are awful....hence why I'm upgradin them next month

[Al-sw20]

Any reason why? Gen2+ brakes with upgraded pads and dot 5.1 fluid would be fine for any road use. Hard track use and you may want to switch to slotted rotors.

[Jimbob]

Well got a wobble on one of my discs now? I don't rate them though I know people say there fine but I have to disagree in my findings.

Stepping into this car from anything fairly normal and they feel great, my brother allways commenst when I let him borrow my car. However step into my mates GT4 and mine feels likes it got 4 drums not discs

Now my disc is a bit dodgy I want to upgrade, its just a choice of what to go for now? Supra brakes sound interesting as the MR2 will have a widebody so a little bit of offset wont hurt.

[John Rees]

Hi,
as far as I know its only adaptor brackets for the callipers if you have bias problems get a balance adjuster from Rally design

http://www.rallydesign.co.uk/catalog/ad ... bcc9a31102

Job done.
John

[MegatronUK]

Are you certain about the Supra brakes, the big front 4-pots from the TT? They are absolutely massive, most 17" wheels won't even fit over them. I'd have thought they would be extreme overkill on a MR2-T?

I too have been impressed with the brakes on the GT4 (albeit ST185), they stop really well for such heavy cars. How about the ST205 4 pots?

[Jimbob]

Well the ST205 is 5x100mm PCD but I suppose they might be easier than supra brakes. The supras had 6 pots on the later models! Thats what im talkin about!

Well I hear its a case of getting the distance betwen spokes and hubs? about 50mm? Dino tells me its not easy so i'll trust his judgement.

Just had a look at Hi-specs website and they look pretty good, might have a look into them. My mates got a ST205 so i'll have a gander while i'm next over his too.

I have to say though I am finding the MR2 standard items very poor. I like to compare things to other cars and if a big ol ST205 can stop a lot quicker than mine then I want some of that! They run about 315mm discs as standard I think so thats much more like what a 250-300bhp car should be running.

Thinking hat time

[MegatronUK]

6? I'm sure they're 4-pot, mine certainly are; early JDM Supes got the weedy sliding calipers all UK and late JDM RZ/RZ-S (like mine) got the 4-pots. They are huge though, much bigger in size than the ST205 4-pots. The disc is 324mm!!!

[Jimbob]

Definately saw some 6 pots yesterday. I'll try and find the link. The ST205 is only 10mm smaller with 4 pots so still big!

More research required before I make a decision

[MegatronUK]

Definitely 4-pot on the TT Supra. The 4-pot ST205 would be the one I'd go for though - smaller and more compact - cheaper to get hold of too.

Actually... scratch that, you can get replacement 4-pot Supra TT calipers from Brakes International for 60-odd quid each, as opposed to 70-odd for the ST205 4-pots (4x42.8mm diameter pistons and a bigger pad compared to 4x40mm pistons).

At least I think you can... can someone else confirm that price for me? The pricing system is wierd.

[PW@Woodsport]

john have you any idea if the supra caliper to hub fitment is the same as the celica? i guess you know what im getting at....if it is and they are £60 a pop i might just get some and have a go.

[Al-sw20]

if a big ol ST205 can stop a lot quicker than mine then I want some of that!

Hang on a second here...if you dont have ABS, or pull the fuse to disengage ABS, im assuming you can lock your wheels under hard braking?
If that is the case, you can fit the largest brakes known to man and you wont stop any noticably quicker.

I'd put my stock gen1 brakes with upgraded pads, dot 5.1 fluid up against any big brake system on an mr2, the only difference is, I'd use race slicks and I guarantee you I will stop faster

[SFLee]

I never had my car lock up yet on hard braking , wheel size using 255 on the back and the brake do feel a bit poo just wondering anyone gone over to monster siz on hi spec, since it cost roughly same as 4 pot one

[michael]

The Brakes Int prices are on an exchange basis though?

For reference there is a chap selling some of the smaller J-Spec brakes (2 pot) on the Supra forum at the moment - £50 for disks, pads and calipers.

http://www.mkivsupra.net/vbb

Or straight to it if you can access:

http://www.mkivsupra.net/vbb/showthread.php?t=32667

Should fit under 16's but lack the performance of the larger UK spec brakes.

[Gazboy]

I've just done the UK upgrade to my JDM Supe- your biggest problem will be getting wheels to fit over them- apart from UK 17's, I've found you need atleast 8.5jx18 to clear the calipers.

On my MR2, I put pagid fast road pads all round, with Black diamond 12 groove discs on the front, standard rear discs, and 5.1 fliud- 20 stops from 150mph and no probs regarding fade, over heating or warping, and they were bloody good at stopping too- recommended.

[MegatronUK]

The Brakes Int prices are on an exchange basis though?

For reference there is a chap selling some of the smaller J-Spec brakes (2 pot) on the Supra forum at the moment - £50 for disks, pads and calipers.

http://www.mkivsupra.net/vbb

Or straight to it if you can access:

http://www.mkivsupra.net/vbb/showthread.php?t=32667

Should fit under 16's but lack the performance of the larger UK spec brakes.

Thats what I'm unsure about - I can't find any indication of 'calipers sold on exchange basis only' on that site at all.