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Author Topic:   need help
shilop
Dirt Roller

Total posts: 9
posted August 14, 2002 11:43 PM
Ok..here is my problem. I have an imca hobby stock. My car some nights will be almost perfect, I go to the same track, same setup and the track looks the same, and then I can't go anywhere but back. Is my car setup right please please help.
1/2-3/8 mile..i run both
lf 18 rf 28
lr 18 rr 26
lf 1000
lr 250
rf 1100
rr 200
Run bilstein shocks.

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Dunbar
Dirt Maniac

Total posts: 119
posted August 15, 2002 01:00 AM
Well I dont like your air pressures at all I also run a half mile track. My left side pressures are 16 and right side 18. I always run the same pressure week after week sometimes i'll drop the left rear to 14 but thats a once in the blue moon thing.My springs are LF 1000 LR 250 RF 1200 RR 200.. I dont think I've helped you much but lower your air pressure and e-mail me at joe_dunbar2000@yahoo.com and tell me what happens.

uforacing51
Dirt Freak

Total posts: 349
posted August 16, 2002 08:20 PM
What about the offset on your rims? They are measured by putting the rim (without tire) with outside facing up and measure from the hole in the center to the ground. You should be running offsets of about 2 inches on LF, RF, and RR. You can use a 4 inch offset on the LR. These can be changed to 4 inch in the back if the track is soupy. Your springs are identical to mine and the shocks should be racing shocks, probably 94's on rears and 95's on front or splits on the RF and LR. I use Pro shocks, they are good shocks and are not that expensive for this class. That should help you some. I realize its close to the end of the season, but get some of this stuff and try it, the info may help next year.
PS. what are you running for tires? I use street tires and run them at: RF-18, RR-16, LR-15, LF-13. I use tubes on the right side, I pulled 2 tubless tires off the RR last week cause I didn't have tubes in them (too many repairs)

[This message has been edited by uforacing51 (edited August 16, 2002).]

racer17j
Dirt Forum Champ
Total posts: 1565
posted August 16, 2002 10:31 PM UIN: 54865418
51 he can only run bilstein or stock shocks in imca.i agree that it seems like alot of air pressure on the right side i never go above 25 on my rf and 22 the rest of the way around.also might want to go to a softer spring on the lf i run 1150 and 925 on the front of mine. all tho the track looks the same it might very well not be.unless it's so slick that the cars can see the reflection on the track or it's a dust bowl it's hard to tell some times just what your dealing with i know myself we run right after the late models and the track changes alott in just the races they run so that the set up we have in is not always the best don't feal bad we all have nite that if feals like we have a loaded semi trailer on the back and she just won't go anywhere.nite like that i just like to try to be smooth and waitr for everybody to mess up or fall out

shilop
Dirt Roller

Total posts: 9
posted August 17, 2002 04:39 AM
Ok, we tried to lower the air pressures in the tires, and on the white flag lap we roller off a right rear tire. I lowered the right rear to 20lbs. But i didn't have a tube in, tonight, i am going to try 18 with a tube. Thank you all for the imput, and please if you think of some more please write.
Thanks

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BK19
Dirt Freak

Total posts: 285
posted August 17, 2002 02:52 PM UIN: 40696038
what is the car doing when it isnt working push,loose ?????

racer17j
Dirt Forum Champ
Total posts: 1565
posted August 18, 2002 12:37 AM UIN: 54865418
personally i will never run any tire without a tube in it except for maybe the lf if i absolutly had too

ford5
Dirt Freak

Total posts: 298
posted August 18, 2002 08:30 AM
drill small holes in the rim near the bead and thread small self tapping sheet metal screws right into the tire bead and then they will notroll off the rim anymore, then if that is illegal at your track, hide the ***** heads with a bead of silicone and paint over it, it works i've seen it LOL-FORD5

merlinmech
Dirt Full Roller

Total posts: 51
posted August 18, 2002 10:49 AM
Running street tires at 18 psi. on the right side, you will be running on the sidewall. There are very few 2 ply sides on 205's. I welded a bead on my wheels (probably not very safe) and still run the right side at 26 psi. Check tire temps. to get them even. With those skinny tires, when it STARTS to get slick, take the weight out of the right foot. Not trying to offend here, but usually when someone is inconsitant from night to night they're driving too hard. Good luck.

BK19
Dirt Freak

Total posts: 285
posted August 18, 2002 01:06 PM UIN: 40696038
i normally run 23 across the back with tubes and 18 on the left front and 28 on the right front with tubes 205/75/15

shilop
Dirt Roller

Total posts: 9
posted August 18, 2002 03:41 PM
Just wanted ya too know i put a tube in the rr and ran in at 18 and would of won my heat race if my motor would of had just a lil more "go". Car handled awesome. Thank you all very much for the info. Please keep it coming if you have more.

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