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  #16  
Old 06-17-2011, 06:26 PM
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Re: If you had a 400HP engine........

Quote:
Originally Posted by icingdeath88 View Post
I hope you're being sarcastic.
Hey, look ev'rybody! I got one!
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  #17  
Old 06-17-2011, 08:13 PM
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Re: If you had a 400HP engine........

Quote:
Originally Posted by icingdeath88 View Post
How many hours of labor is required for a 400 hp SVX?

If you're going to spend a ton of time/effort on the engine, use the right transmission for the job.
What if the engine is done? You are assuming too much. Now, if someone were to sell an SVX with an already installed MT but a blown engine, I might view that as a potential marriage partner.

Now, how about some data on the labor requirements and the final drive ratios.......
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  #18  
Old 06-17-2011, 08:28 PM
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Re: If you had a 400HP engine........

Prob'ly would help to know the whole story? Less assumed that way.
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  #19  
Old 06-17-2011, 09:23 PM
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Re: If you had a 400HP engine........

Quote:
Originally Posted by LetItSnow View Post
Hey, look ev'rybody! I got one!
Most people would after driving that machine!
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  #20  
Old 06-17-2011, 11:13 PM
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Re: If you had a 400HP engine........

Quote:
Originally Posted by LetItSnow View Post
Prob'ly would help to know the whole story? Less assumed that way.
Seconded. Now you've got to enlighten us.

Final drives:
Autos the obvious choice would be a 4.44

STi 6-speeds are 3.90 from what I've seen

WRX 5-speeds are 3.9 front, some (I forget what year they started) are 3.545 rear

There are also Forester STi 6-speeds that are 4.44 final drives, but those tend only to be used in very specific applications. Would be too low for comfort in an SVX.

I am not sure about the Legacy 5 or 6 speeds.

The rest are not as beefy, so I guess it doesn't really matter.

My vote would be a 6-speed (no way!) with a front LSD, DCCD, and not as short gear ratios as what I have. 07 or 08+ basically. The DCCD ones are rear-biased, if that helps.

The 6-speed I have works fine, but I feel like it would be more suited for a car that doesn't have much torque at low revs (like an STi before the turbo spools up). The EG33, even stock, has plenty low/mid range torque, so more normal ratios would do just fine. Although, it is a delight to be able to pass at highway speeds without shifting down from 6th.

It honestly depends what you're trying to build exactly. A pure track car is different from a trackable daily driver.

Now, more about this 400HP motor....?
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  #21  
Old 06-17-2011, 11:17 PM
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Re: If you had a 400HP engine........

Quote:
Originally Posted by icingdeath88 View Post
My vote would be a 6-speed (no way!) with a front LSD, DCCD, and not as short gear ratios as what I have. 07 or 08+ basically. The DCCD ones are rear-biased, if that helps.
The '08 6MT uses a different speed sensor setup, so if you want to keep a speedometer '07 is the latest year you can go up to.
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  #22  
Old 06-17-2011, 11:21 PM
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Re: If you had a 400HP engine........

Quote:
Originally Posted by Crazy_pilot View Post
The '08 6MT uses a different speed sensor setup, so if you want to keep a speedometer '07 is the latest year you can go up to.
Good to know. Remember, you can still probably use the gears from the newer ones though. If you find a cheap one that needs a rebuild anyway, for example. I really wish I had found a higher 5th and 6th while mine was apart to have reverse fixed.
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'97 Ebony LSi ~137k #036.......Power mode mod, JDM clear corners, BBS wheels. AUX/pocket mod

Now a mod "over there" ............Photo album
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  #23  
Old 06-17-2011, 11:48 PM
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Re: If you had a 400HP engine........

Forester STi 6spd still uses a 3.90 final drive. Your thinking of the FXT 5spd manual thats a 4.44 final drive.

Having owned one, I can truely say the gear ratios in the 04-06 STi boxes are flat stupid for USDM STi engines. Likely the same for a 400hp EG33 unless it does so by murdering the low and midrange power. (non forced induction).

1st is imo simply too short for a 400hp STi. I'd love to see a 6spd with full STi diff package and the Spec B gear ratios... and a 3.545 final drive. Either that or 4.11's and a good carbon/carbon twinplate clutch for 2nd gear launches.

