Toms1989

Cheers Flanders! Been a challenging few months!

AP Racing CP9200 calipers which are 38.1 and 41.3mm piston sizes.

Yes it's using standard sized RX8 pads.

flanders

Nice, that front and rear combo gives you pretty much identical brake bias as the stock setup.
Someone should really try to advertise these as a package deal on this forum, should be much more cost effective compared to buying from the US.

har-vey

Interesting use of the RX8 caliper, is this so you can retain the handbrake? Did you also look into using a two piston caliper? I've always been tempted with something like with a 350z rear caliper with an additional handbrake caliper from the likes of Willwood. Be interesting to know the weight of the RX8 calipers.

Have you gone with a completely custom disk spec or is there single piece options available?

Great work by the way. Looks very well engineered.

Toms1989

Thanks Har-vey

Yes the RX8 unit is Nissin based like the S2000. So the handbrake actuating part/arm of the caliper is nigh on identical. Just a case of adapting the fixing of the cable to the caliper itself if that makes sense.

I wanted to keep it relatively like for like in terms of caliper performance, nothing too overpowering as to not naff up the braking bias. Just trying OEM pads for now but may well look into aftermarket pads in the future.

As for the weight of the calipers/carriers, I can find out as I've got a spare caliper.

Disc is very custom and only 2 piece as its quite shallow offset, to clear some suspension components.

Hope this helps!

har-vey

I think if this was compatible with an off the self disk from another car it would become a very affordable kit for people to run with the option to upgrade to a two piece disk.

chrispayze

Exactly what I was thinking! Surely there must be a steel rotor somewhere that works?

Toms1989

Oh I agree 100%.

Took a good while to find a compatible disc with the right dimensions and offsets then to have the centres machined out to take alloy centres.

har-vey

so your running a machined disk to accept an aluminium center? what benefit did you get from doing that? did it change the offset or were you just looking to try save weight? wouldn't it have been easier to source rotors from someone like AP?

Or have i got that completely wrong. Guess the real question is are you able to swap the disks out on this kit for a single piece disk?

Toms1989

Spot on.

AP racing don't offer a disc in these dimensions sadly, I wanted AP discs to match the front uns, luckily mateys gaff can machine them with the same groove pattern

As for the last question, I'd need to take the disc off and take some measurements, sadly not in a position to do so at the moment. Only trouble I can think with going for a single piece setup, unless you're 100% confident/have the machinery with drilling some new wheel stud holes and centre bore. There isn't a great deal of choice with 5x114.3 PCD, 64mm Centre bore size and 20mm in disc thickness.

har-vey

Do 20mm disks fit with the RX8 Calipers? i though the RX8 used 18mm disks?