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Old 10-08-2017, 12:03   #1
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Join Date: Jul 2006
Location: Surrey
Car: VII FQ-300x2
Posts: 481
MTEC discs for K-Sport/D2 - review

I've had D2 330mm brakes on my 7 for a good few years now using Carbotech XP12 pads and together they perform very well. However as they are used mainly for track days I've had to change discs every year because the D2 discs suffer from bad surface cracking - actually failed an MOT one year.

Thought I'd try MTEC discs this year. They are machined flat compared to the 1mm mounting lip on the D2's so I decided to mount the bell with 1mm washers to put them central again - no ill effects doing this as far as I have seen.

With new pads I bedded them in with a few heat cycles on the road (a few 70 - 20 hard stops type of thing) and let them cool each time. First time on track got them a lot hotter with a few laps and again let them cool.

After this they worked well on track however on the road afterwards they squealed something rotten - even I found it hard to live with !

However after a couple more hard use track days the squeal calmed down and they are now OK on the road (not 100% quiet but OK). I assume this is both pad and disc bedding down.

After similar use (see below) the MTECs are holding up much better than the D2s so overall I'd recommend MTEC as a better alternative to D2/K-Sport and they are a little cheaper too

One other thing to note with D2 is DO NOT under any circumstances use the drilled disc option - my garage fitted these after the MOT fail and after 1 track day they had 2mm deep cracks around lots of the holes, to be fair to supplier they replaced them FOC.

D2 disc:


D2 after 1 track outing

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