erichg1000

Wanting to run a drift practice day at PPIR tomorrow and there are no rotors to be found tonight. I'm dumb for not checking sooner but what do you guys think about these cracks. Knowing that drifting doesn't use the brakes as hard as straight track days.









I might have to not go to the track tomorrow! Dumb dumb i ordered fresh fronts for backups but not rears.

ErnieN85

depends........ can you walk home?
I'd get some more cooling to the next set.
Hint take a look under a BMW Lil scoops

erichg1000

these are the rear rotors BTW. I do have spindle ducts and front facing intakes for the front brakes.

How many people are doing spindle ducts on the rear for track days?

brkntrxn

Run them. I would.

ErnieN85

not many as the stock (C6) does blow in the right spot although the air intake for the vents is on the outside and the duct blows on the inside. I put a air dam on the intake below the rocker and it did cut down wear on the rear pads quite a bit. for low speed i wouldn't worry about them either
but one crack is all the way to the edge

froggy47

I don't recommend it, but I probably would.



Drift is not like 150 on a track.

Same like autox, I would.

pkmoose

I would run it and not worry about it at all.

hungryhippo

Not that I make the best decisions, but i would

Supercharged111

I would too. I've legitimately cracked a couple rotors, and that looks like it won't shake that bad if at all. If my friend doesn't punk out, I'm looking to spectate tomorrow.

jasonberkeley

Do not run rotors that are cracked all the way through to the outer edge. If you MUST, drill a small hole at the point of the crack, which will help eliminate the stress riser.

Supercharged111

Are you unaware of how not hardcore grassroots drifting is? The car won't cease to stop.

Timz06

Do you need brakes for a drift event? That wouldn't bother me at all.

sebdavid

I'm with the rest here, those cracks on a rear rotor for a drift event wouldn't bother me. Do the brakes even get hot during a drift session? Just keep checking it throughout the event.

Bill Dearborn

I wouldn't run those on the track but would drive home on them. Have had rotors go from heat checks before a session to cracked from the outer edge all the way to the hub after the session. If drifting is like the drive home then run on them. If drifting puts a lot of heat stress into the rotors like a track session does then don't run on them.

Bill

erichg1000

Thanks for all the feedback y'all. The rotors did not blow up! And, I find as hypothesized, drifting does not stress your braking system at all. It does stress your cooling system though... I'm reminded of a flight instructor telling me not to forward slip for a long time as it starves the motor of air flow.