I like the path of this thread.

I measure 3mm radial clearance on the K1's between the wheel the radial Dynapro calipers. The forged Dynalites require 4.83 mm more radial clearance to fit however. It definitely won't fit without thick wheel spacers.

With the 20mm spacers it gets more tricky. Its right on the raged edge of getting the caliper inboard of the drop section. It will depend on the rounded profile of the caliper, the Dynalight has a bigger radius rounded profile and the fact the caliper is narrower helps.

Whats even more interesting is I put a GenII 6UL 15X9 and it has almost the same clearance but it drops away sooner as you go inboard on the wheel. It will be tight.

The Mini hats I am using have a .83" offset with a .26" thick face. and result in 3mm clearance between the rotor and the tie rod end so you cant go much further inboard with the rotor. I don’t know what Savington is using for those dimensions. The 11" wilwood Miata kit uses .75" offset with a .32" thick face.

Pics of a K1, a K1 with 20mm spacer, and a Gen1 15X8 6UL

Bob

is that the +38 or +32 K1? 15x7? I'm already pretty close with my +38, 15x7 K1s on the Dynalite/corrado rotor combo.

I second that. Very interesting.

On tie rod end clearance... I have non-stock tie rod ends as part of my DIY bumpsteer kit. If they clear the Corrado rotors, just barely but enough, I wonder if I'll be OK with the .83" offset hats with the .26" thick face. I'm using 15x8 Gen I 6ULs right now.

That could be a problem. I measure the Corrado rotors as having a .4875" offset and a .2" face thickness. The Mini rotors are much closer to the tie rods than Corrados. and there is not allot of spoke clearance to the caliper for less offset on the hat unless you run wheel spacers with the 11.75 rotors.

Bob.

I need to carefully measure out and sketch/model my clearances before I buy anything.

It is stamped +38

Bob

Correct me if I am wrong. So this kit from Summit Racing will fit Miata with 15x8 6UL +36 with very little mod ?

ZXtex & Oscar- I can confirm these clear the old 6uls and the +38 Kosei. It's extremely close, particularly on the 6ul. I had to fiddle a little with spacing on the washers used as shims but it works. Doesn't require any modification of the kit to make these fit, just shimming as Bob's cardomain covers. The Kosei you just have to watch your wheel weight placement. With the older 6uls its the spokes that are close, not the rim.



If you want cheap you have to call places. I believe Wilwood has minimum advertised pricing policies. This is the cheapest place I found when I was shopping for the Mini Dynapro set up. http://autofabcart.net/ Have to call or email them for a price. The Mini kit isn't listed on their site but any Wilwood dealer can get them. When I was shopping around a year ago they quoted me around $850 if memory serves. I remember they were over $100 less than Summit at the time.

Good stuff, thanks! That sounds like simple non-offset wheel shim could add some additional spoke clearance if it is wanted. I just need to verify that the rotor will clear my tie-rod setup, which is non-stock DIY to reduce bumpsteer for a non-stock steering rack location due to the non-stock LS1 V8 :)

Thanks cueball. I can deal with a small spacer if needed. Now to find the funds for this :)

This place has good prices and looks like they can customize some parts in the kit like the rotors. The also make allot of there own custom brake kit components for numerous other cars. Which means they might do some custom work. I wonder if you could get them to provide the centering rings needed to mount it on a Miata as well. Or maybe just put together a kit for a Miata.

http://www.tceperformanceproducts.com/mini/kits-16/

$859 for an 11.75” kit with the cheaper straight vane rotors and Radial Mount Dynapro calipers, much better than Dynalites or other calipers typically used based on my personal experience.

Bob

Hi Bob,

This is great info, thanks. I purchased a DynaPro radial mount two years ago for a mock-up, but unfortunately my attention drifted elsewhere (engine = boom!). Wish I had seen your car domain page back then!

Anyway, I've looked in a bunch of different places and haven't been able to find an 11" rotor that would fit those hats (8 x 7" bolt circle). Do you know of any?

Thanks,

Will

I thought the 11" rotor was the VW unit, which doesn't use the hats. Hats were only for the 11.75" rotor rings.

There are BBKs that use Wilwood hats with 11" rotors, like the 949 kit.

No the 11" kits use a smaller bolt circle and less bolts for mounting the rotor to the hat. You could buy the hats they sell with the Miata kit for 11" rotors separately though. I’m not sure what off the shelf hat offsets are available and if they would work though.

It is interesting that wilwood didn’t make hats hub centric for their own Miata kit they use centering rings just like I use to fit the Mini or Honda hats.

Mostly I think going this route is for the serious high hp track cars. There is a major advantage in pad life by going with the Radial Mount Dynapro setup over any of the other calipers. And if that is what you are concerned with you probably want 11.75” rotors anyway.

Bob

Great Info Bob! If they made a kit with the right lines and centering rings, I would jump on it. Seems like we have enough interest here that we should ask them if it is something that they would be interested in.

Thanks again for the info Bob.

My goal is to have these fit with Enkie RP-F1 wheels. I have about 4 sets of them! None of the current big brake kits work with the RP-F1s, which is why I started digging around a couple of years ago. I'm still using stock calipers and have had about enough of 'em. I do not need the thermal mass of 11.75" rotors, but I do want all of the other improvements over the stock calipers, and to have it fit under my 8.8-pound wheels.

I'm familiar with the 6x6.25" hats and know there are plenty of 10.75-11.75 rotors that fit them. Problem is that the closest back-spacing is 0.75", whereas the Mini kits hats are 0.83" backspace. From reading your post, it seems that the 0.75" backspace would require a 3.5mm shim between the caliper bracket and the mounting bosses on the spindle (where you are using a 1.5mm spacer).

As it turns out, a good friend of mine was the original designer of the BBKs sold by the better-known Miata vendors that are selling them now. Custom rotor hats, Wilwood calipers and rotors. His kit was designed to retain the stock rotor offset (~0.81") and the center bore is correct for the Miata, so no centering rings are required (rotor hats are hub-centric). I'm going to re-measure the offset of those hats - he has a few sets and hopefully I'll get a pair. :)

Cheers,

Will

I just called Autofabcart to see how they compare with TCE. They quoted me $883 for the standard 140-8740 kit which includes the GT directional vein rotors. TCE is $959 for the same. Wilwood has minimum advertised pricing policies and $959 is the minimum for that kit, that's why Summit has the same price. Autofab doesn't post pricing, you have to call but it saves you $75 to make the call.

It's nice that TCE can customize it but if you don't care about that give Autofab a call.