how much air do you run in your slicks?

[john858]

i have 1432's and i run 9.5lb's

[BEAST477]

That seems like alot. I have 16.5x33s on a 2860lb car and run 6.5 to 7 psi. But every car is different.

[us7race]

2865 Lbs 29.5x10.5 Stiff Sidewall 8-9psi cold..

[I972Nova]

14.5 x 32 good years on 2 cars. 6.5 in my 2650 pound truck and 6.75 pounds in my dads 3150 pound Nova... Only 5 in my 16 x 33's on my dragster... Hope this Helps!

In my experience 9.5 would be way too much. The thing to remember is that every guage is different and you should use the same guage everytime. I have 3 of the Moroso guages that are all the same part number, but all read a little different.

[Tod74]

32 X 14 gOODYEARS STIFF SIDEWALL 3050LB car 8.5 psi

[bjuice]

main thing is heavy car needs stiff side wall..

My motto is keep going up in Air pressure until it loses traction..run as much as you can in other words...why ?

1- car will be more stable.
2- it will be faster.

different tracks/time of season will require different air pressure, you must experiment each time...with a good middle of road starting point


wanna go real fast ?

get a radial slick to work with as much air as possible and you will have a fast tire... 8)

[Rolandjr]

9lbs in 2800lb car w/ 32x14's. Tried 8 lbs but felt unstable.

[bjuice]

ok then try 9.25 if it works go to 9.5 if it still hooks go to 9.75 and so on...like i said more air you can run faster and stabler it will be..

the main thing about air pressure is don't make huge jumps ..if you have a digital gauge you can sneek up on it a little slower..but a regular gauge 1/4 lb at a time.. :wink:

[Rolandjr]

ok then try 9.25 if it works go to 9.5 if it still hooks go to 9.75 and so on...like i said more air you can run faster and stabler it will be..

the main thing about air pressure is don't make huge jumps ..if you have a digital gauge you can sneek up on it a little slower..but a regular gauge 1/4 lb at a time.. :wink:The 9lbs works great. Leaves hard everytime with the wheels in the air. Never tried 9.25 but 9.5 spun. 8)

[dynaguy03]

I run 8.5 -9.0 14.5 x 32 with tubes. I tried 7-7.5 but in photo's i noticed the tire was..for lack of a better term "folding over itself". Although hooked hard. With 8.5 i still see a little too much "folding". My car is an S10 weighing in at 2910 lbs.
Im going to put a smaller tire on it this winter tho.

[bjuice]

I run 8.5 -9.0 14.5 x 32 with tubes. I tried 7-7.5 but in photo's i noticed the tire was..for lack of a better term "folding over itself". Although hooked hard. With 8.5 i still see a little too much "folding". My car is an S10 weighing in at 2910 lbs.
Im going to put a smaller tire on it this winter tho.

why ya going with a smaller tire ?..just curious

[nofear57]

sbc 434 700hp, glide, 5,000 stall, 4-link, 1650lb altered, 14x32, 5 to 5.5 psi

bbc 555 900hp, glide, 4,500 stall(but needs6,000), ladder bar, 2800lb 56'Chevy 14x32, 9psi

[Racefab57]

Keep checking 60 foot times with different pressures! D.R.

[drjay0]

I may not be up to the stats of the last few posts but I have 28 x 10 Et Drags with tubes on my 3400 Pound Dart Swinger. Runs 11.30's. I am up to 16 1/2 psi during the last test runs in October and got the best 60ft and best MPH.

[dparker]

My wife gets mad but I do little burnouts in my shop(facing out the door just in case) but it lets me see my contact patch on the cement. If its real dark on the edges of the black marks I know I don't have enough air and so on. It just helps me get close before I go to the track. When we go to Ennis we usually have to ad 1/2 to 1 psi to eliminate the tire squaring up. Each track may take a little different psi also.

[cepx111]

My wife gets mad but I do little burnouts in my shop(facing out the door just in case) but it lets me see my contact patch on the cement. If its real dark on the edges of the black marks I know I don't have enough air and so on. It just helps me get close before I go to the track. When we go to Ennis we usually have to ad 1/2 to 1 psi to eliminate the tire squaring up. Each track may take a little different psi also.
ditto on that last statement, that way you have the most contact or tire on the track which is a very good starting point.
I also agree with Bj, play with the pressure going higher and higher in small increments till its loses traction and then back off to where it got the most bite, personally my 14x32's likes anywhere between 7 to 8.5, only time I run more than that I'm trailoring the car.
Goodluck, Cp

[ImBack]

14-32 MT's,8.5 # in 2800 # Malibu,7.5 in 14.5-32 Goodyears on same car.

[chevyfireball]

I run 34.5 x 17 x 16 Hoosier Slicks. Usually run between 5 - 6 lbs depending on the track.

[timothysiler]

I run 5 3/4lb-6lb psi. Depending on how much my car bites I will adjust Tire pressure. If it has to much bite or hooking to hard I will lower the Air Pressure or Wheelie Bars. If I am spinning I will raise the air pressure or wheelie bars to get some bite back in the car. 2450lb Monte Carlo running 4.70s-5.30 classes. 16x16x33.5 beadlocks M/T This will be my last set of M/t I ever own though. Going back to my goodyears. If my car feels unstable, normally its a shock adjustment and not the Tires being to low.

[camarotale]

I tried the cement burn out, it does not work..... Here is how you do it.. You race and look at the tire, when the rubber starts to roll over the edges you are under inflated, so you play with it until you are at the point where it is edge to edge with out a noticible roll over at the edge

[timothysiler]

I would just adjust air pressure in 1/4 increments until your 60' is the best and most consistant. On my car I induce a little bit of wheelspin so the car doesn't dead hook.

[ashbros]

2486 lb car 15x16 5 to 5.5 lbs air pressure.

Every car/chassis will be different. You'll need to spend a little time at the track during day and evening conditions so you can determine how your car reacts to the differing track temps and humidities. A lot of times during the day the track will be hot with very little humidity, where during night racing the track may be cooler and the humidity levels are creating track surface moisture.

I would start out around 8-9 lbs of tire pressure and work your way down with the tire pressure.

Make sure you complete each run so you can get a feel of the car and the way it handles on the tall end of the track.

Have someone video the run at the end of the track and narate whats happening including commenting on the amount of tire pressure during each run. Look to see if that car is squatting down and grabbing the track or if the rear end is rising up due to lack of traction, causing the backend of the car to dance around...

[ssym]

Adding another side to the question... Do you check the pressure cold? What about during test and tune when you can make close to back to back runs? Mine seem to go up about 1 pound or a pound and a half after a run, should I leave it there (9 psi), or bring it back down to 8 psi when they are warm?

Thanks, Steve

[oneowner73]

I run at 2600 lbs. with a 14.5Wx32 Hoosiers. I ran this past Saturday at a test and tune. Started the first pass with 11.0 and 11.25 after that. Never spun at all. Had best 60 ft ever. Ran 9.78 @ 133.84

[john858]

Adding another side to the question... Do you check the pressure cold? What about during test and tune when you can make close to back to back runs? Mine seem to go up about 1 pound or a pound and a half after a run, should I leave it there (9 psi), or bring it back down to 8 psi when they are warm?

Thanks, Steve

i check mine every round and put them back down 10.5 on 14x32 radials