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Thread: how much air pressure

  1. #1
    Senior Member SENIOR BUILDER
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    how much air pressure

    how much air pressure do you guy's run,its a 77 vega wagon,weigh 2600,tire size 29/12/15's,i ran last friday and put 9-1/2 pounds and i thought i spun so did my friend watching,didn't hook good,maybe around 8?,,,thanks steve

  2. #2
    I run 9 1/2 in my 83 cutlass. It plants pretty hard. I don't see myself ever going lower than 9. Are your tires getting warmed up in the box? What kind of compound are you running?

  3. #3
    Senior Member MASTER BUILDER
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    If you can, Video tape the rear tires. Then play it back frame by frame to get the best results. I know from experience that it helps a ton. When we changed tire mfg's If was able to run way more air.

  4. #4
    Senior Member EXPERT BUILDER
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    If they are slicks (not DOT's) I think I'd start at 8psi go up 1/2 pound each pass until you get the best 60' But you will need to keep the Launch RPM. I run 9psi most of the time but on a slick track 8.5 works better..

  5. #5
    Senior Member SENIOR BUILDER
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    thanks,,there hoosiers do6 slicks,,,steve

  6. #6
    Senior Member EXPERT BUILDER
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    you guys might think i'm crazy buy i run 10.3/4's in my 1432's , i talked to some tire guys & was told to run as much as possible.if the tire balls up when you leave you don't have enough air.add air until it doesn't ball up & then add 1/2lb until you lose 60' then back it down a 1/2lb.jmo.good luck

  7. #7
    Senior Member SENIOR BUILDER
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    a guy took a picture of my tire when i left the line,my tire did not wringle at all,thats the reason i thought i had to much air in the tire,i dunno,,,steve

  8. #8
    Senior Member MASTER BUILDER
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    i dont see alot of wrinckle in that s 10 standing on its ass
    HOLY SH@* WHATS BROKE NOW

  9. #9
    Senior Member EXPERT BUILDER
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    then i try the 8lb's go up from there if needed,good luck

  10. #10
    Senior Member SENIOR BUILDER
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    i ran 9.5 in the tires and pulled the front about 14" my friend said,so that might be about right,,thanks steve


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