Visit The Dirt Forum for More Information

Author Topic:   New tire on right front
Steve Dupree
Dirt Freak

Total posts: 316
posted August 08, 2005 07:13 PM  
Ok last week we really exspected to win our feature so we loaded the car up with new tires. I am readiding tires and looking them over and the left front is this. This is a new tire with the tits still on the tire. Well it only wore out the tits on the outside three treads with like 40 laps. So should i increase camber or decrease by the way you read this. We are at 41/2 negative camber on the right front. The track is 5/16 mile 15% banking and we were running a 235/70/15 with 20lbs in the tire. So my thought is the car tried to push a little at times if i was easy entering and if i entered harder then it was spinning out loose and loose off. There should have been a full tire at that angle i would think but you tell me. More air or more camber caster is all ok and toe is at 1/8 out so just wondering. If toe was too far out the middle would be worn and maybe not have got this reading but thats not the case is it camber or preasure and if preasure well then we have to run more stagger in the rear. I guess what i am really asking is that we usually can change car by driving style to make it work ok but i then sence this was a black slick and if we entered easy we were tight till the appex and then throttle loose out. If we entered harder we were loose in and about to spin and great out. Maybe a little help on this. We are running 200 rr and 235 lr. Both tires on the rear were 4off at the time. Our track becomes this way several times a year and want to learn this set up for the car. 2 off on the front 4 on the rear 1200 rf,1100lf, 200rr,235lr. 3475 at the beginning of main with 50% rear weight and 53% left and about 120 left rear bite on the rear. Come on guys i know there are a few than can help this car. It was good enough to win but!!!!!! It could have been better.

Eljojo
Dirt Forum Champ
Total posts: 968
posted August 08, 2005 08:22 PM  
Steve, Wasn't it the dirt track girl who told you about running nearly 40 lbs in the tire? Honest, (I am not being a smart-**** either) I believe that she was steering you in the right direction. I run on street radials and race against guys who run them on beadlocks and 15#s of air. You can see the tires wallowing around under their car and rolling way over onto the sidewall in the corner. Radials are a different animal than bias ply tires. I run my tires at 25 on the right and 20 on the left. When the track blacks over I will drop the rears and raise the fronts 3 to 5 lbs. My car is lighter than yours at 3055 so I would suggest that you bump the right front up to 30-32 lbs. Best of luck my friend and keep on keepin' on! I remember my first win as if it were yesterday! I kept thinking that I was going to wake up and it be all a dream!
Jojo

iowa_dirt_track_girl
Dirt Freak

Total posts: 461
posted August 08, 2005 09:17 PM  
LOL ok steve we will try this one more time

I would leave your set up really close to where you are Now as for going in easy and it pushing that tells me that you are very very close to where you want to be. you could try moveing your left rear wheel OUT and moving your RF wheel IN moving that wheel on the RF in will essentually tight you up from the middle off and by moving the lr out it will get back on the LR quicker.

I still dont know why everyone gives us such a hard time with air pressures ya gratned we are not on your size tires but we are on radials and Iam telling ya 35 pounds sounds like a whole lot but I will garentee ya that almost every fast guy in the midwest has 35lbs in there rf tire and very close to that in there rr tire.


Steve Dupree
Dirt Freak

Total posts: 316
posted August 09, 2005 07:12 AM  
Well i have tried alot of things and guess we will have to try this too. The highest we have ever tried has been say 22 on the right front and 20 on right rear. So guess i will go up a little like to 25 on right front because tire wear dont lie Thanks eljojo and dirt track girl. Thanks dirt track girl i will have to try that when i see it going black slick next time.

JohnG
Dirt Maniac

Total posts: 137
posted August 09, 2005 04:49 PM  
rf in would be like rr out wouldnt it, loosening the car from middle off??

rf out from everything I read tightens your car up???

iowa_dirt_track_girl
Dirt Freak

Total posts: 461
posted August 09, 2005 06:32 PM  
if you think of moving a wheel in or out think of it as leverage if you move closer to the object its harder to pick it up the farther you are away the easier it is to move it
So inother words the closer you get the wheel to the spring it makes it react quicker thus making the spring seam heavier or stiffer.
that is why you move your rear wheels in and out but not to many people think of moving there front wheels in or out

Since he indicated that he was running a 4 inch off on the rr and a 2 on the front a 3 or 4 off on the rf will tighten the whole car up making it harder to roll over on the right side

hope this makes sence to ya

[This message has been edited by iowa_dirt_track_girl (edited August 09, 2005).]

[This message has been edited by iowa_dirt_track_girl (edited August 09, 2005).]

Steve Dupree
Dirt Freak

Total posts: 316
posted August 09, 2005 06:42 PM  
We run 2 off on the front and have played with offsets on the back but because of maybe getting sideswiped we have left the rear alone lately. The car is loose on entry with a hard entry and what ever out to much wheel work to tell. Drive in and let off gas easier and then get on gas at appex car wants to get loose, but it was still really working the cars good just think it could have been alot better. We went from 15th to 5th in like 10 laps so it was better than alot that was running and it was a glass shinny track. Then we got spun and sent to the back

    

Back to the Archives