Brake disc life

kenny · Post by **kenny** » Fri Jun 15, 2007 4:32 pm

ironside wrote: have used plain discs with RS42s and found the braking performance is exactly the same.
The ally belled drilled/grooved ones look a whole lot cooler imho. I'm not convinced the weight saving is that much or really worth the price tag. Nothing wrong with buying them because they're cool though! I did

I was advised to get them to help with heat dissapation but was told to expect no increased performance, I think the perceived improvement is more down to confidence to brake late without fade.

Post by **Shug** » Tue Jun 19, 2007 5:09 pm

Increased heat dissipation, straight into the wheel bearings

No, it will be a factor. What I said about braided hoses is that any feel differential will be masked by the servo. They also need to have an eye kept on them in case they fray (as they can do if installed badly) They will have higher heat tolerance and burst pressure than the standard rubber hose though.

tut · Post by **tut** » Tue Jun 19, 2007 5:15 pm

REAL disks, on REAL Elises were claimed by Lotus to have a 100,000 mile life span, with the pads lasting 50,000 miles.

My first set of pads lasted for 28,000, and that was including trackdays and a 180hp K engine.

Still have the MMC's on the back, but a bit too much power to risk them on the front.

tut

GregR · Post by **GregR** » Tue Jun 19, 2007 5:16 pm

tenkfeet wrote:From the service manual :

New 26mm
Service minimum 24.9mm

Similar tolerances to the S1 discs. Mine were down at 24.1 when I changed them at 43k miles

MacK · Post by **MacK** » Tue Jun 19, 2007 5:29 pm

tenkfeet wrote:From the service manual :

New 26mm
Service minimum 24.9mm

I was told on SELOC, that the service manual is wrong, and that "Min 24.00mm" is stamped on the disk, meaning you have 2mm of allowable wear.

I never saw the stamp on mine when I changed them, but they had a decent sized lip, so enough indication of wear.

Post by **simon** » Tue Jun 19, 2007 9:09 pm

Hmm, interesting as mine are currently at 24.92 so if the service manual is right then they're due for a change soon. If it's wrong then I've got loads of time

MacK · Post by **MacK** » Wed Jun 20, 2007 8:56 am

I'd consult Lotus/MMC to confirm.

Post by **simon** » Thu Jun 21, 2007 7:51 pm

Looks like the service manual is wrong. I checked the discs tonight when I was changing the wheels over and stamped on the disc is "MIN TH. 24.0mm"

tenkfeet · Post by **tenkfeet** » Fri Jun 22, 2007 3:03 am

simon wrote:Looks like the service manual is wrong. I checked the discs tonight when I was changing the wheels over and stamped on the disc is "MIN TH. 24.0mm"