NB8B Brakes on an NB8A

[Okibi]

Does anyone know if you can fit NB8B brake calipers and discs to an NB8A?

Or do they also have a different \"hub\" to hold the caliper further out to suit the larger disc?

[Mr_Q]

I'm pretty sure they fit. I had NB8B brakes on my NA6 and there were no issues with fitting. I can't imagine the NB8A would have any issues.

[Okibi]

You only swapped across the NB8B brake calipers and discs?

[Boyracer]

Definately fit...you need to make sure you get the brakes hoses,they are different at the caliper end.

Rear backing plates are a problem,can't remove then without pulling hub apart,best just to cut them off.

[Mr_Q]

Calipers, discs, hoses (I didn't realise they were a different fitting, I just grabbed them 'cos they were newer than mine ) and front backing plate/dust shield things (the rears were too hard to get off so we just cut the existing ones).

It's a straight forward swap, no problems at all. Now I get to do it all again when I put them onto my NA8.

[CT]

Although, you might have a rear bias issue so it might be wise to factor in an adjustable prop valve in the engine bay to get it spot on. Very worthwhile addition as the NB8Bs bias is controlled by the ABS/EDB controller.

[irwin83r]

listen to MR CT!

they fit ive done it. and yes you do need a proportioning valve to sort out the rear bias.

also you may need to mod your dust shields.. as the slightly bigger dia rotors will not fit. or you could take them off though i hear this is defective.
not sure if the nb8b dust shield swap over or not... would be worth a try.

see...

http://www.bigllama.com/miata/brake/bigbrake.htm

maybe helpfull

[Woo]

Yes, it works a treat.

Question though, if you do front AND rears, why do you need to fit a proportioning valve.
The ABS on the blue car comes on front and rear at very close to the same point in braking. If anything it's better balanced than before the upgrade.

Are the brake lines the same on a NA as the NB8A ? The lines may need changing if your putting NB8C calipers on as the alignment prong is in a different spot to the NB8A.

Thinking I might put braided lines on rather than new NB8C lines (if I can find some)

Very worthwhile mod

Woo

[Mr_Q]

My NB8B brakes came off a Japanese car without ABS and seemed fine without the proportioning valve. I'm hoping they'll also be fine on my Clubman without the later valve, but would like to hear from anyone who knows for sure.

[bam]

i'd like braided lines too, they legal? where can i get em, how much???

[Okibi]

you can get ADR approved braided lines.

[CT]

Yes, it works a treat.

Question though, if you do front AND rears, why do you need to fit a proportioning valve.
The ABS on the blue car comes on front and rear at very close to the same point in braking. If anything it's better balanced than before the upgrade.

Are the brake lines the same on a NA as the NB8A ? The lines may need changing if your putting NB8C calipers on as the alignment prong is in a different spot to the NB8A.

Thinking I might put braided lines on rather than new NB8C lines (if I can find some)

Very worthwhile mod

Woo

Because, the NB8A(NA8C also) 255mm front/250mm rear is different to the NB8B 270mm front/276mm rear rotor sizes. The NB8B proportioning is controlled by the ABS/EDB module. The NB8A is controlled by the prop valve fitted adjacent to the master cylinder. Unless the 10AE has electronic proportioning via the ABS module like the NB8B+ models, your front to rear bias will be out and need adjusting. Depending on the model, there are also different master cylinder sizes which also has an impact.

When I drove Andrews car, the first thing I noticed was the rears locking before the fronts. It is easy to tell at speed on the track, maybe not so on the road. Jap models are a whole other story - they have variations we didn't see. If you have the manual OEM prop valve, it may be OK, but its more luck than good management. The later model cars got more rear bias - Matty has looked into this in more detail. Don't forget that running different compound pads front ot rear will also affect bias as will larger rear rubber.