RA2x, 3x, 4x possible front brake upgrade

[o_man_ra23]

Looking at front brake options for my RA28, trawling through DBA catalogue and looking at popularly available parts, I have come up with the following possible solution.

Disks - Mitsubishi Cordia (85-89 Cordia turbo). These are a 266mm vented disk, 24mm thick with 34mm between the face of the disk and the back pad surface. DBA part number 409

Callipers - Commodore VT twin piston PBR. These are made for a 296mm vented disk, 28mm thick.

Strut - Stock. There would need to be a calliper mount made, so there is no point raiding another vehicle for the strut.

What I need to work out is whether the pad surface area on the Cordia disk is suitable for use with the commodore pad. Anyone got any detailed measurements on this?? I figure that if the holes in the disk aren't suitable for use with the hubs, then I can get new holes drilled to suit.

This setup should fit with my 14" rims without any x-factor issues. I'll be measuring the inside of my rims to check.

Any comments/knowledge to pass on??

[auto351]

Hi,
Try and find a caliper which is made for a similar sized disc, People have said to me the pistons may fall out when the pads & disc are worn to there smallest tolerances, not sure if that would occur.
Also if there is too much difference between disc diameters in use and what the caliper was made for then you will get uneven ware on the rotor.

[river]

Hi,

I've got the Hoppers Stoppers front disk kit fitted to Trini. She stops brilliantly now, and it fits on the existing strut. I think it fits on a 14 inch rim, unless you have Simmons wheels, where they have to be 15inch min diameter.

I got the HS after much reading and checking things out. I just cbf''d running about and sourcing all these bits from other cars. I wanted an off the shelf solution which would bolt to the stock struts and work without any fuss or frigging about.

seeyuzz
river

[o_man_ra23]

You need to have at least 15" rims to fit this conversion and you must fit
a 1" bore Master cylinder to obtain the best pedal feel.

Hoppers kit is out.

If anyone can suggest a different non-opposing 2 piston calliper which would be suitable?? XW through AU series 1 caliper is rated for a 287mm disk which is 24 thick. This is much closer than the VT commo, so I am wondering if there is a twin piston caliper available for these?? Will have to look into it.

[4AGTE_TA22]

Prob not quite as wide a caliper but try c4 corvette (look like they have two circles in the front of them) as they are used alot in the states for upgrade kits and are reasonably priced from the U.S.

Cheers
Dave

[o_man_ra23]

That's even worse for what I am trying to acheive Dave. Thanks for the thought though.

[Willofan]

If you are looking at spinning up a caliper mount to suit the RA strut, has anyone looked at the MA61 rotor with the Toyota Aurion TRD front twin piston caliper. I hear the Local made TRD calipers are relatively cheap. I have no basis or details on this combination, but I reckon it maybe worth a look.

[o_man_ra23]

Aurion caliper would be for a massive diameter disk, which would make the radius of the pad completely unsuitable. VT commo caliper is questionable in it's suitability for this reason. BTW, RA60, MA61 and RA65 run the same disk, which is a 258mm vented unit, much smaller than the 266 unit on offer from the Cordia.

[o_man_ra23]

Aurion disk - 296mm diameter, 28mm thickness (same as VT Commo)

RA60/MA61 disk - 256mm diameter, 20mm thickness

[Omegaman]

Owen, try here http://www.toymods.org.au/forums/showthread.php?t=62461 from Bazooka
he uses Ford transit disc at 270 diameter, 24mm thick. (DBA828)
just another option.

[o_man_ra23]

Thanks, but not transferable to 4 stud

[TheStitt]

I've got AU ish PBR calipars I want to sell. Happy to take pics for you.

they where on a 330 mm rotor on the crown

[o_man_ra23]

Sounds like they are more BA ish, or are FPR type calipers, which are designed for too big a disk for what I need. Am going to look on a cordia forum and see what the stock calipers for the AC turbo are like...

[o_man_ra23]

Now I have a canundrum. Do I keep investigating possible solutions, or do I sell the 14's, get a set of 15's or 16's, and put on Lancer Evo 3 brakes?? The Evo brakes run a 276mm disk, most of which is pad surface, which is 24mm thick, for under $200 a pair of slotted rotors can be had, and they run a 2 piston non-opposed caliper with near limitless pad choice...

Basically the only box the Evo brakes don't tick is the one about the rim size I was planning to make a custom caliper mount anyway.

Thoughts?

[river]

Hi,

16s look great on 28s and they give you a much better selection of tyres, as well as open up more options for brake upgrades.

seeyuzz
river