Why can this one use the stock subframe while the other cannot? Different oil pump design?

 

The other one has to package a header, this one is just a single exhaust pipe since the exhaust converges in the head.

 

Good question, but no. We partnered with Quarter Master to design this and they supply the piston, bearing, and seals, and we make the inside of our housings identical to their 740 series unit. So mechanically it's identical to their existing release bearing that's been in production for years, but now it fits the Miata bellhousing.

 

Hydraulic release bearings are nothing new, the stock 370z one is just pretty craptastic is all when you put a stronger pressure plate in. Since they partnered with Quartermaster, who have tons of experience in race environments, I don't have any concerns as to whether it will hold up or not.

 

My only question or critique would be why does the throwout bearing lines need to have a new hole drilled into the transmission, why couldn't it use the shift fork opening?

 

You want the air bubbles to raise as easily as possible when bleeding, so you don't want to loop them downward, then up if you can help it.

 

That and the new header tube right in the same area. Sorry for double post!

 

Shift fork opening is on the far side of the bellhousing in relation to the master cylinder, and the exhaust is right there too. If you routed it through the fork opening you'd have the line laying right on your exhaust. We just blocked off the shift fork opening completely with a piece of scrap aluminum. Drilling two 1/2" holes in the bellhousing just takes a minute and makes everything much cleaner and safer.

If you installed this in a BP powered Miata, then the shift fork opening is wide open.

 

Fair enough, that seems reasonable and something I had not considered. This swap sure looks cool and is making me second guess if I want to go forward with my turbo project.

Also, thanks again for lending us some sockets and a jack at MATG. That was much appreciated and helped us swap my buddy's differential that broke.

 

Any plans for any NC swaps in the future?

 

Speaking of, how does this pair with the OEM Mazda MC? I would be all over a slave that's not a consumable, purely for the hassle of it.

 

This is a really interesting kit, although I'm not a huge fan of the internal slave cylinder. I assume one of those fittings is for a remote bleeder?

 

Bingo! Remote bleed line.

 

Will this be able to use your a/c kit?

 

The 2.5 swap is already filling that void pretty damn well.

 

Damn it, I already ordered a VVT Bp engine with plans to turbo. the K swap seemed way over budget but this actually brings it down to comparable prices, now I have to figure out what I want to do all over again.

 

For those looking to turbo one of these here is a link to a manifold that could work

https://prlmotorsports.com/9thgent3t...x#.V0npbb6M-Uk

 

I assume Z3 engine placement within the stock subframe ends up close/identical to the A2/V8R subframe setup? IE; I should expect to buy one of your valve covers to tuck a Z3 under the hood of an NA?

Any idea when it will hit the site with pricing? Are these only available as complete kits for the time being?

Also, I'd suggest promoting the fact that the hydraulic throwout bearing was developed with QuarterMaster; myself and a few others I've discussed this with all paused at the thought of a one-off hydraulic TB made in-house by a swap company (no offense) but adding a more reputable clutch company to that would go a long way to assuage fears I think...

 

K Miata seems like much more than a typical swap company to me. I think this new kit is very cool, makes me want another Miata. Besides, it makes a boosted K24Z3, ZF, Getrag combo pretty reasonable. He said they are currently working on their own turbo manifold.

 

Saw this on FB and came here to see the opinions of people with knowledge. I'm still on the hunt for a permanent miata they'll stay original and another to build. This will definitely be something to consider when it comes time to build.