Brake upgrade for ST205 gt4

[raynman]

Just wondering has anyone thought about a brake upgrade for a Celica GT4 ST205?

Obviously would be running bigger rims that the standard 16s

[Rodger]

Personally, in order of ease of work and performace level.

For a road car that can be used for track days and supersprints:

step 1) Good pads EBC or Ferodo, braided lines and good fluid.

step 2) Then I would swap to DBA 4000 series rotors as a straight replacement. DBA4560SL and DBA4560SR.

or) Find a bigger diameter rotor of the same width, the DBA catalogue has all the dimensions of all rotors they make. Then make an adaptor bracket to move the OEM four spot calipers out. A ten millimetre increase in diameter makes a big difference in braking performance.

The rotors off the JZA80 four pot caliper series Supra, a DBA4718, maybe easiest to adapt. They are 323mm dia (ST205--315mm), 30mm thick (ST205--32mm) but not as high overall 50mm as opposed to the ST205 at 59mm.

or) If you are building an all out track car I'd look for a complete Brembo or Alcon or one of those Japanese rotor and caliper kits.

Regards

Rodger

[raynman]

forgot to say - Grp N Corolla rally car for Tarmac. Got bigger rims, so looking at bigger brakes

Thanks, will look into that (and check about the rules)

[Rodger]

Well then for a Corolla and Group N would mean keeping the standard brakes perhaps only a change to the DBA slotted/cross drilled standard series rotors, braided lines and better pads are allowed.

You do need to look into the rules. Targa rally rules differ slightly from CAMS Rally rules as they have some more classes with more modification freedoms, but I believe Group N is Group N in both forms of this motorsport.

So are you saying you have ST205 GT4 brakes already on a Corolla?

Regards

Rodger

[raynman]

Group NP corolla - one of the ex-TRD ones with a ZE122 bodies on the GT4 drivetrain. I was just seeing if there was an easy toyota parts bin that we may be able to sway but looking at the above I am not sure anymore

Would have to look into slotted - cross drilled are a bit of a problem we have found in the past.

[Classique71]

hmmss - the 205 brakes are the second largest options made from the factory outside of jza80 TT ones by memory - they shuld be highly suitable for your needs ? Whats bates running on his these days ?

I know a few giys in europe have foen AP racing custom items but nheed a 17 to fit - and most bigger brembo items weve put on our gt4's have needed 17's as well

Sounds to me if you want bigger stoppers its a custom 2 pc rotor - on a modified strut bracket , to take say a STI WRX brembo -

[Rodger]

I agreee have a talk with the boys at Bates' shop here in Canberra.

Regards

Rodger

[raynman]

Don't worry about that, we are. Just looking to see if there were any simple swaps out there. They might have something, still waiting on wheels as well.

[Squid]

The Bates corolla's use ST205 brakes mounted on ST185 hubs, with milled down discs, 1mm off the mounting face and a 4mm spacer. I have a set in my garage to go on the 165.

Not sure about the S2000's.