Rear discs and pads - track


Scottek

Scottek

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Joined
Sep 28, 2010
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Got my first trackday soon so thought I'd get all my brakes sorted. Front are mtec grooved discs and ds2500 pads which are fine. Rears are oem and could do with replacing.

Is it worth getting something different on the rear or should I just get another set of oem discs and pads?

Cheers
 
Turbo charged?
I'd get something alittle stronger if your running big power. Mtec discs will be fine with another set of ds2500 for the rear.
 
Depends how late and heavy you want to be on the brakes.

I'd also say upgrade rear pads and see how you get on.
 
If you leave stock rear brakes and upgrade the fronts, you'll could end up hammering the rears way past their fade point, which means the bias will end up going fully forwards over a few laps, as well as losing up to 20% of you braking potential.

Upgraded rear pads will maintain the bias and the braking power for as long as the fronts hold out.

It's not essential by any means, but it is one of those many subtle intangibles that set a good brake system apart from a bad one.
 
^^^right on buddy!

Ive used OEM on the rears, not fun when paired with upgraded fronts.
If you follow what Kozy is writing; it translates to a *twitchy* rear end under hard braking when the fronts are not paired correctly to the rears...makes for slower lap times.
 
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yep! Twitchy rear end is a sign of too much front bias, much against most people's intuition.

The reduced rear brake force is doing two things, allowing the rear suspension to droop, which decambers the rear tyres and pulling the RTAs backwards to a lesser degree, which affects the in-built passive rear steer effect.

Result is less camber and toe out, i.e a twitchy arse under braking. People wrongly assume this feeling is the rear tyres locking up and so it rarely gets properly recitified with more rear bias.
 
Cheers for the advice guys, ill go with the same setup as the front then.
 
Anyone know where I can get mtec rear discs. I bought the fronts from freakyparts but can't see any discs on their website anywhere!

Suppose I don't really need mtec but I would like them if they are out there. Can only find 4 stud ones on the mtec site.
 
Scottek said:
Anyone know where I can get mtec rear discs. I bought the fronts from freakyparts but can't see any discs on their website anywhere!

Suppose I don't really need mtec but I would like them if they are out there. Can only find 4 stud ones on the mtec site.
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Whats wrong with OEM disks? All you need are better pads for the rears.
 
I've sorted out my inbox now, I can supply them, drop me a PM and we'll sort something out.
 
tama666 said:
Whats wrong with OEM disks? All you need are better pads for the rears.
Click to expand...

Ah right, I thought you meant the discs too.

Does it matter having the mtec discs? As Ive had no problems with them. It will just look better hah.
 
OE discs are perfectly up to the job, no point spending extra on aftermarket ones (if they are more anyway).
 
I think a set of Mtec discs (from me obviously!) are cheaper than OEM.
I've been running Mtec discs on my race car last season and this. Still on the first set of discs and plenty of life left in them too!
 
Well can't argue if they're cheaper! Unlikely to be warping them or anything.
 
As I said I've been running them on the race car. Two weekends ago we did a 360MRC event at Donnington Park. 1x20 minute qualifying, 2x20 minute races then a 6 hour endurance in the afternoon (running as a team of 4 in a relay). Yes the DS2500s are finished now, but the discs are still fine :) I fitted the discs and pads April 2012 so completed 2 seasons racing (bar 1 round) as well as test/trackdays in between.
 
I would replace the disks only if you need to. If there is no reason save your monies for gas, plugs and oil, your going to need that more than rear disks.

Ive been running oem rear disks for years. Ive also used brembo cross drilled in the rears, no difference to me. :)
 
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