which transmission for 20b?
 

is the factory fd gear box strong enough for a 650-700hp 20b for street use and tracks on the weekend? I considered a viper t56 but im concerened about getting the gearing right. also I prefer the 5 speed , but not if I have to rebuild it every time i turn around.

try the Supra MKIV Getrag tranny.

call Carlos Lopez // CLR racing, he sells a adapter kit so you can fit the tranny on a 20b

hi,

Does anyone know how the Supra gearbox goes in a FD tunnel? From memory they are a substantially bigger gearbox than the FD 5-spd and would need fairly substantial mods to the tunnel and PPF??

cheers,

Rob.

CLR Getrag V160 to Rotary Kit
 

It's been quite a long time since I've been on the forum.

A friend/ customer informed me that ppl. were looking for this information.
These pics illustrate how the Supra 6 speed box fits within the Tunnel of the Fd.
This installation illustrates a 20b on a stock sub-frame.
The engine in it's present location sits slightly higher than stock or substantially higher than those using aftermarket sub-frames, and still there is plenty of space. The Tunnel is stock.
The PPF. must be replaced w/ a Torque Arm like what the V-8 guys use.
A Transmission mount and custom Drive shaft must be fabricated

http://smg.photobucket.com/albums/v1...h_P1016136.jpg

http://smg.photobucket.com/albums/v1...h_P1016111.jpg

http://smg.photobucket.com/albums/v1...h_P1016110.jpg

can you post more information on this setup please GT1?

Here are larger images


Attachment 710098

Attachment 710099


Attachment 710100


There is adaquate space both on the Tunnel both on top of the gearbox and below.
On this instalation, there are (2) two 3" inch down pipes in the lower right side, one for each Turbo.

how much is the kit?

Here are pics of the full Kit on a rather large rotary engine !

Attachment 710108


Attachment 710109


The Kit consist of exactly what U see :
The adapter plate, a custom built "Tilton" style Starter, the Starter mount, and all the hardware.

It requires the use of the smaller diameter "NA" style aftermarket Flywheels.
The larger Turbo flywheel will NOT fit within the Getrag's Supra type specific bell housing limitations.

There are countless Manufactures of these type of Flywheels, ie:
Fidenza, Tilton, Quarter Master, Bilington, Mazda-speed, ACT, and so on.

Clutch packages are also abundant in many different configurations like dual disk, triple disk, 8.5" diameter, 7.25" , 5" or even 4.5"
I have heard of 1 particular 10" dual disk setup ... BUT have not confirmed it.

Also, there are many types of friction materials available to suit any particular need, application or budget.
Anything from Organic linings to Ceramics, to Sintered Iron facings to full Carbon/ Carbon.

I will try to post this information on all the other threads on the subject of transmission options for High powered Rotary engines.

Price for the Kit is: $ 1795.oo + Shipping.
You must provide the gearbox and the Clutch & Flywheel package.

Kits are available and in stock.


GT1-20b
CLR. Motorsports Ltd.
(305) 235 3696

man.. that's like a 7k upgrade for a tranny. i def have to think about this one

does the shifter line up in the stock position? can you post some interior shots to confirm please?

Also, I noticed the pictures do not include a mount for the transmission. I would think for the price, a solution for mount this transmission to the stock fd mounting spots would be included, otherwise this is an incomplete solution. Just my opinion tho.

I am not trying to take away from Carlos.. But I do think there are other options besides the Supra 6speed.

I'm personally interested in the SMG from a BMW M6 (7 speed sequential shift) & the viper T6060 transmission. The M6 SMG has its clear advantages but like the supra trans, it's about $4k (used). Seems like the T6060 transmission would be a good solution too in addition to the plethora of options.

^--- +1

What he said..

GT1-20b, why does this engine use '74-'75 housings?

i would speculate those pictures are of a dummy block. probably for test fitting the trans.

couldnt use 74-75 housing with 20b irons anyway.


EDIT: on second thought, the completed engine is a 4 rotor, and doesnt have the 20b mid piece. Perhaps he constructed the 4 rotor with pre 86 irons?

Looks like 12a housings as well.

does a T2 or FD tranny fit the 20b?? jus asking...

Fairly certain.

Also, how much abuse are you going to put it through? I know a guy down here that has a 600whp FD that he dragstrip launches (on full slicks) through the stock drivetrain, and it doesn't break (well not all the time :lol:)

all rotaries since 74 have had the same bellhousing bolt pattern. only exception being the fd auto 13B, which had an extra bolt hole.

So yes, it will work.

So the length and spline of the supra transmission shaft fits without modification?

do you have any more pics of this engine??? looks like a 4 rotor to me

ok cool, cuz i will be beginning 3 Rotor FC project sometime next month and i have a FD and T2 tranny in my garage just sitting.. so i will try and bolt one of these up, and my car will be only a weekend drifter..

Has anyone tried using the Honda S2000 transmission as it can handle high rpm & hp and can also fit within our transmission tunnel. It has to be one of best 6 speed trannys available.

can it really handle 500+ ft-lbs of torque? I havent heard that, and it would surprise me if true...