Anyhoo, 6spd ratios from

http://www.rs25.com/forums/f8/t10004...ts-ratios.html

All-Wheel-Drive 6-speed Transmissions
3.636 / 2.375 / 1.761 / 1.346 / 1.061 / 0.842 / 3.900FD
- JDM Impreza WRX Spec C/STi/STi Spec C RA/V-Limted/S202/S203/S204/Spec C RA-R
- AUS Impreza WRX STi

3.636 / 2.235 / 1.521 / 1.137 / 0.971 / 0.756 / 3.900FD
- USDM 2007-current Impreza WRX STi

3.636 / 2.375 / 1.761 / 1.346 / 0.971 / 0.756 / 3.900FD
- USDM 2004-2006 Impreza WRX STi
- UK/Europe/NZ Impreza WRX STi
- JDM Legacy 3.0R Spec B

3.636 / 2.235 / 1.521 / 1.137 / 0.891 / 0.707 / 3.900FD
- USDM 2007-current Legacy 2.5GT Spec B
- JDM Forester STi
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  #24  
Old 06-18-2011, 03:48 AM
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Re: If you had a 400HP engine........

PPG straight cut gears, It'll make a hell of a racket, but it'll stand up to anything

http://www.youtube.com/watch?v=kaZ0K...eature=related
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  #25  
Old 06-18-2011, 08:59 AM
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Re: If you had a 400HP engine........

Quote:
Originally Posted by XT6Wagon View Post
Forester STi 6spd still uses a 3.90 final drive. Your thinking of the FXT 5spd manual thats a 4.44 final drive.

Having owned one, I can truely say the gear ratios in the 04-06 STi boxes are flat stupid for USDM STi engines. Likely the same for a 400hp EG33 unless it does so by murdering the low and midrange power. (non forced induction).

1st is imo simply too short for a 400hp STi. I'd love to see a 6spd with full STi diff package and the Spec B gear ratios... and a 3.545 final drive. Either that or 4.11's and a good carbon/carbon twinplate clutch for 2nd gear launches.

Anyhoo, 6spd ratios from

http://www.rs25.com/forums/f8/t10004...ts-ratios.html

All-Wheel-Drive 6-speed Transmissions
3.636 / 2.375 / 1.761 / 1.346 / 1.061 / 0.842 / 3.900FD
- JDM Impreza WRX Spec C/STi/STi Spec C RA/V-Limted/S202/S203/S204/Spec C RA-R
- AUS Impreza WRX STi

3.636 / 2.235 / 1.521 / 1.137 / 0.971 / 0.756 / 3.900FD
- USDM 2007-current Impreza WRX STi

3.636 / 2.375 / 1.761 / 1.346 / 0.971 / 0.756 / 3.900FD
- USDM 2004-2006 Impreza WRX STi
- UK/Europe/NZ Impreza WRX STi
- JDM Legacy 3.0R Spec B

3.636 / 2.235 / 1.521 / 1.137 / 0.891 / 0.707 / 3.900FD
- USDM 2007-current Legacy 2.5GT Spec B
- JDM Forester STi
Thanks for that information. From what I have dug up, the JDM Forester STi has 3.9FD and the Forester XT has 4.111.
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  #26  
Old 06-18-2011, 01:00 PM
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Re: If you had a 400HP engine........

Has anyone ever thought about using the retardedly short geard 22b sti 5 speed?
Input please.
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  #27  
Old 06-18-2011, 01:54 PM
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Re: If you had a 400HP engine........

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Originally Posted by 92_LSL View Post
Has anyone ever thought about using the retardedly short geard 22b sti 5 speed?
Input please.
I know someone with one with a sheared 3rd gear
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  #28  
Old 06-18-2011, 02:31 PM
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Lightbulb Re: If you had a 400HP engine........

Quote:
Originally Posted by XT6Wagon View Post
build automatic for dragracing/daily driving, 07-09 Spec-B 6spd for mixed normal driving/light track days, STi 6spd with DCCD for more hard core stuff.

The STi 6spd preference will also depend on car setup and desired use.

04 has very agressive front LSD, 34/66 split (dyno says its really more like 20/80 before center diff lock up)
05 has a more sane front diff, same 34/66 split, but oem DCCD auto mode is better.
06 gets a 41/59 split.
07 gets new better ratio pattern and torsen rear LSD.

If you like the Spec B's tall ratios, the JDM forester XT uses them also, but has a front limited slip unlike our SpecB. Dunno about their legacy. Oh and the 2010+ legacy 6pd is based on the old 5spd, but past that I know little.
2004 STi transmission used a SureTrac mechanical front differential. This diff was good for drag racing, but Autocrossing and tight turns were not it's forte' as it was quite aggressive on putting it's power down. My personal experience in Autocrossing all years of STi (04 - 07) has shown me that the 04's were my least favorite.

2005 STi transmission used the same gear ratios as the 2004 but switched to a Quafe mechanical front differential. This diff was MUCH better for Autocrossing / Track Racing / Tighter turns than the SureTrac. The down falls this year (and indeed with the 2004's as well) was the center diff. When approaching a corner (on track obviously) at high speed, when the driver would go hard on the brakes, the center diff would unlock. Then mid corner when the driver got back on the power, the power delivery was much like the 04 front differential, rather harsh. This (combined with the very rear bias torque split) almost always caused a nice amount of tail out Oversteer. Looks cool, and is alot of fun, but isn't the fastest way around a track.

