Shots of my old rotors

[norvalwilhelm]

The arguement goes round and round on cracking rotors if you drill them.
These are shots, not cleaned up , a typical area on my 10 plus year old drilled rotors.
I have run metalic pads with them but mostly stick to organic pads.
Each row of holes runs in the same groove so cracking is not checked but in my 4 rotors you can not find a single crack. Even the hubs don't escape drilling.
These are the front rotors, the backs are just as good
Two shots of my old rotor. This was drilled more then 10 years ago and is 3 pounds lighter then stock.

 

[Ken]

All I can say is you do good work!

 

[67HEAVEN]

(There's always a Canadian connection.)

 

[RodsnRides]

Patience IS a virtue...

That is some impressive work. 3 pounds each is a significant amount or rolling mass. I hesitate to ask how many hours you have invested in each rotor...

Nice job.

Rick

 

[81 Corvette]

if you got a sec, you wanna do mine

 

[norvalwilhelm]

That is some impressive work. 3 pounds each is a significant amount or rolling mass. I hesitate to ask how many hours you have invested in each rotor...

Nice job.

Rick

Those old rotors don't have that much. A rotory table on the mill probably does it in about an hour, then there is drilling the hat, deburring etc. It all adds up.
MY new rotors took me 4 1/2 hours to do one.

 

[Fuelie]

Great shots Norval,

Three pounds is a serious weight loss on one component from just drilling holes.

 

[Mac]

Aren't cross-drilled rotors supposed to run coolers as well? Dual advantages of unsprung weight savings and cooler braking makes sense to me!!

-Mac

 

[jwilliams]

Do you road race? Autocross? Track days? I ask because the consensus seems that when you do these activities is when you'll crack a drilled rotor. Ten years on a set of rotors seems like a long time if you're driving the car hard on a track. I have seen drilled rotors crack when subjected to extreme heat. I've seen stock solid rotors develop surface cracks from excess heat, primarily on full size pick ups that are towing/ hauling and often overloaded. Never seen anyone drill the hat of a rotor before though.

 

[norvalwilhelm]

Do you road race? Autocross? Track days? I ask because the consensus seems that when you do these activities is when you'll crack a drilled rotor. Ten years on a set of rotors seems like a long time if you're driving the car hard on a track. I have seen drilled rotors crack when subjected to extreme heat. I've seen stock solid rotors develop surface cracks from excess heat, primarily on full size pick ups that are towing/ hauling and often overloaded. Never seen anyone drill the hat of a rotor before though.

I don't race anything. I do drive very fast on back roads but drive smoothly. I do not panic stop from those high speeds. I have tried 3 repeated panic stops from 100 mph just to test pads for fade but other then that I am very easy on my brakes.
I have too much time and money invested in the car to drive it like I stool it.
I do enjoy taking the wife and just driving somewhere. I will not street race either and if someone /which they don't/ they seem to know not to mess with my car/ but if they did I would not run hard/ just play a little but not put much effort into it.