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Street Radial PSI

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Old Jul 22, 2008 | 08:30 PM
  #1  
joeblue83's Avatar
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From: Southern Wisconsin
Car: 1988 Camaro
Engine: 383 Stroker
Transmission: Probuilt 700 R4
Axle/Gears: 3.73
Street Radial PSI

I know that I should adjust at the track, but what would be the ideal psi for running a set of mt street radials 255 50 16's. I started at 20 and worked down to 13. At 15 psi I ran a 1.76 60 foot and a 12.53, When I went down to 13 psi I ran a 1.75 with a 12.7. WTF?
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Old Jul 23, 2008 | 09:07 AM
  #2  
Gunner823's Avatar
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From: Dayton, Ohio
Car: 1988 Trans Am
Engine: L98 355
Transmission: 700R4
Axle/Gears: 3.70
Re: Street Radial PSI

What was your mph if I can ask?

As for why you slowed down with a better 60ft, lots of things could be a factor, heat soak, air temp etc. but assuming nothing else changed, you could have reached the point where the lower PSI starts to add enough contact patch that the friction slows the car down a hair.
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Old Jul 23, 2008 | 02:16 PM
  #3  
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From: Bealeton, Virginia, 22712,USA
Car: 92 L98 Z28 Heritage Hard Top
Engine: L98 350 w/ HSR,24lbs inj,AFPR
Transmission: TCI Super Street Fighter W/3300 sta
Axle/Gears: 3.73 Detriot NoSpin,LPW cover
Re: Street Radial PSI

the lower PSI starts to add enough contact patch that the friction slows the car down a hair. What he said........
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Old Jul 23, 2008 | 05:31 PM
  #4  
joeblue83's Avatar
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From: Southern Wisconsin
Car: 1988 Camaro
Engine: 383 Stroker
Transmission: Probuilt 700 R4
Axle/Gears: 3.73
Re: Street Radial PSI

110
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