Brake Caliper Clearance

[spdntckt]

Question for all of you.. What is the minimum recommended clearance from the caliper to the face of the wheel? I currently have approx 2.5 MM between my AP Racing caliper and my VOLK TE37 (40mm offset) (using 7.5MM spacer). I am thinking of having a custom 6mm spacer made, but that would only leave approx 1MM of clearance.... I know that wheel bearings/etc will have a small amount of play during extreme cornering/etc - so i am wondering if this falls within an acceptable range..

(Why do i want to do this, by the way... I need about another MM of clearance for the new S03's to clear perfectly... there is a very slight rubbing as it sits today.)

thoughts?

 

[NSX 3.0]

I had a custom 2mm spacer made for my Volk GTCs to fit over my Stoptech BBK. I was told that if you fold a piece of paper in half you should be able to slide it between the rim spoke and caliper without touching. BTW I was at the track yesterday and had no problems rubbing or the rims touching the caliper under cornering and hard braking.

 

[tunapie]

Mine have 2mm tops with the Brems. The only problem you might have would be a rock getting in there if you slid off the track. Dan

 

[Zishan]

Mine have 2mm tops with the Brems. The only problem you might have would be a rock getting in there if you slid off the track. Dan

This maybe a dumb question, but what would happen if a rock did get in there?

I'm curious because with my custom wheels, I don't have much clearance either.

Regards,
- Z

 

[spdntckt]

I never really thought about the rock thing..i guess its possible.. would probably just scratch and ding teh shit out of the inner wheel and outer caliper... doubt a small rock like that would cause any sort of lock up...

mostly i just want to be sure that there is enough clearance that under stress things dont flex, and catch... i know of one guy with a vette who was heading down hwy 280... going about 140. He hit a bump and the spoke collapsed, caught his caliper, locked up the wheel, and he spun out..
he cant drive any more..

anyway.. that's extreme... plus the forged volks have super-strong spokes, i think the rim would collapse far before the spokes did..