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Author Topic:   Help me make our car handle better
dode
Dirt Freak

Total posts: 417
posted June 05, 2002 09:04 AM UIN: 13209501
Ok...well, I have some results from last week. Here is our setup:

Wheel | Spring | Scale Weight
LF 1000 926
RF 1100 796
LR 250 970
RR 200 790

Left % 54.5
Rear % 50.5
Cross % 50.7%

Ok...last Friday night the car drove pretty well, but it was pretty loose. I would definitely consider the track very dry and slick. It is a 1/2 mile track. Anyway, I would like to be able to make some adjustments at the track, but at this time we have no weight jacks (illegal), or extra springs, so all we have is about 400 lbs of weight we can move around. What could we do to tighten up the car on a track such as this? Also, I expect the track to be in very good shape this week. We got some rain last night, and generally if the we get some rain early in the week, the track is in very good racing condition by Friday night. I don't think we should change anything until we run hot laps on Friday to see what the track is like, but I would like to know what changes we should make for say our loose condition from last week? What about a push? Are there any good articles to read out there on adjustments? I appreciate all your help guys.

John

merlinmech
Dirt Full Roller

Total posts: 51
posted June 05, 2002 10:12 PM
If the track is dry slick, it is probably going to be a little loose anyway, no matter what you do. That being said, about all you can do with your restrictions is put weight on the left rear. If you can run different size tires, the biggest difference you can make is put a bigger tire on the L.R. I had the same problem 2 years ago and the way I fixed my problem was to get a lighter right foot. Good luck and keep peddling.

dode
Dirt Freak

Total posts: 417
posted June 05, 2002 10:57 PM UIN: 13209501
Hmmm...bigger tire on the left rear huh? Interesting...that I can try...I need to measure to see how much stagger we are getting on the rear. Also, I read that on a dry slick track we want more cross percentage. I understand this. Do you want more or less rear %? Thanks.

John

smayo964
Dirt Forum Racer

Total posts: 90
posted June 07, 2002 07:18 AM
Dode. Like Merlin stated, you can run a bigger tire on the LR. You'll naturally be adding cross weight to help tighten the car. Also, by using offset rims you can easily move you percentages from corner to corner. I kept a 2" offset rim in the rear with 4" offsets on the balance running DOT rubber. When loose, I moved the 2" rim to the LR. When tight, I did the opposite. It's quick easy adjusting. BUT, I didn't run stagger (wasn't req'd). Used air as a fine tune. It's amazing what 2-3lbs of air will do for you if you got it in the right corner of the car. Hope that helps.

dode
Dirt Freak

Total posts: 417
posted June 07, 2002 08:08 AM UIN: 13209501
Ok...did some measuring last night...I think I know a lot of the reason we were so loose. When the driver put the tires back on the car the night before the race, he got two of the tires mixed up, so we had some HORRIBLE stagger going on. We had 4" of stagger across the rear, and 3 across the front. Now we are down to 1" across both the front and the rear. Sheesh...no wonder the thing was all over the place.

Unfortunately, we can't run offset rims, so that doesn't help us, and we have to run IMCA G-60's all the way around. I do understand the air pressure adjustment. We made some adjustments at all 4 corners before the feature, and that did help some. I hope we have a lot of the problem figured out with the stagger though.

John

FLYIN-9
Dirt Roller

Total posts: 6
posted June 07, 2002 05:47 PM
IF YOU CANT USE AN OFFSET WHEEL, INSTALL SOME LONGER WHEEL STUDS & USE WHEEL SPACERS.
YOU CAN BUY OR MAKE SEVERAL DIFFERENT SIZES. EASY TO SWITCH TOO.
F9

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