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Author Topic:   Lowest air pressures?
Racer8c
Member
posted April 21, 2003 08:09 PM
What is the lowest air pressures I can run in tires with tubes, but no bead locks? High banked dirt track.


racer17j
Member
posted April 21, 2003 11:30 PM
what kind of tires on street tires i wouldn't go much under 18


c21
Member
posted April 22, 2003 10:18 AM
Hey c21,
Just checking your numbers, are they with or without tubes.


iowa_dirt_track_girl
Member
posted April 22, 2003 01:37 PM
What kind of tires do you run?
If they are a 7 inch dot tire like a 205 70 15 or 205 75 15 or 14 for that matter
we never run less then 35 on the right side on both front and rear and the left side is 23 lf and 25 lr that is with a 3000 lb car


Rookieracer76
Member
posted April 22, 2003 02:15 PM
Maybe im crazy or just really lucky but i go RF 28 RR 24 LR 20 LF 16. Thats a 215/65/15 with no tubes or beadlocks! On a 5/8 mile mid banked track.


c21
Member
posted April 22, 2003 02:23 PM
Track and driving style has a lot to do with it also the car and how much it weighs.On a short 1/4 mile tacky track where you really got to hang the back end out to turn the car will be different than a 1/2 mile where you can drive around the corners.Just my 2cents....towman


Racer8c
Member
posted April 22, 2003 06:59 PM
The tires are Winston Winners, 255/70/15, half mile track, without beadlocks, car weighs heavy at 3800, need to gut the front some more. I ran Saturday night with fr 20 rr 18 fl 17 rl 17 with no problems on rough track with all the rain the late models tore it up pretty good, was wondering if I could go any lower, say....15?


racer17j
Member
posted April 22, 2003 10:23 PM
why are you wanting to run lower how did the car handle?


Racer8c
Member
posted April 23, 2003 10:19 PM
It didn't want to turn from the center off, I was told by a friend of mine that has won several races to run fr 20 fl 12 rr 14 rl 10, but I don't run bead locks, and that seams really low and was wondering if I could get away with 15. It could have been me not running the right line though, this was my first race, I also ran with a front sway bar, which I took off today. I run with welded spiders in the rearend too, not sure if that might have caused some of the push either, need to start eliminating possible problems, but was wondering on the air pressures.


racer17j
Member
posted April 24, 2003 12:52 AM
what works on his car might not work on yours best way to tell is put it on scales you would be amazed what a couple # of air will do to your %'s. myself i would try some more stagger in the rear


c21
Member
posted April 24, 2003 10:09 AM
I've had it scaled already and these are the percentages.......left=51.3%, rear=49.7%, cross= 52.7%, that was before I added about 30 pounds in the rear so everything is probably slightly higher now


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