Vehicle & Technical > Discovery
Rear Brake Discs: What are the pros & cons of solid, slotted, drilled & vented
stageonesimmo:
Got to agree with both sentiments here actually - as long as you do the same the both sides, all will be well. Also, dont underestimate the drop in performance over time of the standard set-up - just the other week the brakes on the wife's MR2 were dire - all it took to make it stand on its head was a strip of the caliper sliding pins, a re-grease, a de-glaze of the pads and it was good to go - no fancy grooved stuff or anything like that, just got the orignal stuff working how it should and it was like a new car!
Same was true of the disco - the rear calipers were shot so I put some new ones on with new pads and discs and it was transformed, again, just sticking to the stock set-up saved a fortune but got (to me) just as good a result.........
I think the cracking issues with drilled discs is limited to race set-ups really or you may get it if you tow heavy loads regularily. You may also get it with cheaper discs that may not have been stress-relieved after drilling. If its a worry try 'dimpled' discs as opposed to drilled as this will cut out the cracking issue. But with all of these drilled/dimpled/grooved options, there has to be a trade-off for the extra stopping power which will be increased wear rates so figure on changing the pads more often - to my mind, a well looked after properly functioning stock set-up will be easier to keep running well and cheaper as you wont shell out for new pads as often..........
Range Rover Blues:
Grooved disks are supposed to stop the pads galzing up, as Simo says at the cost of pad life. I havn't had mine on long enough to comment but 100% I have to agree that starting with everything working and in good condition is the way to go.
auf_wiedersehen_pet:
--- Quote from: Disco-Ron on December 22, 2008, 22:15:57 ---Mmm, do they 'do' vented discs for the rears....????
--- End quote ---
--- Quote from: Range Rover Blues on December 23, 2008, 01:07:46 ---I've never seen vented disks on the back of anything.
--- End quote ---
There's lots out there.
Disco-Ron:
--- Quote from: auf_wiedersehen_pet on December 23, 2008, 21:41:47 ---
--- Quote from: Disco-Ron on December 22, 2008, 22:15:57 ---Mmm, do they 'do' vented discs for the rears....????
--- End quote ---
--- Quote from: Range Rover Blues on December 23, 2008, 01:07:46 ---I've never seen vented disks on the back of anything.
--- End quote ---
There's lots out there.
--- End quote ---
Well, i for one meant on the back of a land rover,...... as i suspect RRB did....... :roll:
Range Rover Blues:
Definitely not on a LR, but I've never seen vented disks on the back of Cosworths, Astons or any other car I've worked on (true they would have had to be Fords, LR or part of Ford's PAG).
Given that 70% of a car's braking happens at the front, just how overkill would it be to have vented rear disks?
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