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-   -   traction issues (https://www.racingjunk.com/forums/showthread.php?t=22518)

proclassmonte 12-15-2008 09:23 PM

traction issues
 
when leaving on the nitrous my car wants to chatter the rear tires. its a 3500# car with 28 /9 tires 4.33 gears and a 4500 stall. are there any easy fixes for this.

us7race 12-16-2008 02:23 AM

Air pressure is my first idea, how much do you run? How fast?

proclassmonte 12-16-2008 06:35 AM

air pressure
 
13# runs 10.80s at 122

fla1976 12-16-2008 02:03 PM

chatter
 
You may want to video the car from the side. You may be bottoming out the shocks and unloading the tires. It's easier to see in slow motion.

us7race 12-16-2008 04:54 PM

What suspension are you running? Seems like you are hitting the tires real hard causing the chatter or shake. Have you tried launching at a differant RPM?

proclassmonte 12-16-2008 05:30 PM

rear suspension
 
the lower control arms are stock, with poly bushings. the upper control arms are art morrison adjustables, the springs are stock, and the shocks are three way adjustables set on the firmest setting. and call me crazy, but, it also has a suspension technoligies antisway bar. when it leaves it lifts the front tires about 6 inches off the ground and then it starts to chatter. it never totaly spins them.

mopar1968 12-16-2008 06:53 PM

''fla1976'' i think you are right i had the same problem and that was my problem shocks bottoming out, getting rear 4 link redone.

proclassmonte 12-16-2008 08:31 PM

bottoming shocks
 
the car barely even squats if at all i'm pretty sure it isnt bottoming out. i have pictures of the car launching and it looks almost as if the car actualy raises up a little in the rear.

curtisreed 12-17-2008 04:08 AM

Re: bottoming shocks
 

Originally Posted by proclassmonte
the car barely even squats if at all i'm pretty sure it isnt bottoming out. i have pictures of the car launching and it looks almost as if the car actualy raises up a little in the rear.

If the car is seperating you may still be running out of shock travel on extension.

Curtis

dparker 12-19-2008 05:35 PM

I think your pinion angle is wrong causing it to raise the ass end instead of transfering. Have you ever scaled the car?


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