Printable Version of Topic

Posted by: race914 Jul 31 2006, 09:36 AM

Doing a routine post event inspection, I found a crack in my drilled Zimmermann front rotors. Pretty much like this example




I know this is nothing out of the ordinary and I usually just replace them. However as Einstein noted "Insanity is doing the same thing over and over and expecting different results"

So considering ways to not keep replacing cracked rotors, I've noticed that alot of vendors are now listing the http://www.powerslot.com/



Anyone using these? Any feedback either positive or negative?

Posted by: Rotten Robby Jul 31 2006, 09:48 AM

QUOTE(race914 @ Jul 31 2006, 08:36 AM)

Doing a routine post event inspection, I found a crack in my drilled Zimmermann front rotors. Pretty much like this example




I know this is nothing out of the ordinary and I usually just replace them. However as Einstein noted "Insanity is doing the same thing over and over and expecting different results"

So considering ways to not keep replacing cracked rotors, I've noticed that alot of vendors are now listing the http://www.powerslot.com/



Anyone using these? Any feedback either positive or negative?

Posted by: brant Jul 31 2006, 12:41 PM

I'm using them on front and rear of our race car.
I like them.
my organization (vintage) does not allow cross drilling
and my race shop likes slotting better than drilling anyways.

my rear rotors are solids instead of vented (again due to my clubs rules)
we had the rear solid rotors hand slotted

Let me throw in a picture:



brant


Attached thumbnail(s)

Posted by: sww914 Jul 31 2006, 03:19 PM

I've had the same experience as the one described in the ad you quoted. I've seen a cross drilled rotor that broke all the way through, 1/3 of it flew off at speed, and blanked up a lot of expensive pieces on it's way out. I think that cross drilled are superior, but only if you can afford to replace them often.
I can't.

Posted by: race914 Aug 1 2006, 08:26 AM

Thanks to everyone for the feedback.

I think I'll try the powerslots.

I have always had good braking performance with the drilled Zimmermanns (up until they crack) but I'd rather not be replacing rotors so often.

Does anyone recommend the additional cost for the http://www.powerslot.com/pages/power_slot_cryo.html?

Is there really a return on investment for this?

Thanks again for sharing your experiences!

Posted by: Rotten Robby Aug 1 2006, 09:16 AM

QUOTE(race914 @ Aug 1 2006, 07:26 AM)

Thanks to everyone for the feedback.

I think I'll try the powerslots.

I have always had good braking performance with the drilled Zimmermanns (up until they crack) but I'd rather not be replacing rotors so often.

Does anyone recommend the additional cost for the http://www.powerslot.com/pages/power_slot_cryo.html?

Is there really a return on investment for this?

Thanks again for sharing your experiences!

Posted by: Bleyseng Aug 1 2006, 03:27 PM

I used them when I had a 4 bolt setup. In the rain they were awesome!!! Lots of AXing in the rain at Bremerton it seemed.

Now I had the drilled crossed vented disc's and they stop on a dime.