beerhead Posted September 30, 2007 Report Posted September 30, 2007 (edited) I've found a rotor for an RX-7 4 piston brake upgrade that's an exact fit to an AE86 hub. The thing is, an AE86 has a 64mm ID hole with a 45 degree chamfer on the edge, the rotor in question has an 80mm ID hole and a chamfer too. I wonder if this is done on other cars? I wonder if this sort of thing increases the chance of failure... Edited September 30, 2007 by beerhead Quote
love ke70 Posted October 1, 2007 Report Posted October 1, 2007 could get a ring machined to fill the gap... Quote
towe001 Posted October 1, 2007 Report Posted October 1, 2007 Here's one reason why you'd what to run either a proper sized center hole or machine up a ring http://planetsoarer.com/offset/studs.htm Quote
irokin Posted October 1, 2007 Report Posted October 1, 2007 Danger Will Robinson! Don't even bother trying to make it fit. If somethings not perfect with brakes they chuck a hissy fit, I know this from personal experience. When my rotors were redrilled to 4 stud (by an engineering workshop) one hole was off by less than a millimeter. The rotor is difficult to get on and off, and the lone rotor vibrates during brake applications above 160kmph. If I put it on my 5 stud hubs the problem goes away so the rotors not warped. Quote
MRMOPARMAN Posted October 1, 2007 Report Posted October 1, 2007 just buy the rotors as blanks, and get an engineering shop to machine the holes to desired size Quote
beerhead Posted October 3, 2007 Author Report Posted October 3, 2007 The disc has the correct 4x100 pattern for the back of a hub from factory. I reakon a spacer ring would be sufficient as the holes should be in exactly the correct spot. BTW Ironkin, find a new machine shop :no: Really shouldn't be a drama doing a 5 stud to 4 stud adaption on a skyline rotor, lame machine shop. Quote
irokin Posted October 4, 2007 Report Posted October 4, 2007 BTW Ironkin, find a new machine shop :no: Really shouldn't be a drama doing a 5 stud to 4 stud adaption on a skyline rotor, lame machine shop. Haha yes well... at least the second one they did they got right. I wont have a need for 4 stud rotors soon so I'll just buy new ones. Quote
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