WRX 6MT Swap -- Part 2
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Originally posted by BAN SUVS
There's already a small amount of alteration in putting an STi tranny in a WRX, like the backwards clutch actuator, but I doubt there's anything that's any more complicated or involved than what you'll be doing by swapping an auto for a stick anyway. You'd have legions of fans if you dropped the 6MT in an SVX though, and then boosted it!
There's already a small amount of alteration in putting an STi tranny in a WRX, like the backwards clutch actuator, but I doubt there's anything that's any more complicated or involved than what you'll be doing by swapping an auto for a stick anyway. You'd have legions of fans if you dropped the 6MT in an SVX though, and then boosted it!
Thanks BAN
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Joined: Nov 2002
Posts: 221
From: South Carolina
Car Info: 02 WRX
I have been having a problem gettin a dive shaft
and was wondering about just making a one piece shaft has anyone tried this??
I talked to the some people in california about a alum shaft but they said that they were having problems getting it to work because of the small diameter shaft that subie's use. bUt they are sending me some tubing to make a one piece shaft out of and that there should not be any problems doing this.
Thoughts suggestions?
and was wondering about just making a one piece shaft has anyone tried this??
I talked to the some people in california about a alum shaft but they said that they were having problems getting it to work because of the small diameter shaft that subie's use. bUt they are sending me some tubing to make a one piece shaft out of and that there should not be any problems doing this.
Thoughts suggestions?
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On the SVX front...
I'm working on installing this in my 92 SVX 5 speed. To go http://www.subaru-svx.net/forum/show...?threadid=9055 for info.
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Joined: Nov 2002
Posts: 221
From: South Carolina
Car Info: 02 WRX
OK I settled on a auto wrx drive-shaft it seems to fit ok
let me just say that this transmission rocks If I ever get a shift **** and boot then I will love the car again. Down shifting to 6k in 1st wow. Just wish I had a front sure trac OH well
let me just say that this transmission rocks If I ever get a shift **** and boot then I will love the car again. Down shifting to 6k in 1st wow. Just wish I had a front sure trac OH well
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why I like the 6spd
I have few thoughts on all this.
I think subaru's 6MT is great, it has a standard 6spd layout AND they put the reverse on the right hand side, instead of the left where everyone loves to power shift from 1st to 2nd and get caught in the shift gate.
Also they did their best to resolve their "glass tranny" reputation by completely over building the 6MT.
I wish they would have gone with a much higher 6th gear for a few reasons. With the 2.5ltr engine at 14.5lbs of boost that's potentially the same as a 5ltr volumetric efficiency which means at the same RPM's as their 2.0ltr you will always be burning more fuel. If they had gone with a much higher geared 6th then you could still have 1st-5th for insane acceleration and the 6th gear would be for max MPG and high cruising speeds, along with allowing the engine to reduce its heat and engine ware.
Potentially higher top speed, although 147 governed by the ecu is not bad....just means that there are more revs in the motor to blow by that when the ecu is uncapped =)
I am just excited that they built a tranny that should take my goal of 550HP/500ft/lb tq
that should make for a killer street/strip/track car.
My rambling
-Steve Signorelli
I think subaru's 6MT is great, it has a standard 6spd layout AND they put the reverse on the right hand side, instead of the left where everyone loves to power shift from 1st to 2nd and get caught in the shift gate.
Also they did their best to resolve their "glass tranny" reputation by completely over building the 6MT.
I wish they would have gone with a much higher 6th gear for a few reasons. With the 2.5ltr engine at 14.5lbs of boost that's potentially the same as a 5ltr volumetric efficiency which means at the same RPM's as their 2.0ltr you will always be burning more fuel. If they had gone with a much higher geared 6th then you could still have 1st-5th for insane acceleration and the 6th gear would be for max MPG and high cruising speeds, along with allowing the engine to reduce its heat and engine ware.
Potentially higher top speed, although 147 governed by the ecu is not bad....just means that there are more revs in the motor to blow by that when the ecu is uncapped =)
I am just excited that they built a tranny that should take my goal of 550HP/500ft/lb tq
that should make for a killer street/strip/track car.My rambling
-Steve Signorelli
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From: Reno, NV
Car Info: 1993/2000/2001 GF4 mostly red
Steve,
Basically, 6th is so short to make it somewhat useful for hot-lapping. Fifth gear in a 5MT gives decent mileage, but is useless for racing. The 6MT actually allows use of all 6 gears on a track. And look on the bright side- at least it's taller than 5th in the R/A gearbox.
