Finally, new lightweight rotors for the EVO8-9!
Aug 28, 2009, 04:50 PM
#16
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Are you using the OEM Brembo calipers David or aftermarket? I know there are some aftermarket calipers out there (primarily Wilwood) which offer good weights savings. Not unsprung weight savings, but weight savings on all for corners nevertheless.
Aug 28, 2009, 07:38 PM
#17
Can you post pic's?
Do the RR's use an Al hat on a parking brake assy????
My buddy designed the PFC disks, they have a newer updated design, wonder if it will be released for the EVO aftermarket, uses significantly less hardware
Also, can you measure the thickness of the friction plates on the disk (I don't mean the overall thickness), inboard and outboard, I'm just curious on any geometry difference between the new disks compaired to PFC or other's that you guys carry.
Thanks,
Do the RR's use an Al hat on a parking brake assy????
My buddy designed the PFC disks, they have a newer updated design, wonder if it will be released for the EVO aftermarket, uses significantly less hardware
Also, can you measure the thickness of the friction plates on the disk (I don't mean the overall thickness), inboard and outboard, I'm just curious on any geometry difference between the new disks compaired to PFC or other's that you guys carry.
Thanks,
Aug 28, 2009, 11:18 PM
#18
Yes, using OEM Brembo's, I do not want to change the stock brake or size. Going with a lightweight drag brake is not at all interesting to me, trying to keep the car a real EVO.
Yes, the rear rotors us an aluminum hat on the parking brake assembly. No I can't post pics, they are on the car. I am not going to measure the thickness either, I feel that is probably information Giro doesn't want out there.
If you do a search for 'evolutionary' or find his post in this thread on page 1, he has done more testing and has posted pics and videos.
Yes, the rear rotors us an aluminum hat on the parking brake assembly. No I can't post pics, they are on the car. I am not going to measure the thickness either, I feel that is probably information Giro doesn't want out there.
If you do a search for 'evolutionary' or find his post in this thread on page 1, he has done more testing and has posted pics and videos.
Aug 29, 2009, 08:48 AM
#19
Yes, using OEM Brembo's, I do not want to change the stock brake or size. Going with a lightweight drag brake is not at all interesting to me, trying to keep the car a real EVO.
Yes, the rear rotors us an aluminum hat on the parking brake assembly. No I can't post pics, they are on the car. I am not going to measure the thickness either, I feel that is probably information Giro doesn't want out there.
If you do a search for 'evolutionary' or find his post in this thread on page 1, he has done more testing and has posted pics and videos.
Yes, the rear rotors us an aluminum hat on the parking brake assembly. No I can't post pics, they are on the car. I am not going to measure the thickness either, I feel that is probably information Giro doesn't want out there.
If you do a search for 'evolutionary' or find his post in this thread on page 1, he has done more testing and has posted pics and videos.
I am also assuming that you guys haven't sold any of these yet to the public?
After the disks are released there is no secrets about measurements.
Aug 29, 2009, 06:25 PM
#20
None have been sold to the public through us. You are correct, buy a set and have a good time taking all the measurements you want.
Yes, these are geared towards drag racing, autocross and street use, not for road racing.
Aluminum hat for the parking brake is an absolute NON issue.
Yes, these are geared towards drag racing, autocross and street use, not for road racing.
Aluminum hat for the parking brake is an absolute NON issue.
Aug 30, 2009, 10:34 AM
#21
Is there some data supporting this?
In my experience with parking brake testing, Al hat vs iron. The same assy can never achieve the same brake torque after burnishing on an Al hat vs Iron (dyno data). The friction usually gnarls on Al friction surface, and actual on vehicle test the car rolls down the 20% grade.
Of course, swap it on an Al hat the brake will still work, but I'm curious if it will hold on a 20% grade to pass FMVSS135 regulation. Tests like this which products can't pass regulation is the exact reason why PFC does not have a two piece Al RR street disk for the Evo, because of weight difference/demand for a two piece iron/iron was never made where for BMW's they are.
In my experience with parking brake testing, Al hat vs iron. The same assy can never achieve the same brake torque after burnishing on an Al hat vs Iron (dyno data). The friction usually gnarls on Al friction surface, and actual on vehicle test the car rolls down the 20% grade.
Of course, swap it on an Al hat the brake will still work, but I'm curious if it will hold on a 20% grade to pass FMVSS135 regulation. Tests like this which products can't pass regulation is the exact reason why PFC does not have a two piece Al RR street disk for the Evo, because of weight difference/demand for a two piece iron/iron was never made where for BMW's they are.
Aug 31, 2009, 09:48 PM
#22
Tires, wheels, hubs, spindles, uprights, control arms - basically anything that moves up and down . . . . all are unsprung weight.
And the aluminum hats in the rear will NOT cause any issues unless you are maybe playing Ken Block Gymkhana Super Rally Driver and e-braking all over the place to get the wicked cool drifts for +100 style points. . .
If you use it when you are parked to hold the car in place - there should be no dramatic burnishing effect. . .
EVOlutionary
Last edited by EVOlutionary; Aug 31, 2009 at 10:12 PM.
Aug 31, 2009, 10:08 PM
#23
Not much to update. The full set of lightweight rotors are on my RS. A few street miles and about 10 stops from about 160 mph at the drag strip. No warpage, no pulsing. They seem to work great.
Evolutionary has quite a few autocrosses on his, maybe he'll chime in with what he thinks.
Evolutionary has quite a few autocrosses on his, maybe he'll chime in with what he thinks.
If you are interested in these I would call Buschur and get on the list for the first batch!!
EVOlutionary
Sep 1, 2009, 07:45 AM
#24
Thanks Evolutionary.
I spoke with Martin at Giro Disc yesterday. We will be doing a group buy on these in the very near future, working out some details right now.
Martin said he is suggesting these as drag/autocross rotors and NOT for street or road course use.
I spoke with Martin at Giro Disc yesterday. We will be doing a group buy on these in the very near future, working out some details right now.
Martin said he is suggesting these as drag/autocross rotors and NOT for street or road course use.
