jayroc

Do you REALLY wanna go with 5x4.5? 4x4.5 should yield some good rim choices and be less trouble in the rear..
My eventual plan for this project will be to use a FC 4 lug rotor with the 4pot calipers and keep 4x4.5 all the way around and go with a set of Konig Rewinds if I ever get some money..
I need to double check and make sure about the 4 lug rotors and 4 pot calipers, but I am pretty sure I read it`s doable..

jayroc

Okay, I just read something interesting.. It seems that the 5 lug FCs with 4 pot brakes use a 10.9" rotor, and if I'm not mistaken the GSL-SE rotors are 10.9"... All the way around, too.
So, for those of us with GSL-SE brakes, is it as simple as fabbing a new caliper mount bracket and getting two 4 pot calipers???
I have a set of GSL-SE rotors at home, but I can't get to them until the weekend. Can somebody verifiy the 10.9"/277mm diameter? I can seem to find it via search.

jayroc

Actually, I don't suppose using the dust shield off a 5 lug FC with 4 pot brakes would fit on a GSL-SE spindle? Damn, that would be sweet...

jayroc

One more thing.. The rotor thinkness is different according to the FSMs.
FC rotors are 22mm in thickness while the GSL-SE rotors are 18mm. Is this something to worry about? Seems like it'd work, though the FC rotor IS ~20% thicker and can wear 2mm where the SE rotors can only wear 1mm and still be in spec.
Also, given the weight difference I don't think the brakes would heat up as quickly as they would on the TII, so maybe the thickness value is negligable? What do you guys think? I am thinking along the lines of something like running on a SCCA track event, normal driving shouldn't be a problem, I would think.

ducktape

I'm in the same boat. I have a beautiful complete front suspension from a TII, and I really want to see these brakes on the front of my -SE without dumping my wallet out for adapters. I really don't have anything new to add, other than there appears to be a lot of travel in the TII pistons. What if you were to make a 1.5mm shim for each pad? That would displace the extra rotor width.

/Did you ever find out if the rotors were the same diameter?

Dysfnctnl85

iTrader: (11)

I've already acquired the parts and am waiting on an inner bearing adapter so I can put the FC 5bolt hub on my spindles.

On a side note, if anyone buys the CP Racing kit you should seriously shoot yourself, I don't see how it's economical in the least to buy that "kit." Just lookup a competent machine shop and get the labor and parts machined for <$100.

jayroc

No, I didnt find the sizes, only posts from a 323 board about them being 10.9".. I'll have to wait until the weekend to get home and measure the ones I got.
Even if the FC backplate doesn't fit right, I wonder how difficult it'd be to create a hybrid plate out of the two, or just have a new one stamped. I dunno how much that kind of fab work costs.
I would really like to keep the dust shield 'functionality' as opposed to just getting an adapter, but an adapter can be made easily enough..

jayroc

Oh, yeah, and if a custom backplate could be made, having a spot for vents would be a really nice feature too..
Does anyone have pics of a mazdaspeed vent setup?

Dysfnctnl85

iTrader: (11)

Having a backing plate stamped seems pretty simple and if you have the design CAD'd out, any competent shop should be able to cut that very cheaply.

Pele

iTrader: (28)

The 4 pot/5 lug FC brake rotors are LARGER than the Single pot/4 lug FC rotors...

The Single pot/4 lug FC rotors are the same size as GSL-SE 1st gen.

I'm going to be running FC front spindles (And suspension and R&P...)


I wanted 5 lug all around, but it looks like I'm gonna either have to use adapters out back, or make a custom axle...

jayroc

Ah, crap, that's right.. They use the same size pads don't they? 9.8" I am pretty sure..
Well, maybe there is another 4x4.5 10.9" rotor/hub combo out there that is usable? hmm...
I really wanna keep 4 lug.