My car has a Kaaz 1.5 way LSD, Exedy street clutch, Fidanza flywheel, ITR/B16A 1-5th gears and a JDM FD.

I was driving around my neighborhood today and noticed that when I floored the gas in 2nd gear, the car seems to want to swing left-right on the front end.

Bear in mind that I'm using 205/50 Falken Azenis all around and that I have my lignment set to zero toe in the front.

Why do I have torque steer? Is my LSD going out on me? or do I just have too much power?

 

Check tire presure.

 

Ditto. I would of said that.

 

I already ckecked my tire pressures and set it to 36 PSI on both sides.

 

What does the car do under hard braking?

 

Torque steer is due to the unequal left and right halfshaft lengths. The torsional displacement is larger on the longer shaft so even tho the LSD is functioning properly and making both shafts spin at the same rate, the further ends of the shafts (the wheels & tires) are gonna spin at a slightly different rate, thus the car would pull slightly to one side.

This is inherent in FF cars and it's not a problem of your LSD.

[edit]Correction: Others have pointed out that ITR has equal length half shafts..... sorry about the confusion.


[Modified by Wai, 9:09 AM 12/13/2002]

 

I'm not sure but for the most part it just stops fine, but I have noticed someinstances when I brake hard and the car wants to swerve left right as well...
I know that my pass side upper control arm ball joint is loose...maybe that could be a contributing factor?

 

Umm the ITR has equal length halfshafts with an intermidiate shaft specifically to reduce or eliminate torque steer. My guess is that the kazz is a clutch type diff and it my be not functioning properly as is should lock up pretty good under hard strait lin accel which is there strong point over a helical or gear type like the quialf(sp). It could also be nothing are you sure its not just wheel hop under hard accel, don't know you whp and 2nd gear whl hop is a possidlity. But lastly the kazz is needs lots of looking after and frequent lube changes and limited life span how old is you diff and when was the last lube service, and remember it uses its own special lube not the normal stuff. Hope I could have been of any help (edit)Oh missed the part about the balljoint yeah that can definately cause torque steer any loose susp components under hard accel or braking in a FWD car will cause all kinds of headaches.


[Modified by integratom, 8:25 PM 12/12/2002]

 

It doesn't HAVE to be any of that either. What was the surface of the street like?

On a perfectly smooth racetrack my car has zero torque steer.

On a wavy rutted highway I can barely keep control of the car.

Why some of you guys think that LSD's or equal length half shafts are going to prevent your stupid cars, that drive thru the wheels that you turn with and that have a scrub radius, from following surface irregularities is just amazing.

Ah, yes, you read in road tests or literature that "the trick diff kills torque steer". That's just bs.

The ITR has a massive intermediate shaft on the long side. The half shafts themselves are equal length. Unequal windup is not the problem in this case.

Yep, it's inherent in FF cars. I laugh at how many times I read that VW had cured the torque steer in the Golf/Jetta. The last VR6 I drove was absolutely Horrid.

Scott, who reminds you that the ITR is a car that's great in spite of itself....

 

I'm guessing from his screen name that he has a GSR. Do GSR's have equal lenght halfshafts?

 

i have lotso torque steer with my itr lsd and 170~whp in a gsr

it is just part of the poo roads

 

I sometimes notice torque steer on my GSR with the Quiafe but its rare.

 

 

Nah, its completely different....sorry, just kidding, but yes, the GSR and ITR share the same drivetrain layout.

 

Could just be poor roads then. Or tire pressure, maybe even alignment...

 

Torque steer is caused by the fact that the the force applied on the tire does not go through the steering pivot point. Scrub radius is what they call it, RR98ITR?

But yeah, I'm not even sure how equal length halfshafts and lsds accomplish a reduction in torque steer. Whatever they do, it cannot be eliminated unless the force on/ by the tire goes through the steering pivot point.

 

I don't think LSD does, but I'm almost sure that unequal length halfshafts WOULD contribute to torque steer. I've heard and read about it from quite a few different resources. It's about radius and length ratio being not the same (something along the line with what wai said.)