how do you change the power to the wheels distrabution

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Dec 17, 2002 | 12:13 PM

little eberz

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how do you change the power to the wheels distrabution

i herd that the power is distrabuted 60\40 60 up front and 40 in rear. I would like 40\60 how can i change this any sugjestions would help or advice.
thanks

Dec 17, 2002 | 02:59 PM

bamfwrx

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From: South Carolina

Car Info: 02 WRX

I guess you would have to modify the center diff somehow
I think the the sti center diff or any thing but a North American diff has a diff torque split

btw they are not cheap

Dec 18, 2002 | 10:35 AM

live311

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From: The Black Hole of New England (CT)

In order to answer your question we need to know what kind of car you have and the transmission type. Subaru uses 3 different AWD systems, depending on the model and transmission. If you have an auto trans you might be able to hack into the TCM and re-program it. If you have a 5-speed there's nothing you can do because it's a purely mechanical system. You'd probably have to find an STI adjustable center diff overseas and swap it in.

Dec 18, 2002 | 09:08 PM

Kevin M

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I'm not 100% on this, but I think the 4EAT is 60 rear/40 front.

Dec 23, 2002 | 09:37 AM

Fletcher

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I have a 98 RS with an auto trans, and I've read that in "normal" driving the torque split is 90/10 (front/rear), and the TCU adjusts up to a max 50/50 split when the fronts slip. The way my car behaves, I tend to believe this senario. I too would much prefer a 40/60 (front/rear) split. I've heard of all sorts of combinations, but I have no specific information relative to the auto trans.

I hope someone out there can tell us where we might find a rear biased center diff., or at the very least how to set the existing diff at a 50/50 fixed split (possibly a TCU mod).

It would be great if we could identify another U.S. model (ie Legacy, SVX, etc.) that would provide a salvage yard source for rear biased auto trans center diffs.

Dec 23, 2002 | 07:21 PM

Kevin M

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From: Reno, NV

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Quote:

Originally posted by Fletcher
I have a 98 RS with an auto trans, and I've read that in "normal" driving the torque split is 90/10 (front/rear), and the TCU adjusts up to a max 50/50 split when the fronts slip. The way my car behaves, I tend to believe this senario. I too would much prefer a 40/60 (front/rear) split. I've heard of all sorts of combinations, but I have no specific information relative to the auto trans.

I hope someone out there can tell us where we might find a rear biased center diff., or at the very least how to set the existing diff at a 50/50 fixed split (possibly a TCU mod).

It would be great if we could identify another U.S. model (ie Legacy, SVX, etc.) that would provide a salvage yard source for rear biased auto trans center diffs.

Well, if you're really serious about it you can get a shop to weld your center diff together, which would give you full-time 50/50, but that would suck, because the limited slip center diff is the biggest difference between AWD and 4WD. In case you are wondering which is better, hop in someone's 4WD truck, lock the diffs and take a spin around the block. NG. There are racing applications that might benefit from it, but trust me, Subaru's engineers are some smart cats, and everything on your car is the way it is for a reason. (The reason isn't always performance, but there isn't anything done just because.)

Dec 27, 2002 | 10:25 AM

WRXSTIle

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From the way I understand it the AWD system is more complex than a simple 60/40 or 40/60 split. For instance during acceleration the power is sent to the rear wheels since that will afford the best traction as that is where the weight shifts. It is also changed during cornering to allow power going to the wheels with the best traction. Then during straight lines I guess it doesnt matter to much where the power goes.

Dec 29, 2002 | 11:46 AM

stealth-wrx

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From: Lake Forest, Calfornia

Car Info: 2004+ Two Tone Green

you will need an electronic center diff. you would definately want to buy a use one. the control piece for it is $250 and the diff in anywhere from $500-$5000. email me if you want more info. with the diff you can put a max of 65 or 70 in the rear and 35 or 30 up front.

Dec 29, 2002 | 04:00 PM

RebelINS

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If you are willing to spend some money on this, just get an RA or Type R trans, then you can have control over your torque split, and stronger internals.

-Wes

Dec 29, 2002 | 08:34 PM

#10

Kevin M

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From: Reno, NV

Car Info: 1993/2000/2001 GF4 mostly red

Quote:

Originally posted by RebelINS
If you are willing to spend some money on this, just get an RA or Type R trans, then you can have control over your torque split, and stronger internals.

-Wes

Type R transmission? What is that?

Dec 29, 2002 | 09:02 PM

#11

WRXSTIle

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A type R transmission is a transmission with a tyrpe R sticker on it said to greatly improve tourque and HP as well as bullet proofing your transmission so you can always do 5000 rpm clutchdrops.

Or its the xmission for the STI type R that Subaru made.

Dec 29, 2002 | 09:36 PM

#12

Kevin M

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From: Reno, NV

Car Info: 1993/2000/2001 GF4 mostly red

Quote:

Originally posted by WRXSTIle
A type R transmission is a transmission with a tyrpe R sticker on it said to greatly improve tourque and HP as well as bullet proofing your transmission so you can always do 5000 rpm clutchdrops.

Or its the xmission for the STI type R that Subaru made.

Just checking, because I've only heard of STi and STi RA as WRX models.

Dec 30, 2002 | 01:23 AM

#13

toasteRS

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What about replacing the viscous LSDs in your subi with Torsen or Quaife LSDs? I doubt you could go past these:

http://www.torsen.com/products/T-3.htm

http://www.torsen.com/products/T-2.htm

and check out the Quaife site:

http://quaife.co.uk/index2.htm.

All I know is that before spending up big on suspension I would look into upgrading all the diffs in my car to either torsen or quaife products, depending which company had the right product for Subies.

Dec 31, 2002 | 03:11 AM

#14

RebelINS

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Quote:

--------------------------------------------------------------------------------
Originally posted by WRXSTIle
A type R transmission is a transmission with a tyrpe R sticker on it said to greatly improve tourque and HP as well as bullet proofing your transmission so you can always do 5000 rpm clutchdrops.

Or its the xmission for the STI type R that Subaru made.
--------------------------------------------------------------------------------

Just checking, because I've only heard of STi and STi RA as WRX models.

I of course was referring to the Subaru Impreza WRX STi Type R, but that title requires a ton of typing, so I just shortened it to the Type R. The Type R was an STi variation that was an option first when the STi version III came out in the MY97. In it's first MY it featured 6.7 more ft-lbs of torque, a close ratio Group N style gearbox, which had a mechanical center differential, that allowed the driver to select the torque split. It also featured viscous front and rear LSDs, and was the first turbocharged two door Impreza. The 22b was built off of the STi v.IV Type R.

-Wes