stick

Can you feel ridges/bumps when you rub your finger across the rotor?

houstonT

Yes, VERYYYYYYY minor, but I feel them. The two front rotors are a tad worse than the two rear rotors. There is no vibration when braking and no other "signs" that something is not right...
Peter

lobuxracer

iTrader: (2)

Give me some time. I've only got 1k miles.

houstonT

Thanks Lance...anyone else??? Come on, I know others out there have 10k + miles!
Peter

BigMikeISF

Haven't seen anything like that. I'm not even at 7k yet. Have you had it checked out by the dealership yet?

FPR1939

Peter,

Checked mine when I washed it this afternoon. Slight concentric discoloration but no real grooving. I suspect you will find that the shallow trenches are located in the same location as the cross drilling of the discs.

Pat

houstonT

Thanks for the feedback guys... I had the car in for 15k service this past week and they checked the amount of brake pad that was left and didn't mention anything about the rotors. Of course that doesn't mean much...
Peter

FPR1939

Peter,

My car has 18k miles on it now. Once you get the Joe Z duals are you going to ARD to Dyno?

Pat

houstonT

Pat, I had my car dyno'ed at Hennessey Performance Engineering originally and in order to maintain as much consistency as possible I'm going to go back there to re-dyno.
Peter

FPR1939

Had my son's 2007 Tundra truck dyno's at ARD when I had the ISF dyno'd. Pretty much of a beast for stock truck. 325 rwhp and 330 ft-lb rw torque.

stash84

someone at the lexus dealership told me the other day that we CAN resurface the rotors as long as they dont have a lip. i wish i would have known that a few months ago. mine have a lip now

BB/F

Like all vehicles, the rotors should have a minimum thickness spec on them. As long as the rotors exceed that spec, you can turn them. There is no reason to replace the rotor every time the brakes need to be done. I will say I've never done the brakes on the ISF, but I've done brakes on tons of other cars including the Z06 I used to have and I dont see why the ISF will be any different.

The lip doesnt matter as it will be cut off when the rotor is turned. Every car gets this lip.

lobuxracer

iTrader: (2)

Just thought I'd post something for all the drilled disc champions out there. Here's what Lexus says in our Factory Service Manual about the drilled discs (I've never seen this for undrilled discs anywhere):

Joe Z

iTrader: (10)

^^ Ah yes. Stress & Heat cracks.. Gotta love those....

Generally speaking -> A very popular side effect for drilled rotors after repeated abuse... (Like Race Day)



Joe Z

BigMikeISF

Good stuff Joe Z and Lobux, thanks for posting those. It lets everyone know what they should look for when they're checking their brakes