Subaru Impreza 22B STi Type-R

[Gtx28]

Just out of pure morbid curiousity hehe Does anyone know if you can shoe horn the 04 sti running gear, and full driveline into an older late 90's Impreza two door. Has it been done? Ideas?

[proxlamus©]

Ohh yeh.. it can be done..
check out this great Subaru website.. has TONS of info on swaps like that
http://forums.nasioc.com/forums/

[Gtx28]

In the research ive done already ive seen that the new sti has a six speed gearbox compaired to the older 5 speed, and bigger diffs on both ends all around beefyer parts. But it seems that something around 400 hp is the limit for the tranny, ive heard of cryo treating the gears. I was thinking on my own that perhaps plasma nitriding might help also but whats the limit to this how much power can you make on this tranny. Anyone know off hand ?


Edit: Although not completely foreign to me, the subaru motors, and parts are not familiar to me. I dont know the motor numbers like I do GM, Ford, Mopar, Honda, Nissan, Toyota etc O thx for the link BTW

[Quibron]

Originally Posted by Gtx28

In the research ive done already ive seen that the new sti has a six speed gearbox compaired to the older 5 speed, and bigger diffs on both ends all around beefyer parts. But it seems that something around 400 hp is the limit for the tranny, ive heard of cryo treating the gears. I was thinking on my own that perhaps plasma nitriding might help also but whats the limit to this how much power can you make on this tranny. Anyone know off hand ?


Edit: Although not completely foreign to me, the subaru motors, and parts are not familiar to me. I dont know the motor numbers like I do GM, Ford, Mopar, Honda, Nissan, Toyota etc O thx for the link BTW

I have a 2.5rs that makes around 400hp to the wheels and my tranny is starting to shound like death. Luckly there are trannys out there that can handle more power, (for a price)

[puckaveli]

What's your setup? I only know a couple guys making that power from the EJ25.

Most people making that kind of power run the Type RA gearsets.

[Racing Beat]

i blew up my rear open diff on my 99 RS even before the turbo kit....hence I sold the kit and then the car...

[HanselWRX]

This thread doesn't have any videos. Boooooooo. This is technical discussion or performance mod discussion.

[Baja]

it has been done at Rallitek by one of their techs cause he wrecked his 04 STi and bought it back then bought a GC8 2.5rs 2dr coupe and stuffed everything in and it all fit perfectly like it belonged there

it's on rallitekforums.com IIRC and his s/n is punkrocksailor

[ShortysTRM]

If you have a N/A 2.5RS making 400hp, you need to hop onto NASIOC and RS25.com and let some people know how to do it. There's a company that just hit 300whp N/A with the EJ25, but I don't think I've heard of any more than that. The N/A EJ25 doesn't take to modding very well.