My cross-drilled rotors are pretty tatty. So, I went to a local brake shop today & the manager said cross-drilled rotors can't be turned. Spoke to another MG guy & he believes they can. Logically, I
the rotor lathes i'm familiar with use a tiny hardened bit that machines the rotor by flaking off tiny chips leaving a (what looks like a concentric set of circular groves) spiral grove pattern on t
What vintage group is allowing cross drilled rotors? - I wanna join. Don Queen norm, the rotor lathes i'm familiar with use a tiny hardened bit that machines the rotor by flaking off tiny chips leavi
I've never heard of a vintage group that wouldn't allow you to cross-drill rotors. As far as turning them goes, I wouldn't hesitate to put them on my lathe and turn them. It's a simple interrupted cu
And rotors are iron, not hardened steel, so shouldn't hurt the tool. As long as you are just cleaning them, it should be OK. Best rotors though are ground, which the holes shouldn't affect at all. Ro
Maybe it's a West Coast issue, neither CSRG, VARA or SOVREN will allow cross drilled rotors. I've never heard of a vintage group that wouldn't allow you to cross-drill rotors. As far as turning them
OK, now that we have all pooled our ignorance, here is the straight scoop on drilled rotors and turning same, right from Brake Materials and Products. No problem in turning (cutting, dressing) any dr
cross Or perhaps it's a safety issue, for reasons previously discussed. It's my recollection that the underlying principle of the rules in the 60's was: Removing metal was OK; Adding metal was not al
We (SVRA) have no restriction against drilled or grooved rotors, or brake drums for that matter. Were did this idea ever come from that this isn't acceptable. Even back in the fifties there were race
Did I say VARA ? I meant HMSA and General Racing Maybe it's a West Coast issue, neither CSRG, VARA or SOVREN will allow cross drilled rotors. I've never heard of a vintage group that wouldn't allow y
Larry, Brian and others, I wouldn't call Brian a hotdog. You or I have never seen him machine anything. He may be quite competent, maybe more so than your brake guy. I would agree that you could get
Larry, I'm the "ignorant hot dog machinist" that you refer to. I hope we never meet on a track, as I find your attitude somewhat lacking in the basics of politeness. I take offence when people - you
One more item on cross-drilled rotors: they crack and chip like all get-out. The spiffy "cross drilled" rotors that Porsche uses (and aircraft manufactures for that matter) actually have the holes ca
machinist, IMHO rotors are generally ground when manufactured new and turned on brake lathes when worn, which cuts both sides at once to prevent taper and runout of one side with respect to the other
Ok one final word on the rotors. If I offended anyone I apologize, but you were getting fed some bad information by several sources. I took the time and trouble to call an expert on the subject to ve
I am truly surprised. I always thought it was only the "What is vintage racing?" thread that people were ready to fight about. Doug Meis (very solid rotors. I'm afraid I might start a fight if I trie
Hey NB, I know just enough about everything to be dangerous!! Cheers, I'm sorry. I didn't realize this was the vintage race list. I just wanted to meet Larry. He seems like an expert on everything an