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Old 09-20-2003, 06:17 PM   #1
veilside_scooby
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Default sti 6-speed conversion

i was just curious if any one has attempted a sti 6speed conversion in a gc8 bodystyle? if so what parts are needed? and last but not least what all is envolved in converting an AT to a MT?

-allan
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Old 09-20-2003, 06:43 PM   #2
garface
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A few people have done it, I'm sure they'll chime in or someone will mention their names. As far as fitment, you just need to bang out a rib or two in the tranny tunnel.
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Old 09-20-2003, 07:55 PM   #3
veilside_scooby
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Bang out , gotta love the technical terminology i'm really curious if the new sti 6-speed would fit an ej22. if not what MT's will and which is the strongest for an ej22-t?

-?
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Old 09-20-2003, 08:32 PM   #4
garface
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The 6 speed will fit any EJ series engine.

Last edited by garface; 09-20-2003 at 08:47 PM.
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Old 09-20-2003, 09:29 PM   #5
veilside_scooby
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ok now i have a stiffy now besides a tranny, clutch pedal assembly and resevior what else do i need?

-
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Old 09-21-2003, 09:23 PM   #6
WickedRydaX
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The tranny and a lot of time to do it. Or money to pay someone to do it.
MCL
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Old 09-21-2003, 11:40 PM   #7
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you are going to need the tranny, the flywheel/clutch. Your going to have to get the hydraulic pedalbox assembly, resevoir, lines etc. Ive heard you need to messag the tunnel, you are going to need new mounts for the trans. You are going to need the matching rear differetntial, then axles (hubs?) and propshaft. its can be done for 6k with new parts. If you want the DCCD version you will also need the controler, switch and associated wiring. I am looking into doing this on my L but need to locate proper funds first.
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Old 10-07-2003, 06:10 AM   #8
morpheous
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how much power can the six speed handle. does any one know if it can be converted to front wheel drive only?
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Old 10-07-2003, 12:45 PM   #9
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1-As much as you can throw at it.

2-Not that I'm aware of. Any manual transmission cannot be converted easily. Besides, why on earth would you want to?

-Jon
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Old 10-07-2003, 04:08 PM   #10
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You do not need to smash or bang any part of the tunnel to fit a 6-speed into an impreza. The 6-speed will fit with no modifications.
IMHO I think the problem arises when people try to install the tranny with the engine still in. If that’s the case….there may be some hammering going on.


Chris
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Old 10-07-2003, 05:04 PM   #11
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Quote:
Originally posted by stimpy
1-As much as you can throw at it.

2-Not that I'm aware of. Any manual transmission cannot be converted easily. Besides, why on earth would you want to?

-Jon
1-are you serious, all the power you can throw at it? 450hp?

2-it would be for a mid engine 914 porsche. that way i can have a six speed . im already putting a 2.2 closed deck in it but with a porsche tranny. i would love to have the six speed though but it would have to be converted to FWD. how do you shift the six speed? is it a cable shifter?
thanks.
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Old 10-07-2003, 06:06 PM   #12
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The transmission was redesigned from the ground up and is vastly superior to any previous Subaru transmissions. I would feel comfortable pushing 450hp through it.

The transmission is shifted via linkage attached directly to the shift forks. There are no cables.

I'm not sure how practical it would be to permanently convert the transmission to FWD. It was originally designed as an AWD transmission and you would probably be throwing some of the design contraints out the window in doing so.

-Jon
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Old 10-07-2003, 06:14 PM   #13
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i guess im stuck with the rudimentary 5000.00 porsche tranny th. im going to contact kennedy engine to see if they have already made an adapter for the boxster transmission to a suby EJ. that is my last hope. ITs an awsome tranny it can take 700hp.
thanks for the scoop.
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Old 10-07-2003, 09:25 PM   #14
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Quote:
Originally posted by I-Speed USA
You do not need to smash or bang any part of the tunnel to fit a 6-speed into an impreza. The 6-speed will fit with no modifications.
IMHO I think the problem arises when people try to install the tranny with the engine still in. If that’s the case….there may be some hammering going on.


Chris
I-Speed USA
cescamilla@i-speedusa.com
how much would you charge to install a new 6 speed with the DCCD, into a 95 legacy that has an ej22T in it? t

thanks

dustin
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Old 10-07-2003, 09:27 PM   #15
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forgot to add that the car has the 95 AT in it right now.
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Old 10-07-2003, 09:57 PM   #16
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Quote:
Originally posted by morpheous
i guess im stuck with the rudimentary 5000.00 porsche tranny th. im going to contact kennedy engine to see if they have already made an adapter for the boxster transmission to a suby EJ. that is my last hope. ITs an awsome tranny it can take 700hp.
thanks for the scoop.
The boxster one can handle 700hp? Man I need to start working on that car, not mine.
MCL
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Old 10-07-2003, 11:31 PM   #17
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You would be hard pressed to get all the necessary parts for the STi 6speed for $5k so I would probably go with the Porsche tranny.

-Jon
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Old 10-09-2003, 08:59 PM   #18
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You can make it FWD by taking out the center diff and replacing it with a something like a spool. I don't know if anyone makes one, but you should be able to have someone fabricate it ... it's pretty simple. You basically want something that'll lock the input and ouput shafts together. Then just cap off the output where the driveshaft normally goes. It's not the optimum but I guess it's cheaper than buying a 6 speed Porsche box.

Or you could just weld the center diff solid somehow but that's a lot of extra weight. Spools are pretty light.

-Steve

Stephen.Ramm@aerosim-research.com
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