2006 STi continued with the 2005 Quafe mechanical front diff, and the gear ratios of the previous 6MT's. The differences this year came in the form of a revised center differential. The torque split was changed to a more neutral split than the previous years. Also a steering angle sensor was added to assist in the control of the center differential. The changes provided MUCH more controllable and consistent lap times. These mechanical changes made this transmission the one to have if you were an Autocrosser / Track Racer. However, because of the exterior body changes this year, many people stuck with the 05's because they thought the 06's were ugly... NOTE: If you are thinking about using an 06+ STi trans, make sure you RESEARCH the use of the steering angle sensor. That is where the advantages of this year trans come into play, but if I'm not mistaken, it is routed through the STi's ECU, and quite complicated... So an 04 - 05 STi trans may be the best (and easiest) years to use for swaps...

2007 STi saw A BUNCH OF CHANGES...
- New gear ratios (2 - 6)
- New rear Torsen mechanical differential (verses the clutch type of previous years)
- The removal of a driven transmission fluid pump (not sure exactly how the 07's circulate fluid - some sort of splash system)

For some people, these changes meant for a better car. However when I was shopping for an STi in 2008, I saw too many downfalls with the 2007 over the 2006, such as:
- everything above regarding the transmission
- removial of Aluminum suspension components - replaced with steel WRX units
- MANY engine issues - largely chalked up to the very different and quite complex ECU
- Removial of sodium filled exhaust valves
- Different heads on the EJ257...

So to make a long story shorter, I stuck with the 2006...

2008+ I stopped caring about the STi... Subaru just changed too much with the newer GR chassis cars. Yes I know some of the changes are really good (lighter overall bodys, the ability to tuck 9.5"+ width wheels with the correct offset, i-Drive, etc), but to me - it was a diversion from the Subarus of past. It was more of a main-stream car than a "hot rallycar"... But my opinions of the GR's are pointless, and off topic. I just wanted to update and clarify some of the transmission details listed in the above post

Quote:
Originally Posted by 92_LSL View Post
Has anyone ever thought about using the retardedly short geard 22b sti 5 speed?
Input please.
WHY would you think about doing that? I think the only word for that would be (as you put it) RETARDED... You have a large H-6 engine in the SVX. Large engines make torque. With large torque, you don't need short gear ratios... Infact if you have really short gear ratios, you are really just wasting alot of the engine's potential... The standard STi gear ratios (2004 - 2006) are short enough in the SVX. I drove TomSVX silver 6MT car a while ago and I remember thinking to myself "good god, did I change gear - because the engine RPM barely dropped"... Now the STi trans in the STi, behind the EJ257 is a great combination. Because when you are on boost and change gear, the LAST THING you want to do is fall out of the sweet spot. Because the ratios are so close, you never really fall out of it. The 5MT WRX trans is alittle long geared for a stock WRX, but in the SVX, the gearing was great...
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  #29  
Old 06-18-2011, 05:20 PM
XT6Wagon XT6Wagon is offline
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Re: If you had a 400HP engine........

The real problem with the more agressive split of the 04-05 transmissions is that it forced Subaru to dial in tons of understeer when off power. The 04 doubled down on this with the rather dangerous front diff. Nothin says fun like a diff that goes from pulling the front to the inside of a corner quite hard, to pulling quite hard to the outside if you need to counter steer. Which might be needed since the hyperactive front diff can pull the front of the car into a much tighter line than the back till you are going to have a nice highspeed off on the inside of the corner. So some drivers would get in trouble, quickly switch to countersteering and in an instant do a 4wheel drift into the outside ditch.

Haven't tried the newer transmissions, but one reason I like the more agressive powersplit of the 04-05 is that you can dial it out with the center diff. You can't dial in more with it.
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  #30  
Old 06-18-2011, 08:18 PM
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Re: If you had a 400HP engine........

Quote:
Originally Posted by XT6Wagon View Post
The STi 6spd preference will also depend on car setup and desired use.

04 has very agressive front LSD, 34/66 split (dyno says its really more like 20/80 before center diff lock up) The front and rear diffs used in 04 will not stand high power forever, they use a LSD style that puts little metal "chicklets" in shear forces. Look up cam and pawl LSD.
05 has a more sane front diff, same 34/66 split, but oem DCCD auto mode is better.
06 gets a 41/59 split.
07 gets new better ratio pattern and torsen rear LSD. In 07, FHI eliminated the transmission oil pump. Something to keep in mind.
More information:

http://forums.nasioc.com/forums/showthread.php?t=665334

http://forums.nasioc.com/forums/show...on+differences
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