Cost-effective rear brake upgrade
 

Does such a thing exist?

NBFL track car with 4 pot fronts with race pads and the biggest NB rear brakes (for which there doesn't appear to be a decent pad available) and ABS. It needs to keep the ABS as I have a different driver brand new to track days at each event, and I need those drivers to be able to do an emergency stop at some corners to avoid hitting the expensive cars that have overtaken us on the straight and then brake checked us in the corner. It needs to do that even though I use slippy 195 street tyres to help the newbies experience rotation.

It now needs more rear brake effort without disabling ABS and without adding a prop valve.

Is there anything known that will allow a bigger rear rotor and/or a bigger better pad without spending big money?

TIA

PS I'm hoping the odd bit sticking out under the car is the unused part of the seat harness.


https://cimg3.ibsrv.net/gimg/www.mia...85368d782b.jpg

Wait, you're complaining about no pads available for the NB2?

https://949racing.com/product/g-loc-...-sport-brakes/
https://www.hawkperformance.com/part...h_type=vehicle

How many different options do you need?

No. Thanks for the heads-up.

If you have a pad you want to run that's available in the regular 1.8 brake flavor, and you don't want to go with any of the pads engineered2win posted, you can do some parts swapping to make it work.

Sport calipers will fit the smaller brake brackets that came on NA8s and early NBs. If you run those brake brackets with adapter brackets like the link below, you'll get a 1.8 pad shape on a Sport rotor, with a the larger piston Sport caliper and no change in mechanical brake bias.

REAR Sport Size Rotor Upgrade Brackets for Miata 1990-2002 (good-win-racing.com)

[NA] NB sport REAR calipers on NA 1.8 rotors? - MX-5 Miata Forum

What pads are you currently running? It sounds like a pad with a higher friction coefficient could meet your needs?

Every g-loc pad is available for sport rear rotors...

And why not use a prop valve? It will help balance out your brakes and doesn't affect abs that I'm aware of...

You could also coach your driver's through proper braking technique instead of trying to rely on a hardware solution that's not ideal.

Hi, check out these adapters: https://www.good-win-racing.com/Mazd...ml?id=C69hyWe9 which allow you to run a sport rotor, with the pre-2003 smaller rear calipers and brake pads. You get less rear brake bias which is important in this platform, but larger rotors from the sports for more thermal mass. Going something like a R10 front / R8 rear, or R12 front / R10 rear pad compounds which is what I did. Plus aftermarket solutions typically have POO parking brakes, at least from what I've seen.

I ran the small NA6 rear calipers on big Wilwood disks on the back of my racecar using R12/10 pads, worked a treat. That was a build from scratch exercise, otherwise my starting point is pad choice to minimise mechanical (expensive) solutions. Lots of pads out there Dave!