T50 to AZ6..... At the CNC....

[oldeskewltoy]

So you're saying everyone who has attempted the swap didn't consider making the clutch work, and bolting an adaptor on the front is no good so you're cutting it up and bolting an adaptor behind the toyota housing....No offence but it comes off a bit arrogant.

Don't T50s have input shaft issues? So you're going to a 2 piece input shaft? righto....

I wasn't trying to condemn so much as trying to explain my motivation. Using a 4AG bellhousing with the T50 splined end of the input shaft means the OEM Toyota engineering is used for the entire clutch. I can't think of better engineering. By doing it this way it also provides less extra modifications for the purchaser - no special disc... or throwout arm, and no untested combining of some Mazda engineering mixed with Toyota engineering. There is an additional advantage... the center case section is all Aisin Industries AZ6... that means this adapter isn't just made for an MX5 AZ6... but it should fit all AZ6 center sections... making it usable to as wide an audience as possible.

The input shaft bearing will be the Miata(MX5) the other end will be the T50 input shaft splined end. The input shaft will also be riding in the input shaft bearing located in the tail of the crankshaft providing bearings at both ends

[oldeskewltoy]

Please excuse the cropped edge... there is quite a bit of $$ in this and we don't want to give away the plans!





for more info on how to get this....
http://www.hachiroku.net/forums/showthread.php?t=5844

[oldeskewltoy]

Adding new photos....

at the machinist...

[oldeskewltoy]

This project didn't die.... it just was on a looooooong detour!

[oldcorollas]

holy schizzle!!! you remade the front of the box? thats a pretty chunk of alloy there

what did you end up doing with the input shaft?

[oldeskewltoy]

holy schizzle!!! you remade the front of the box? thats a pretty chunk of alloy there

what did you end up doing with the input shaft?

Yeah... that was the plan all along... to make a front so the T50 to A block bell housing could be used, along with the entire Toyota "A" clutch and mechanics, and hydralics

HOPEFULLY.... that (input shaft) will be the "easy" part... At this time a zero tolerence slip unit is planned - machined on the outside for a Toyota spline, and on the inside to accept the MX5 input shaft. Zero tolerence and the pilot bearing should be enough to keep it in place.

[dfunkt]

I is in awe. speak fails. awesome you!

[Chrisso]

The exchange rate is right so keep the updates coming.

[LeeRoy]

Why not just use a stronger mazda clutch friction plate? and mate this with a 4a pressure plate?

And if the length is an issue then maybe recess that front gearbox half to position the t50 bell furthur back and bring the input shaft further forward. If you can get it within 5mm or so of where it should be then just run a larger spigot bearing.

I have no doubt in your ability to make this work but the joining of two input shafts no matter how you do it worries me and will undoubtedly worry the market you are trying to sell these to.

[Grega]

holy snapping duckshit batman
thats a fair whack of work there.

OK i know the T50 isn't up to the task (well it is with careful driving) but, if bellhousings are available (niteparts, dellow) to mate the 4A to a w5x series box, does the cost outweigh the benefit

(not wanting to sound like a doomsday daemon just want to understand why) - but love the work

[Grega]

Why.... bet that is running through some brains.... simple really... T50 sucks. W box is fine... but could used better ratios... AND one more gear(for use with a 4AGE). In essence(for 4AGE use) look at the AZ6 as a 6 speed W box.....

But why?.... well in my case, the one part of the puzzle that isn't there... is the addition of a 4.10 Richmond Racing rear diff. The slightly taller 1st gear of the AZ6, matched to the 4.10 offers me nearly identical starts.... as the T50 and the 4.30... and between the 4.10 and the .843 6th gear I should lower highway rpm by over 700... which I'm expecting a 10% boost in mileage... In other peoples case(yours?) they may want to run this option so they can run more power down the driveline.

OST..........10% boost in milage......cost to benefit

(but its still cool)

[oldeskewltoy]

Grega - There is another benefit... have you ever seen the ratios for the $$$$$ TRD T50 gear set???
1st - 2.341
2nd - 1.607
3rd - 1.195
4th - 1.000
5th - .886

Now compare that to 2nd-6th in a Miata box...
2nd - 2.269
3rd - 1.645
4th - 1.257
5th - 1.000
6th - 0.843

So I also get a close ratio gear set that shifts like butter and is short without having to make a short shifter for it...

[Grega]

OK. Understand now.
Awesome work mate, be interested to know how it all pans out.

And yeah they are a short shift ; in our Miata (or MX5) teh stick is only small and sits high up in the console........good fun.

[SRacin]

Hello,

So why not use a mazda clutch plate?

What the story with the cast parts?

Any better photos? How much they going to cost?

[oldeskewltoy]

Some updates..... (sorry no new photos.... yet)

what did you end up doing with the input shaft?

I have no doubt in your ability to make this work but the joining of two input shafts no matter how you do it worries me and will undoubtedly worry the market you are trying to sell these to.

Well the market will be happy(and unhappy).... there is just not enough room to fit an adpater over the input shaft. A new input shaft is going to be made! Proper length(so I don't have to shave the bell and adapter and futz with something... The bad news.... is the cost goes up because of the new input shaft... not horribly more... about $300-$400(US) more for the kit... so between $1200 and $1300 for the adapter and the new input shaft.

OST..........10% boost in milage......cost to benefit

(but its still cool)

In the US gas has risen to $4.30 per gallon(I know cheap compared to many places... but still pricey)
I fully expect to keep this trans in this car for the next 10 years....... I do expect some return... $3000???? at $6... or $8 per gallon.... it could entirely be possible!