To those of you with the StopTech kit - how many DEs are you typically getting from a set of rotors? I've got four events on mine and StopTech is saying that based on the cracks I've got that I have maybe one more event left. I have the slotted rotors and I've been using Hawk HT-10s for all my events and I have the OEM ducts opened up.
I got about 7 days on the Stoptech rotors before I noticed some hairline fractures around the holes. There was still plenty of "meat" left on the rotors however.
If I remember correctly .... you have slotted rotors. I would imagine you have a bunch more left on the rotors since they are not drilled.
My pads were worn after 10 days .... I would expect that the rotors would last twice that.
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Harold
'07 M5 Silver Grey - 6MT
Hairline fractures are normal with cross-drilled rotors after hard use. I knew it was going to happen .... just not that soon. I do brake pretty hard .... and late.
They don't need to be replaced until the fractures begin to come together .... then the rotor will begin to be dangerous to use.
Some rotors do tend to last longer than others. My next set of rotors will be slotted for the Brembos.
Originally posted by HaroldC Hairline fractures are normal with cross-drilled rotors after hard use. I knew it was going to happen .... just not that soon. I do brake pretty hard .... and late.
They don't need to be replaced until the fractures begin to come together .... then the rotor will begin to be dangerous to use.
Some rotors do tend to last longer than others. My next set of rotors will be slotted for the Brembos.
How's the car search coming?
First, regarding the brakes - how much is it to replace the rotors?
Second, regarding the car - I just made the decision on the car thing one hour ago. Do you want to know what I did or should I surprise you???
If you want to find out, I'm posting it on the Limerock thread.... Aw hell, I got the M3!
Just for reference - my Porsche Turbo has the Porsche "Big Red" brakes. They are the "gold standard" by which street brakes are measured, and they are in fact awesome.
But mine have 6 days of DE om them, and they indeed show plenty of hairline cracks propagating from the holes.
After switching back to the street pads and wearing off some of the transferred Pagid compound, you can see a good bit more than was visible when I took this photo:
So - we may ALL be disappointed with what "normal" is after heavy track use.
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'00 M5 - The Ultimate Ultimate Driving Machine! Greg's M5 Page
'01 996 TT - Greg's Porsche Turbo Page
'00 A6 4.2 - doesn't deserve a web page
Originally posted by Sydude First, regarding the brakes - how much is it to replace the rotors?
The StopTech 355mm x 32mm rotor replacements are $238 each. Slotted or drilled is the same price, although I suggest slotted if you plan to track the car.
You can use the drive pins and bolts over again once or twice, but it's not unusual to strip a bolt when removing it due to the red Loctite and the Inconel spring washers can flatten. My suggestion would be to buy a Hat Mounting Kit for each new rotor, which consists of replacement drive pins, Inconel washers, bolts and Loctite 294. (That's a special "wicking" Loctite that is applied to the ends of the bolts AFTER they have been installed and it wicks into the threads. Hat mounting kits are $40 each and are good for one rotor. At the very least, you should have one hat mounting kit on hand in case you damage something while swapping rotors. That way your car isn't down while you wait for parts.
2001 540i 6-Speed
StopTech 4-wheel big brake upgrade (ST-60 front/ST22 rear)
M5 3.15 Limited Slip Differential M5 Front Swaybar
Dinan Stage 3 Suspension
Dinan Front Strut Tower Brace
Rogue Octane Short Shifter & Transmission Mounts
European Dash Conversion CDV Deleted (of course!)
Bluetooth, NAV-TV, DVD Player
2006 Chrysler 300C SRT8 w/StopTech ST-60 front/ST-40 rear BBK 2007 Corvette Z51 Coupe 6-Speed w/StopTech Trophy ST-60 front/ST-40 rear 2009 Honda Fit Sport w/NAV w/Acura Integra front calipers, StopTech floating rotors on order
Dave - in other applications with Loctite, I know that the following works, but I wanted you to "bless it" before recommending it here. I don't know enough about the metals involved to know if this is safe. In any case, you heat the bolt real hot (close to red) with a torch, then give it a whack with a hammer. (Just one.) When it cools, it should back right out.
Originally posted by greg Dave - in other applications with Loctite, I know that the following works, but I wanted you to "bless it" before recommending it here. I don't know enough about the metals involved to know if this is safe. In any case, you heat the bolt real hot (close to red) with a torch, then give it a whack with a hammer. (Just one.) When it cools, it should back right out.
Bless you my son.
Yes, you can use heat, but gently. Don't heat them to the point of glowing.
Why the heck doesn't stoptech offer solid (non-drilled, non-sloted) rotors for people serious about track use ? slotting and drilling is mostly for looks and obviously weakens the rotors.
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