[ATiM0TEA]

This is pretty much a newbie question. My friend told me that the power only transfers to the front wheels on normal conditions on the STi and his 3000gt VR4 along with all AWD cars, which pretty much makes it a FWD car on normal conditions. I dont think what he is saying is true. I checked out the "FAQ" link on here and it says that the STi have 50/50 power transfered to the front and rear wheels....

[Snax]

I won't go into too much depth here, but your friend needs to do a little more reading before opening his mouth on this matter again. There are many different AWD systems available on past and present cars with varying torque splits from front to rear and different configurations for achieving them.

The STi torque split is 35f/65r and it has a variable lockup limited slip center coupling with a range of 0-100% lockup.

[Yukonart]

I thought our cars were front-biased in auto mode. . . . :-?

[bitabur]

STi is always 35/65 rear biased, even when the diff is locked.

[TL-racer/STi-driver]

When the diff is all the way locked isn't it 50/50. It sure feels and sounds like it.

[4MLA1FN]

so funny how something this fundamental is still a point of confusion to many (including myself, i might add). there have been so many threads on this on various forums. i wish i could find the definitive answer somewhere; from an engineer who'll use the correct terms.

[filbert]

i beleive audis have a front wheel bias, but the STi is biased to the rear as the people above said. The earlier Carerra 4s were 40/60 normally but could move more power to the rear as needed, though I don't know about the newer ones. Also, the G35x awd system i think is actually capable of moving 85% power to the rear... not sure the exact number, but I remember being surprised that they can move a lot more power to the rear than a most awd cars.

[rallybred]

Also, the G35x awd system i think is actually capable of moving 85% power to the rear... not sure the exact number, but I remember being surprised that they can move a lot more power to the rear than a most awd cars.

same with skyline, from 100% rear to 30% front, variable

ours is not, 65r/35f, only amount of lock is adjustable, just like snax said.

[kebs]

It is 35 front/65 rear in auto and if the diff is locked it is 50/50, no bias.

[Rev]

Originally Posted by TL-racer/STi-driver

When the diff is all the way locked isn't it 50/50. It sure feels and sounds like it.

But when you are one notch before locked, it is close but not exactly 50/50 front/rear.

[sin52]

When I go from auto to r.diff trim knob all the way back there is a distinct difference with being able to walk the rear end out under throttle pushing through a turn. --Sin52

[HeyDan]

Originally Posted by filbert

i beleive audis have a front wheel bias

The Audi Torsen ( A4,A6,A8 ) and Haldex(TT) systems are both 50/50.

[Snax]

Originally Posted by kebs

It is 35 front/65 rear in auto and if the diff is locked it is 50/50, no bias.

Well not really. The mechanical split of the center differential determines the basic torque distribution. As you echoed, 35f/65r is correct for an unlocked center limited slip. Locking the limited slip does not however provide a 50/50 split. What it does is eliminate the split entirely, providing 100% of the available torque to both ends of the car. So what you really have is a front and rear torque bias that is concurrently variable from 35-100% and 65-100% respectively.

[filbert]

Originally Posted by rallybred

same with skyline, from 100% rear to 30% front, variable

ours is not, 65r/35f, only amount of lock is adjustable, just like snax said.

well... basically, g35x = skyline

all g35s are skylines in japan... although if you mean US, i guess the g35x is missing the turbo compared to the skyline? or do you mean the last generation of GTRs specifically?

[rallybred]

i was only making observation about ATTESA system in skylines. one of the only awd cars i know of with variable bias, ours does not. i know alot of people have been misled, i even think i read the manual is wrong. our car is 35f/65r permenantly, the dccd is a number of electronic magnet controlled clutch discs that allow us to dial in from 0% lock (open) to 100% lock. we are in effect directly affecting how much torque can be sent to front wheels, but it will never be over 35%, that figure comes from MECHANICAL split and is not controlled by dccd (electromagnetic clutches).

dont take it personally, i initially was wrong too, it was vey confusing at first.