cardriverx

iTrader: (12)

god I want a dog box just for the noise lol

j_man

Look at mnet. I.e. Boig's car.
IIRC Mazdacomp sell the Miata tranny - a straight gear, sequential dog box and the name is MRT-1 (Mazda Race Transmission). According to Gibb the price is $14K.

leatherface24

iTrader: (10)

raceonusa used to get HKS S.MT's for 12k. They were for the FD's and at the time I had mine, I was super close to getting one but then I was 2k short of affording it. They dont carry them anymore but im sure it could be made to fit one of our cars

eunos1800

I've looked into various options on gearboxs as i need a Auto.

As everyone else already said even used Sequential boxes go for 3 times the value of most Miata's.

How about a tranny with paddle shifts though?
Most paddle shift gearboxes have the option of push/pull on the gearstick sequential type gear shifting.

I made enquires about the various VAG DSG boxes, but they're 4wd and mounted the wrong way.
The BMW M3 SMG gearbox looked like a option, but electronically at least it's pretty much 1 package with the motor and the M3 motor is too tall to fit in a Miata.

There are some companies that offer paddle shift kits for various slush boxes, but i can't imagine anything worse than competing in circuit racing with a slushbox.

Is there not any US cars with DSG, SMG boxes that are rwd?



Cheers
Mark

Joe Perez

iTrader: (8)

Even in race apps, reverse is often required by the rules. SCCA Solo for sure, except in a couple of specific classes. But reverse is easy, Quaife sells an inline reversing box which is what all the MC-powered LoCosts use: AUTOTECH - Quaife Torque Biasing Differentials, Close Ratio Gearkits, Racing Transmissions, Custom Driveline Components


Got a link? You have aroused my curiosity.


It depends on the auto.

The flappy-paddle gearboxes that you see on high-end applications like formula cars, Ferraris, and Nissan GTRs are internally quite similar to manual transmissions. They use syncromesh gears and have computer-controlled clutches.

But the vast majority of paddle-shift transmissions on "regular" cars are in fact bog-standard automatics where the control system for the hydraulic solenoids incorporates a semi-manual input interface. Internally, they still have torque converters and planetary gears. This is not to say that it's impossible to build an automatic which shifts nicely (the drag guys have elevated this to an art form) however I've never seen a Miata automatic set up in such a way as would be acceptable to a stick-shift purist.

j_man

Here is the web page of Boig's car (check pages 1,2,3 - alas no pic of the transmission itself):

http://www.cardomain.com/ride/350414

The $14K I remember from few threads at mnet where GibbP mentioned the sequential transmission bolted to Miata engine and the price

mazda/nissan

iTrader: (2)

I saw prices like $12K and $14K for places I've never heard of, when for that price I could get a gearbox from a very reputable company such as Hewland for about $8000 with 6 forwards and 1 reverse gear (this gearbox also has a Powerflow differential, which I have no idea what it is), and is capable of handling 240 lb. ft. of torque, which would put us in what about the 260-270 HP range?

Hewland FTR Gearbox Specification

mazda/nissan

iTrader: (2)

mazdacomp's transmissions

http://www.mazdamotorsports.com/pdfs...ansmission.pdf

Joe Perez

iTrader: (8)

One little problem- that box you linked to is a transaxle, intended for mid-engine applications. That's why it includes a diff.

Hewland has three front engine, rwd boxes, which are listed as "in tunnel" on their main specs page. They are the MVE-STA, the SGT, and the IGT-C.

I can't find the MVE-STA on any price sheets, but the SGT is £10,020 ($15,312) and the IGT-C is £12,385 ($18,926). And that's just for the bare gearbox itself- you still need to have a custom bellhousing made.

karter74

iTrader: (4)

Ikeya Formula makes an adapter for many cars to change the H-pattern to sequential, unfortunately they don't make one for the Miata....

PRODUCT INFORMATION

mazda/nissan

iTrader: (2)

well joe I take it those are for longitudinal mid engine applications? If so couldn't one just mount the gearbox back there corvette style? I know the space would be non existent, but if your already going through the hassle of mounting this to a car, making room shouldn't be out of the question

mazda/nissan

iTrader: (2)

karter i suppose one could adapt an RX-7 transmission to a miata. However the site lacks information such as how the hell this works. It might switch it to a sequential type gearbox, but I see no mention of dog gears.

mazda/nissan

iTrader: (2)

ok I hypothesize something. Get an FD transmission, buy the IKEYA sequential conversion, and then throw in the PFITZNER RX-7 gears, so that one could utilize a sequential clutchless shift. What do ya think?

I found some info on putting in the FD transmission

http://forum.miata.net/vb/showthread.php?t=224897

apparently there are also adapter plates, but i can't find them

TurboTim

iTrader: (9)

Hehe that's nice, keeps reving and reving. Fun stuff.

mazda/nissan

iTrader: (2)

ok well I got back information from Pfitzer aka PPG (didn't know they were one and the same) and

We are nil-stock on this product and will not be putting it back into production until we receive orders for 5 or more sets which may be mid this year. The cost was approximately $7800aud

so we're talking $5455.32 for the Miata dog gears, and then another $1573.03 for the Ikea sequential shifter for an FD (silly me forgot to ask about the RX-7's gears instead of the Miata's, but I am sure they are close in price). Throw in an FD transmission, some sort of fancy adapter plate to fit the transmission to Miata, and for $7428.35 (roughly) you could have yourself a bulletproof sequential gearbox for the miata.

karter74

iTrader: (4)

Just google ikeya formula, there is a small bit of info on it. It is an extremely well engineered piece that does the normal H-pattern movement for the transmission from the normal sequential motion the driver does. In other words, it does the H pattern shifting for you, transforming your experience into a sequential shifter.

mazda/nissan

iTrader: (2)

yeah and thinking it was as simple bit of kit, I asked a few people I found who had them that if you kept upshifting it would unknowingly shift into reverse, but somehow depending on which car they have blocked out the reverse gear unless you pull a special tab. Really piece o' machinery.

Oscar

iTrader: (2)

the ikeya thing looks nice
wouldn't sadev be able to make/convert a miata compatible sequential box?

GT3man2001

Apparently Quaife is currently in development of a Miata sequential gearbox for about $7500.

ZX-Tex

iTrader: (15)

Cha ching... I guess if you really, REALLY want one, or are racing and have to have it to be competitive, but damn... There are some other things I would rather have for that kind of money; that is some significant opportunity cost.