no- the advantage of bigT's solution is that you can cut the bell to position the input shaft where you want. Of course that'll also dictate the position of the stick thru the hole if you don't compensate for that. The miata solution typically is the adapter plate because it is easy and cheaper than the welding- and it works for as much power as anybody has made.
|
So does anyone have a rx7 bellhousing?
|
Subscribing...pretty impresive bigturbo...
I wanna see someone start pumping out adapter plates to allow for bolt on trans's...very interesting topic guys |
Originally Posted by m2cupcar
(Post 204997)
no- the advantage of bigT's solution is that you can cut the bell to position the input shaft where you want. Of course that'll also dictate the position of the stick thru the hole if you don't compensate for that. The miata solution typically is the adapter plate because it is easy and cheaper than the welding- and it works for as much power as anybody has made.
|
Loki - I have one rx7 bell, attached to the box. But I'm not going to give it up yet, not until I've completed the project. What I did was just call around to mazda shops until I found that had two of the boxes that were in the way. They gave them to me. Same shop gave me three 1.6 engines like five years ago. The owner is a racer, so he'd rather give them to me than the junk man. IMO a lot of these owners will take interest if you tell them what your up too - like a 300hp miata...
I thought there was somebody in fla on m.net that did a bunch of adapter plates... don't know if it ever came to fruition. I do think that Loki could probably sell at least 5 of them- more if he pushed them on m.net. Just need to figure out what it's worth to others, and to him. I can't. I'm not doing it that way- different engine. I'm using a van bell housing which has the normal clutch fork position. I've already been through the resolution for the process on my own tho. I'm using a b2000 truck bell on a miata housing with an 80s 626 flywheel, 1.8 Miata clutch & pp. I made all my adjustments to ensure proper engagement/disengagement through the slave rod length- trial and error. |
Originally Posted by PaKMaN
(Post 204904)
I'm still trippin about the fact that you have a greddy E manage
Originally Posted by BIGTURBO
(Post 204074)
Originally Posted by Savington
(Post 203998)
:magna::magna::magna:
Almost seems like sacrilege to be running a GT2876R on an E-manage. How much power? Actually, the EM in my setup, is a custom, DIY management with 8 injectors, and it is very easy to tune. At off boost situations,cold starts etc, is like a stock miata. Something that is very difficult to find and tune with stand alones. |
Did you swap out tranny interals for better gearing?
|
The lever it's almost at the stock position (1 cm behind) as you can see at this foto
https://www.miataturbo.net/forum/att...1&d=1201133301 For some of the other questions, sorry but I cannot follow some of the elaborator meanings (not very good english :dunno: ) If I had better explains to some meanings maybe I could help better. But I thing that the most have understand tottaly about the modification.:) |
Originally Posted by magnamx-5
(Post 205428)
Did you swap out tranny interals for better gearing?
|
how much did you cut off of each bellhousing?
|
car
Dude, This is sweet. And to mod and weld something that works great under that force is awesome!!!!:bowdown:
|
hmm do any b6 or bp trannies have bolt on bell housings?
if so then an adapter plate between the gear box and the bell housing would be a an easier and better solution to an adapter between the block and the tranny. |
How's this holding up now that you've been driving it for a few years?
|
Originally Posted by BIGTURBO
(Post 204681)
Because I have many answers about this modification, I decided to open a topic for this.
Well The miata transmission is very nice, but can't handle safely more than 250 WHP. At stock situations or at light turbo setups you 'll not deal with problems, but with 300+ WHP the 2th or 3th gear sometimes will gone :magna: So there are two solutions 1)exotic stuff gears (os giken, quaife etc) but very expensive 2)adaptate transmission from another car, more inexpensive from the first solution but very difficult to do a perfect job. So I put a turbo trans model "R" from RX7 fd3s (93-95). It was from the beginning a difficult modification but the engineer succeed in this 100%.:bowdown: The gear lever is exactly in the same position like the stock, and the "sense" of changing gears maybe is better than a stock transmission miata. The 1-2-3d gears are a little shorter than stock gear ratio The 4th is the same 1:1 ratio And the 5th is much longer than stock ratio!! And this is very nice for a 380+ hp turbo miata! :cool::cool: The modification based to a new housing between the block and the RX7 transmission. We modificated the miata housing (bellhousing? ) and connect to its end, the end of the RX7 housing.It was a very difficult job because it had to be perfect at straight line with the stock one. You will see at the fotos what exactly we have do because my english are not so good to explain exactly what I want to tell.:hustler: The driveshaft was cut and modificated to match to the RX7 transmission. Don't know why you would want an FD tranny. They aren't exactly known to be reliable. Ask me about my two broken trannys from my FD sitting in my shed. |
Originally Posted by falcon
(Post 582301)
Don't know why you would want an FD tranny. They aren't exactly known to be reliable. Ask me about my two broken trannys from my FD sitting in my shed.
|
The first one shredded 3rd gear shifting from 2nd WOT when the car was stock. Approx 250ish whp. The second I blew the 5th gear syncro (known problem in the FD trans) at 380whp. The current one is holding strong. We'll see how it lasts.
FD guys swap TII trans in because they are stronger. Go for the TII. Guys on the FD forums are known to refer to the FD trans as glass... lol |
From what I have seen doing research, the only differences between the TII tranny and the turbo FD tranny are the syncros which made it shift better (although it would appear otherwise in your situation). Powerwise I'm being told it's a wash. I've gotten all this information from FD owners.
|
You're right on the smoothness of shifting. The TII won't be right there... but from my understanding it will hold more power and take a bit more of a beating before any issues arise.
Realisticaly, for a Miata power wise you're OK with either. Syncro wise, I would say to go with the TII. Or have an FD box rebuilt with all new syncros and run good fluid from the get-go. |
What's odd is that those transmission are both essentially the same unit- based on the same Mazda R gearbox. I suppose it's possible that changes to improve drivability were done at a compromise to strength. You never hear of people braking the TII version in a Miata- and this is the only case I know of that is using the FD box.
|
bad ass swap. FB rx7 guys have been using the Miata gear sets for years not I was waiting for the reverse to happen.
|
All times are GMT -4. The time now is 12:46 PM. |
© 2024 MH Sub I, LLC dba Internet Brands