Thread: The Ultimate 6 Speed Swap Thread...Parts/Instructions/Results!!

Are any of them a B13/NX?

Well being this is the very first actual mount kit for the car, I think the issue isnt that big of a deal and isnt causing any major issues. Ive put the kit to some abuse... 1.58 60 ft on the track, several low 1.6's and quite a bit of torturous street abuse. Yes it pushes the mount into the bracket but im not seeing any major movement in the motor. Solid T bar dogbone mount in front, prothanes all around in the others.

Like I said what I did was leave the front Metal Spacer out and just put the back one in to fill the gap due to the off center of the mount. So far its pushed in but hasnt moved any more than that. It really doesnt bother me.

1 b13

It has the trans to far forward, and down. Also has the engine twisted backwards. Since I fixed these issues with the mount that I made the insert isn't pulling out, and the car rides better. I've also been getting about 30mpg @ 77-82mph lately.

My spec motor mount sits a little too high (due to how I had to get it welded), but definitely not as forward. Either way I am more then happy to have traction in first gear for once, even with mild 200whp on a p11.

30mpg at those speeds is impressive. I got sub 30 going 75mph (2950rpm) and 32ish going 70mph (2750rpm), that's with an 02 spec gear set. As it stands right now it's 1mpg down from what I got with my p11 stock trans 33mpg going 70mph (3150rpm).

Back when I had the b13 trans in I was getting about 28mpg at that speed range. I'm using an 04 specv trans now. Honestly the rpm doesn't seem to really be lower than the 5 speed. It's supposed to be, but it seems really close to the same. This is with 205/40/17 tires too. If I still had my 16s the revs would really be up there. I'm happy with it overall though. Much better traction than any other B13/14/15 trans by far. Hell, I would've gotten stuck after the last bad rain storm, but that awesome HLSD pulled me right out of the mud.

have you verified with a GPS if the speedo is showing the correct speed?

I'm using the specv speed sensor with almost the same size tires as the specv came with. The GPS said I'm 3mph fast, and the miata.net tire size calculator says I'm 2.8mph fast. So, I'm not really far off the mark there.

Willing to make another set since mazworx has theirs on hold? Pm me a price.

Mine is as good as it gets, within 1mph off. P11 rims 205/60/15 tires I guess are similar enough to Spec V's. If my speedo was too far off I would have tried using the P11's speed sensor wheel.