MX5 brake sizes
Author
Discussion

SimonV8ster

Original Poster:

12,918 posts

251 months

Saturday 5th February 2011
quotequote all
Cam aybody enlighten me as to front brake disc sizes and there interchangability (real word ?!) on Mk1 MX5s.

Bascially I've picked up a MX5 which has a BBR turbo set up on it. I want to prepare it for track use and need to rebuild the front end as brakes are knackered.

What size discs can go on there - do later calipers from other models fit with bigger discs ?

Don't want to go silly but just a cost effective way of an upgrade.


piefacemate

592 posts

194 months

Saturday 5th February 2011
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Dont quote me on this, but I believe the larger discs used on the Wilwood 4 pot conversions are Corrado G60 disks, perhaps the calipers can also be retro fitted?

MX-5 Lazza

7,954 posts

242 months

Saturday 5th February 2011
quotequote all
Mk1 1.6 has the smallest discs.
Mk1 1.8 and Mk2/2.5 1.6 & 1.8 have bigger discs & callipers.
Mk2.5 1.8 Sport has the biggest discs & callipers.

1.8 discs can be fitted to 1.6 by using the 1.8 carriers and retaining the 1.6 callipers. You will of course need 1.8 pads.

Mk2.5 1.8 Sport discs can be fitted to all but would need the carriers & callipers.

However, I wouldn't bother. Just upgrade the pads to Axxis Ultimates or Mintex 1144 and they will do you just fine on the track (and will be lighter wink).

SimonV8ster

Original Poster:

12,918 posts

251 months

Sunday 6th February 2011
quotequote all
Thanks Lazza - saw your car at Brands last monday thumbup

That bloody Paul Roddison has got me into MX5s !!

So you think that leaving even the smallest brakes will be OK ? I suppose it will save me some cash !

roddo

584 posts

218 months

Sunday 6th February 2011
quotequote all
Another lamb to the slaughter...........

Well done and you will enjoy it!!!!!!

MX-5 Lazza

7,954 posts

242 months

Sunday 6th February 2011
quotequote all
Stick with whatever it comes with, change the fluid and upgrade the pads and fit braided lines. You'll probably find that fine as the earliest cars with the smallest discs are also the lightest cars.

piefacemate

592 posts

194 months

Sunday 6th February 2011
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What uprated pads are available for the rear, not seen many options?

MX-5 Lazza

7,954 posts

242 months

Sunday 6th February 2011
quotequote all
Axis Ultimate wink

Mr MXT

7,774 posts

306 months

Sunday 6th February 2011
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MX-5 Lazza said:
Axis Ultimate wink
Now called StopTech fyi!

Laz do you have them allround. I'm running them front and yellowstuff rear. Do you think havign them all round would make a big difference?

MX-5 Lazza

7,954 posts

242 months

Sunday 6th February 2011
quotequote all
According to their website they are called Axxis ULT!

I currently have Yellowstuff all round but I will be going back to Axxis whatever when I've worn them out (or when they fall apart rolleyes). I'm not too impressed with Yellowstuff and the rears in particular seem a bit off. My handbrake is only just good enough to hold the car now!
I'd recommend genuine Mazda rear pads as the rears don't do as much braking, get as hot or are as likely to fade and the Mazda pads dust less and are cheaper and work very well.

piefacemate

592 posts

194 months

Sunday 6th February 2011
quotequote all
MX-5 Lazza said:
According to their website they are called Axxis ULT!

I currently have Yellowstuff all round but I will be going back to Axxis whatever when I've worn them out (or when they fall apart rolleyes). I'm not too impressed with Yellowstuff and the rears in particular seem a bit off. My handbrake is only just good enough to hold the car now!
I'd recommend genuine Mazda rear pads as the rears don't do as much braking, get as hot or are as likely to fade and the Mazda pads dust less and are cheaper and work very well.
My last proper run out would suggest otherwise as the OEM pads on the rear were on fire!

Edited by piefacemate on Monday 7th February 09:16

GravelBen

16,350 posts

253 months

Monday 7th February 2011
quotequote all
piefacemate said:
My last proper run out would suggest otherwise as the OEM pads on the rear were on fire!
The only time mine ever got that hot was when the caliper seized, even then they were smoking but not on fire.

They took plenty of hard track abuse (standard power and normal road tyres though) without ever overheating or fading - AFAIK they were OEM Mazda pads all round, I never had to change them but previous owner of that car had everything done at a main Mazda dealer.

piefacemate

592 posts

194 months

Wednesday 9th February 2011
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Fire might be a slight exaggeration on my part smile

I'd changed the pads a week earlier and fixed one sliding caliper that'd jammed through a corroded pin, so don't think it was anything other than excess use on poor pads.