gti-r attesa awd compared to the gtr?

[MatthewL14]

I was wondering how closely related the awd drive system of the gtr is to that of the gti-r. I was also wondering if anybody knew stock stats for the gti-r 1/4mile and 0-100km. thanks

[Murphy]

I don't know off-hand but if no one else here knows you should be able to find an answer at http://autos.groups.yahoo.com/group/gti-r/ .

I would like a GTi-R for a winter rally car

[Rezz]

As far as I know the GTi-R has a variable viscous torque coupling to the rear wheels and torque is sent to the rear wheels when wheelspin occurs at the front. This is just from memory though... less sophisticated than the GT-R system I'd say. This 'poor mans' ATESSA was used on the Bluebird SSS amonst others.

The GTi-R doesn't have such a good reputation in Japan because it's very nose heavy, a big inherent understeerer even with suspension work. Thats why it didn't do too well in rallying either. Good for a super hatchback though!

[TeeDub]

Interesting. I've been thinking about getting one in a couple years and turning it into an iceracer, but that inherent understeer scares me. I'm going to have to do some more research for sure on this one.

[icydude]

As far as I know the GTi-R has a variable viscous torque coupling to the rear wheels and torque is sent to the rear wheels when wheelspin occurs at the front. This is just from memory though... less sophisticated than the GT-R system I'd say. This 'poor mans' ATESSA was used on the Bluebird SSS amonst others.

The GTi-R doesn't have such a good reputation in Japan because it's very nose heavy, a big inherent understeerer even with suspension work. Thats why it didn't do too well in rallying either. Good for a super hatchback though!

so its a fwd that can send power to the rears....thats messed up

Damien

[Rezz]

As far as I know the GTi-R has a variable viscous torque coupling to the rear wheels and torque is sent to the rear wheels when wheelspin occurs at the front. This is just from memory though... less sophisticated than the GT-R system I'd say. This 'poor mans' ATESSA was used on the Bluebird SSS amonst others.

The GTi-R doesn't have such a good reputation in Japan because it's very nose heavy, a big inherent understeerer even with suspension work. Thats why it didn't do too well in rallying either. Good for a super hatchback though!

so its a fwd that can send power to the rears....thats messed up

Damien

Thats right... any car that has an 'east/west' engine configuration and viscous 4WD will primarily be FWD until it loses traction.

[icydude]

wow i learn more from rezz once again, you know way to much about these cars.....

Damien

[Daemos]

Arn't most '4wd' systems that use a viscous coupling have a constant 50/50 torque split like the USDM Evo 8, WRX etc?

Or are there more than one 'viscous' thing?

I think I'm confusing my self now...

I know viscious limited slips, alow both wheels to freely move, then when there is slippage it'll transfer it to other parts.

But what's the 50/50 visious like in the WRX? Do they allow movement of torque between the front/rear wheels, if so and how much?

[icydude]

wouldn't a 50/50 just be a regular awd. i know the Denali have something like 62% reas and 38% front. but that cannot change so it is awd.

Damien

[Daemos]

wouldn't a 50/50 just be a regular awd. i know the Denali have something like 62% reas and 38% front. but that cannot change so it is awd.

Damien

But what defines 'regular'

Because every company says oh we have AWD, and how do you know what it is? ya know?

Like the one on our CRV it's FWD then it'll kick in the rear.

Some AWD are 50/50, some have a biased towards the rear, some have 50/50 then split up to like 60% to either...

[icydude]

wouldn't a 50/50 just be a regular awd. i know the Denali have something like 62% reas and 38% front. but that cannot change so it is awd.

Damien

But what defines 'regular'

Because every company says oh we have AWD, and how do you know what it is? ya know?

Like the one on our CRV it's FWD then it'll kick in the rear.

Some AWD are 50/50, some have a biased towards the rear, some have 50/50 then split up to like 60% to either...

wouldn't that be the same asa gti-r then?

[Rezz]

Sorry lads, I misled you a bit there...

Pulsar GTi-R is full-time ATTESA-ETS with a viscous center diff... 50/50 torque split to the front and rear. Apparently the WRC car had an electronic torque split adjustment (like the STi Imprezas) but the GTi-R is non-adjustable 50/50.

So the difference between it and the Skyline GT-R ATTESA is: GT-R varies the amount of torque sent to the front wheels according to the amount of wheelspin (hence it can be disabled by pulling a fuse on R32). The GTi-R is constant 50/50 torque split.

[icydude]

so the gti-r could never be changed at all then without going into the drivtrain?

[BigBlueR32]

Sorry lads, I misled you a bit there...

Pulsar GTi-R is full-time ATTESA-ETS with a viscous center diff... 50/50 torque split to the front and rear. Apparently the WRC car had an electronic torque split adjustment (like the STi Imprezas) but the GTi-R is non-adjustable 50/50.

So the difference between it and the Skyline GT-R ATTESA is: GT-R varies the amount of torque sent to the front wheels according to the amount of wheelspin (hence it can be disabled by pulling a fuse on R32). The GTi-R is constant 50/50 torque split.

Just to be sure.. doesn't ETS in ATTESA-ETS stand for electronic torque split.. if so, the Pulsars 4WD is only ATTESA... does that make sense??

[Rezz]

It electronically splits the torque 50/50? This is getting a bit in depth now, so on the weekend I'll do a proper seach and get to the bottom of it.