Basically, 6th is so short to make it somewhat useful for hot-lapping. Fifth gear in a 5MT gives decent mileage, but is useless for racing. The 6MT actually allows use of all 6 gears on a track. And look on the bright side- at least it's taller than 5th in the R/A gearbox.
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From: Reno, NV
Car Info: 1993/2000/2001 GF4 mostly red
Originally posted by twistedsymphony
does anyone know if a new US STi 6MT will work the same way? I've heard the 6th gear ratios are taller than the US 5MT and I figure the price would be lower because you dont have to import?
or is the US spec different enough that it wont work?
does anyone know if a new US STi 6MT will work the same way? I've heard the 6th gear ratios are taller than the US 5MT and I figure the price would be lower because you dont have to import?
or is the US spec different enough that it wont work?
You can bolt in a 6 speed, but you have to bring along some other parts as well, covered in depth in this forum.
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Originally posted by BAN SUVS
The ratio of the 6th gear is slightly taller than the old 5th, but the final drives are shorter, so rpm will be higher at a given speed in the 6MT than with a 5MT. And no, the 6MT will always be more expensive than the 5MT, which is a good thing, considering how cheap the 5MT is. You can bolt in a 6 speed, but you have to bring along some other parts as well, covered in depth in this forum.
The ratio of the 6th gear is slightly taller than the old 5th, but the final drives are shorter, so rpm will be higher at a given speed in the 6MT than with a 5MT. And no, the 6MT will always be more expensive than the 5MT, which is a good thing, considering how cheap the 5MT is.
You can bolt in a 6 speed, but you have to bring along some other parts as well, covered in depth in this forum.
I think you missed my question... yeah I know and agree with what you said but I'm wondering if the 6 speed that will be on the NEW US 2004 STi will work in my 02 WRX. I've read places that the ratios are more like the US 5MT plus a higher drive gear
I'm mostly wondering if the conversion process is the same or even possible with the MY04 US STi.
I'm assuming it'll be easier and cheeper (though still expensive) to get my hands on US parts than imported parts
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Gotcha. Sure it'll work, but your ratios will be shorter. Even 6th gear will run more revs at highway cruise speed than yur 5MT, mostly because you have to either put your WRX front diff in (what's the point of that?) or put the much shorter STi gear set in the rear diff (or use the whole thing, plus halfshafts, hubs, and brakes- darn!). It's a good thing though- you'll get less mileage, true, but your engine will be perfectly happy running at 4000 RPM instead of 3400, and you'll have a much faster, quicker, and more fun car just with the transmission. I don't know about cost. USDM engines are actualy more expensive than JDM for some reason, but they do have the benefit of being legal and all.
Last edited by Kevin M; May 20, 2003 at 02:31 PM.
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Originally posted by BAN SUVS
Gotcha. Sure it'll work, but your ratios will be shorter. Even 6th gear will run more revs at highway cruise speed than yur 5MT, mostly because you have to either put your WRX front diff in (what's the point of that?) or put the much shorter STi gear set in the rear diff (or use the whole thing, plus halfshafts, hubs, and brakes- darn!). It's a good thing though- you'll get less mileage, true, but your engine will be perfectly happy running at 4000 RPM instead of 3400, and you'll have a much faster, quicker, and more fun car just with the transmission. I don't know about cost. USDM engines are actualy more expensive than JDM for some reason, but they do have the benefit of being legal and all.
Gotcha. Sure it'll work, but your ratios will be shorter. Even 6th gear will run more revs at highway cruise speed than yur 5MT, mostly because you have to either put your WRX front diff in (what's the point of that?) or put the much shorter STi gear set in the rear diff (or use the whole thing, plus halfshafts, hubs, and brakes- darn!). It's a good thing though- you'll get less mileage, true, but your engine will be perfectly happy running at 4000 RPM instead of 3400, and you'll have a much faster, quicker, and more fun car just with the transmission. I don't know about cost. USDM engines are actualy more expensive than JDM for some reason, but they do have the benefit of being legal and all.
seems kind of silly that USDM parts are more expensive then JDM though...