You want the wilwood calipers. I'll speak from experience after this weekend. I can already tell they are significantly better from street driving.

what would you guys recommend for 80% street/ 20% autox. Carbotech AX6? XP8? Hawk HP+? Porterfield R4S?

I plan to track my car and I have the stock sport brakes with XP8s all around and SS lines.

can you comment on the "streetability" of the xp8s? Cold performance? autox performance? fade?

They loud and they dust a lot. Beside that they are fine. They bite much better when they are warm but cold they are just as good as a normal everyday brake pad.

Good enough for me, thanks.

I want that TSE BBK so bad, but I want Megasquirt much more. :crx:

Maybe later on in the season... I'll probably just toast these Hawk pads in anticipation of the BBK rather than going for Carbotechs like I was planning on. :jerkit:

i will sell you my old MS2 project that i did not finish (fail :facepalm:) for cheap.

Hey guys,

I'm sorry to drag this thread from the grave, but I think I have a valid reason.
The posts of Sandro in this thread have inspired me to do a similar big brake upgrade.
I wanted to PM him, but I need to have at least 15 posts, but I do not want to spam up the forums.
I realise I havn't made an introductory thread, but I will do this if required.
Instead of sending a PM I'm posting in here.

I hope Sandro is willing to share some of his knowledge with me.
The problem I'm running into has to do with designing the caliper brackets.
How did you work around the Boxster caliper bolts interfering with the Miata bracket bolts?
The only option I see is using shorter bolts to mount the calipers, but I'm not sure if this will be safe with so little threads engaged.

Input from other members is also highly appreciated ofcourse :P.

Greetings,

Opgedronken

Well, you're humble, using good grammar, and have a valid, well thought out question. So by all means, drag the thread out from the grave.

Are you in Germany? I would imagine it's slightly easier/cheaper to get Porsche stuff over there (where the Porsche BBK guy is from) but if you're in the states, it's MUCH easier to go with a wilwood setup.

$250 in calipers, $60 in rotors, $80 in brake lines, and $100-$200 in brackets, and you've got a great BBK with $30 replacement rotors and $60 buys you almost any pad compound you want, from street to race.

Haha thanks, first impressions last right ;).

I'm in Holland and parts are pretty decently priced, but Ive already got everything together!
I just need to fab up the mounts, and I could have done that already if I wasn't worried about safety.
Thanks for thinking with me though!
I was hesitant to pull the trigger on a Wilwood kit, but now I've found these. The Wilwoods look a bit too much like kissy lips to me :P.

Here's a pic of the first caliper mocked up.

https://www.miataturbo.net/attachmen...ine=1323449415

I saw a mention of Axxis ULT pads somewhere on MT recently, but for the life of me I can't remember where. I think the jist was that they're good road pads but come up short on the track. Can anyone elaborate on this? I'm interested because they're a very popular pad on this side of the pond :)

Hmm either this thread is in the wrong section to gain a lot of attention, or I'm asking something too complex :P.
Anyway, I've decided I will just go ahead and machine the brackets out of steel. Taking into consideration there will be a shear force on the bolts instead of a tensile force, I suppose I don't need a ton of thread engagement on the bolts.
If the brackets really come out looking very flimsy I still decide to toss them out and come up with something better.

Opgedronken, If you will post pics of your problem I'm sure it can be solved here on this forum. Post some pics bud.

Owen, you need to match your pad to the tires. So if your on a 400 treadware tire the Axis Ultimates will be plenty. If your on RS3, NT01, RA1, BFG R1, etc you need to run a race pad like carbotech xp10, Cobalt XR3, Hawk DTC 60, etc.

I kinda figured I overdescribed it, I'll take some pics tomorrow when I mock it up again.
It really boils down to one thing. I'm worried the bolts that hold the caliper down to the bracket will not have enough threads engaged to safely hold it on.

Yes, I understand that but I'm not understanding why you dont have enogh engagment. Post pics.

It's because I can't make the bracket any thicker where the bolts screw in because it would put the caliper to far outwards.
I'll try to take a pic, but I'm not sure how it will help more.

Looking at pics of similar caliper brackets I think I might be a bit too worried about it, because they aren't really thát thick either.

Time to ugrade those springs and make a coilover.

Yes maybe somewhere in the future, but I'm low enough as it is so I'll only get new coilovers when everything else is done.

Looks like used Porsche Boxster Calipers go for $100 or so a piece, less than used Wilwood calipers.
Boxster rotor sizes are 298mm front and 292mm rear, Miata Sport Rotors are 270mm front, might be close enough to make it work. Renault Clio rotors look like a ideal fit (bolt pattern, center bore and 280mm size) but they are not available in the US and shipping on rotors is quite expensive.
The question is if the thickness of the Porsche/Brembo calipers require spaces ro make 6ULs (15x8) work.