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Discussion Starter · #1 ·
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
 

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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.



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Jerome said:
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".
 

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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.
 

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Discussion Starter · #6 ·
so, HP, then its not a disc or soemthing going bad
 

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HP said:
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?
 

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V10 MOJO said:
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.
 

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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.
 
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