RX7 Brake Kit w/ Corrado Rotors?

[Silver Surfer]

When I was test fitting my RX7 brake setup I noticed that the rotors were loose even with the wheels mounted. Is there a spacer that is supposed to go in between the rotor and the hub? I'm afraid that the rotors will wear unevenly if they aren't solidly mounted on the hub. I have searched quite a bit to try and find the answer, but haven't found anyone else with this concern...

[e30etr]

Hi,
did you shave center bore by 1mm?

[Silver Surfer]

The center bore had plenty of room over the hub...

[golde30]

yah but the hub on most bmw tapers outward at the base. if you look at any rotor or spacer they are beveled.

[Silver Surfer]

K, Thanks I'll double check it when I get a day off.

[brent5631]

There are two bores. The one for the wheel and one for the rotor. If you didn't get the rotors machined then it won't work.

[Silver Surfer]

I bought the kit from Monkeyman and he said the rotors were milled out. http://www.r3vlimited.com/board/showthread.php?t=294247

[Silver Surfer]

Hubs might need to cleaned...

[brent5631]

Ok. Then sometimes if your wheels don't have a big enough chamfer in the back They may not fully seat on the brakes because the corrado rotors are thinner. That's why the massive kits include a 1mm rotor spacer.

[Silver Surfer]

I am running adapters with this kit as well. Would that affect them? Turner Motorsports 4x100 to 5x120 30mm

[brent5631]

Check the adapters and make sure they tighten down to the rotor face fully.

[Silver Surfer]

Adapters were flush on the wheel center bore

[Silver Surfer]

Ok so when I got home I forgot that I had some front struts lying around, so I test fit the rotors again.

The center bore is definitely shaved 1mm.

Mounted with Adaptec adapters there is >1mm gap between the rotor and the adapter.

Then I remembered my brother has 8380 adapters lying around and they have a tapered center bore. Adaptec on the left, 8380 on the right.

8380 adapters mounted have <1mm gap between the adapter and the rotor. I would feel alot better mounting these with the Corrado rotors.

I am going to contact Adaptec and see if they can taper the center bore to fit the E30 better. Need to get a little thicker adapters for my stance anyways.

[golde30]

Shouldn't even be .5mm between rotor and adapters, with the adapter bolted onto the hub, it should be putting 80ft/lbs against the rotor surface against the hub.

[Silver Surfer]

Thanks golde30, I'm gonna see if I can track down a 1mm rotor spacer then. The adapters were put on very tight to test fitment on rotor.