[V10 MOJO]

Ive noticed that occasionally when doing burnouts at the dragstrip, my left rear tire does not spin initially, it starts up after the right has been going for a while. this does not happen all the time. there are no other perceivable problems, noises, etc.

any ideas

 

[Mister Bone]

Snake Bitten had posted a video, of I forget who, doing burnouts on their old tires.The same thing happened, left wheel is "late" to spin.

I posed the question "What is wrong with this picture" and no one said a word. So either it is normal or I am the only one to see this.

I think it is a sign of a limited slip going bad. But then I am not sure of the % of lock-up in the Viper diff.

 

[Matt]

I think it is a sign of a limited slip going bad. But then I am not sure of the % of lock-up in the Viper diff.

I'd have to agree with Jerome. I didn't see the video he spoke of, but when I'm at the track and I see cars start a one legger burnout and then the second begins to spin I think "dieing posi".

 

[Toby]

Try a fluid change first..see if that helps.

 

[HP]

It's the classic problem of right tire lifting due to diff torque twist -
The left tire is compressed and the right tire tries to climb up the fenderwell. Some drag racers will put a little more spring compression
on the right rear. The posi unit in the diff will - for the most part -
counter the difference in traction.

 

[V10 MOJO]

so, HP, then its not a disc or soemthing going bad

 

[2BADD 4U]

HP...Good answer.

Dave

 

[Toby]

It's the classic problem of right tire lifting due to diff torque twist -
The left tire is compressed and the right tire tries to climb up the fenderwell. Some drag racers will put a little more spring compression
on the right rear. The posi unit in the diff will - for the most part -
counter the difference in traction.

I could see this with big sticky slicks but not street rubber.

What kind of tires are you running?

 

[HP]

so, HP, then its not a disc or soemthing going bad

Posi trac or any of the clutch/friction devices - aren't meant to totally
control the rear tires, you will have some unequal spin -especially when
the load is unbalanced- as in a hard launch.
I think what your seeing is normal - but there could be a point where the
clutch pack wears beyond what is acceptable. A stiffer suspension in
the rear might help or some extra weight on the rear right side.

 

[HP]

You might want to try disconnecting the front sway bar next time, to
see if it allows the front of the car to absorb some of the rotational
twist.