I am looking at putting 4 wheel disc brakes on my 69 camaro. I was talking with Baer Racing about some of the systems they sell. They say that you can use the slotted & crossdrilled rotors on the street and for autocrossing. I thought one should stay away from crossdrilled rotors. Does anyone have experience with crossdrilled rotors? Does the Baer ones with a Zinc wash plating make a difference?

Thanks,
Kevin
69 Pace Car
69 Coupe - LT4, T56

Crossdrilling helps vent hot gasses from the surface of the brake pads. You used to see it a lot on race cars. After that, there were a lot of rotors that were slotted to vent the gasses, McLaren used that method and they used AP brakes. I'd go with slotted rotors or none at all.
There is little or no benefit for a street car.
The reason people get away with drilled rotors on the street is that they don't use them as hard as road racers do. So they paid a lot of money for something they didn't need, and if they did need it, it would ruin their rotors in a short time.
I spoke to a crew member of Peter Gregg's Porsche Imsa car. He said the drilled rotors lasted two races, and cost $250.00 each! He said cracks would origonate at the holes and eventually crack the rotor.
I later asked an expert at Tilton, he admitted drilling the rotors greatly shortened the life of the rotors.
There is no benefit to the plating. It will wear off the where the pads ride right away. i would guess the plating might be a detriment to the pads performance.
Also, make shure the rotors you use are legal for the autocross class you run.

[This message has been edited by davidpozzi (edited 03-28-2000).]

Hey, David. Thanks for the information. I spoke with Baer again. They said if I was going to autocross or run a road race track every once in awhile that I should not use the crossdrilled rotors. They can not handle the heat that builds up in the rotors. It sounds like I will just go with a non drilled or slotted rotor.

Kevin

with todays brake pads, running rotors with holes are more for show than anything else.
Kinda like chrome, looks cool http://www.camaros.net/forum/cool.gif but...
does it really do anything for the cars performance? http://www.camaros.net/forum/biggrin.gif


[This message has been edited by Toby T. (edited 04-05-2000).]

I wouldn't spend extra for drilled rotors, it's more for looks. The slotting will only be of benefit if you get up to super high temps. Probably about 1100 degrees.
David