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 Post subject: Slick air pressure
 Post Posted: Mon Jun 01, 2009 9:57 pm 
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Joined: Mon Apr 27, 2009 9:21 am
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I am probably over thinking this but do you run less pressure in a larger slick? Example= I was running the Hoosier 10x29x15 @ 14.5 to 15 lbs. Sixty foots around 1.55. My new tires are Hoosier 11x29x15. The 60fts are worse at 1.58. I was running the same pressure 14.5 to 15 lbs. I dropped to 14 lbs and the sixties seemed to recover. I know there are a lot of variables to contend with I just wondered if there is a rule of thumb on air pressures.

Thanks
Gary


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 Post subject: Re: Slick air pressure
 Post Posted: Mon Jun 01, 2009 10:14 pm 
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Joined: Tue Sep 05, 2006 10:41 pm
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Location: Bronson,MI
my 33.5x17x16 have 5lbs in them ;-)

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 Post subject: Re: Slick air pressure
 Post Posted: Tue Jun 02, 2009 12:13 am 
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Even though those tire sizes are both 29", the new ones are 1/2 " taller according to factory specs. That's not much, but probably where your dropping air pressure would make up for it.

Also my 31 x 14 x 15's I run 8.5-9 lbs normally.

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 Post subject: Re: Slick air pressure
 Post Posted: Tue Jun 02, 2009 6:32 am 
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Joined: Wed Dec 06, 2006 9:24 pm
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Location: Elizabethtown, KY
Mickey thompson tire guys at the track told me when changing brands or size start at last pressure and then .5 lbs increments from there.

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 Post subject: Re: Slick air pressure
 Post Posted: Tue Jun 02, 2009 8:44 am 
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Joined: Mon Apr 27, 2009 9:21 am
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Thanks guys I will keep going a 1/2 lb at a time until the 60's stablize.

Gary


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 Post subject: Re: Slick air pressure
 Post Posted: Tue Jun 02, 2009 9:30 am 
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On my 2400 lb Camaro w/33.5x17x15s I run 9.5 psig cold and they are usually right at 10 psig hot back at the trailer. M/T tires typically like more air pressure than most others. I hear that Toyo tires like lots of air also.

And, the higher you can run them the better as the car will drive better down track. More tire pressure will make the car react quicker at the hit also, which will mess with your reaction times.

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