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Old 04-08-2013, 08:10 PM   #1
Tommyp
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Default 5 Speed Swap into a STi

Has it been done before?? Just wondering
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Old 04-08-2013, 08:13 PM   #2
BigRob74
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Old 04-08-2013, 08:17 PM   #3
Box This
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Yeah it's called a WRX with a turbo and brake upgrade.

Really though, I'll take the bait.

Why do you want a 5 speed STI?
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Old 04-08-2013, 08:18 PM   #4
07VTRex
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only for drag racing could i possibly figure this to be even worth half a thought.

still bad idea.
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Old 04-08-2013, 08:27 PM   #5
Tommyp
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Default

Quote:
Originally Posted by Box This View Post
Yeah it's called a WRX with a turbo and brake upgrade.

Really though, I'll take the bait.

Why do you want a 5 speed STI?
With all the talk out there of going from 5-Speed, to 6-Speed I'm thinking at least 1 person went the other way


Oh yeah and I forgot to add, in the United States
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Old 04-08-2013, 08:50 PM   #6
Brent22
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Quote:
Originally Posted by Tommyp View Post
With all the talk out there of going from 5-Speed, to 6-Speed I'm thinking at least 1 person went the other way


Oh yeah and I forgot to add, in the United States
Not much logic behind it. The 6 speed in the STI is better than the 5 speed in the WRX in just about all situations. Only real one that comes to mind is drag racing but then again Subarus aren't really designed for that anyway.
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Old 04-08-2013, 09:12 PM   #7
the suicidal eggroll
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Quote:
Originally Posted by Tommyp View Post
With all the talk out there of going from 5-Speed, to 6-Speed I'm thinking at least 1 person went the other way
Why would they?

You hear a lot about people swapping LS1's into rx7s, yet you never hear about people swapping a 13B into a C5. There's a reason for that, and it's the same reason people swap the STi 6-spd into a WRX, but nobody swaps the WRX 5-spd into an STi.

It's not about going from a 5-spd to a 6-spd, the STi tranny is at least twice as strong as the WRX tranny. People do the swap to increase the strength of the drivetrain, not to get more gears. Swapping the STi 6-spd out for a WRX 5-spd would be laughably stupid. That is unless they're swapping out for a fully built 5-spd in order to keep the strength but improve the gearing advantage for drag, but that's not exactly the same thing as just swapping in any old WRX 5-spd.
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Old 04-09-2013, 09:35 AM   #8
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Don't even bother, 6-speeds are better in every single way. I wonder if you can find a 6-speed gearset with a ratio simliar to the 5-speed...
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Old 04-09-2013, 10:27 AM   #9
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For the GD STIs, The 07 gear ratios are more suited for drag racing so people would choose that option over a 5-speed.
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Old 04-09-2013, 10:28 AM   #10
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Quote:
Originally Posted by Tommyp View Post
Has it been done before?? Just wondering
Don't listen to these buttmonkeys. I'll trade you my wrx 5-speed for your 6-speed sti tranny.
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Old 04-09-2013, 11:46 AM   #11
Jack
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The 5 speed has a higher top gear (better for fuel economy) and its lighter. Those make it way betterer.

Now I'm sad that my WRX has a 6 speed swap.
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Old 04-09-2013, 12:19 PM   #12
mhoerath
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ja mon, 6 spd jdm v7 in my bugeye and luv it.

Of significance front, rear and center diffs are all much better on 6spds vs. 5 spds.

trans chart:
http://forums.nasioc.com/forums/show...2173258&page=2
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Old 04-09-2013, 12:31 PM   #13
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I know its been done. I helped a member a couple of years ago with the swap over PM's. I cannot recall his name though. If I recall, it was a 2004 STi with a PPG built 5MT. The front rear and center diffs were upgraded. I think he did it for drag racing purposes.

I, on the other hand, went the other, more traditional way and never looked back. Awesome upgrade. I can't wait to send it out to have the Rallispec high speed ratio kit installed.
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Old 04-09-2013, 02:15 PM   #14
btc2112
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Quote:
Originally Posted by kpluiten View Post
If I recall, it was a 2004 STi with a PPG built 5MT. The front rear and center diffs were upgraded. I think he did it for drag racing purposes.
This is the only way a swap like that would make any sense at all.
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Old 04-09-2013, 02:21 PM   #15
A-man07
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Of course it would have to have upgraded gears. OP you should ask AndrewTech. They've done many.
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Old 04-09-2013, 03:59 PM   #16
jayman4312
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but even with upgraded gears, it still has a weaker case and other parts. the 6mt is better for drag racing, just have to get the right ratio one.
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Old 04-09-2013, 04:05 PM   #17
Mr Wrex
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Quote:
Originally Posted by jayman4312 View Post
but even with upgraded gears, it still has a weaker case and other parts. the 6mt is better for drag racing, just have to get the right ratio one.
The 6mt also has a heavier case. I don't remember who manufactures it, but there's a brace you can install on the 5mt case to keep it from flexing as much under load.
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Old 04-09-2013, 04:46 PM   #18
Badler
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Quote:
Originally Posted by Mr Wrex View Post
The 6mt also has a heavier case. I don't remember who manufactures it, but there's a brace you can install on the 5mt case to keep it from flexing as much under load.
There is a thread in the motorsports section about a company that may be making new internals for the 5 spd. They seem to think that the case flexing has to do with the design of the gears/internals. Check it out.
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Old 04-09-2013, 04:50 PM   #19
jpatt006
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Quote:
Originally Posted by Mr Wrex View Post

The 6mt also has a heavier case. I don't remember who manufactures it, but there's a brace you can install on the 5mt case to keep it from flexing as much under load.
I think Moore Performance makes these, not sure if they are a vendor though.
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Old 04-09-2013, 10:55 PM   #20
575rider
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Find a 07 tranny, taller gearing will send you 1320ft with 1 less shift, and hold up to the abuse.
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Old 04-10-2013, 01:21 AM   #21
Mr Wrex
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Quote:
Originally Posted by Badler View Post
There is a thread in the motorsports section about a company that may be making new internals for the 5 spd. They seem to think that the case flexing has to do with the design of the gears/internals. Check it out.
Too bad they haven't released it yet... my tranny decided to grenade on me last week when I was just coasting on the highway definitely an interesting idea though, thanks for pointing it out!
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Old 04-10-2013, 01:42 AM   #22
Zefy
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get the group N albins kit to convert from 6speed to 5speed...?



http://www.vividracing.com/catalog/a...-p-152848.html
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Old 04-13-2013, 02:52 AM   #23
Thug Nastiy
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If you do end up doing the swap, Ill trade you my 5speed tranny for your 6
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Old 04-13-2013, 03:54 AM   #24
i_c_the_light
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If I could do it, I would just for the hell of it. But I would run a 4.444 final drive front and rear.
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Old 04-13-2013, 11:15 AM   #25
mod maniac
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I won't bash you, I liked the longer pulls on my old 5spd and would prefer that over my 6 spd but I also did it for strength. The 5 spd would just require a different driveshaft and shifter if you got a later one. You would also have to match the rearend ratio and have the 5spd built. The 5 spd flywheel and clutch would also have to be used or you would have to do some clearancing in the bellhousing.
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