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tire psi?

This is a discussion on tire psi? within the Drag Racing forums, part of the Racing Forums category; going to drag my car for the first time on friday, my question is with stock tires what do you ...

  1. #1
    I need some money huggerls1's Avatar
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    hugger orange
    1999 camaro ss

    tire psi?

    going to drag my car for the first time on friday, my question is with stock tires what do you guys have your psi at? i was planning on putting them at 25 but if anyone has some info they can pass down i would appreciate it

  2. #2
    I need some money huggerls1's Avatar
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    hugger orange
    1999 camaro ss

    ok i guess im going with 25psi

  3. #3
    Member Z28collection's Avatar
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    black silver
    99 z28, 81 z28

    psi

    i run a little under 20 on a drag radial and it hooks good enough to break stuff thats my .02.

  4. #4
    Member mr_r0bert0's Avatar
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    pewter
    2002 camaro z28

    usually i run about 20-22 psi when i go to the track or if i am running my friends

  5. #5
    BLKHWK Durango's Avatar
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    Black
    BLK TA modded 12.2@113mph

    Ok I don't want to steel the thread but what psi on regular days not running the track

  6. #6
    Member mr_r0bert0's Avatar
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    pewter
    2002 camaro z28

    usually like 32

  7. #7
    formally 01 T/A 0verkill's Avatar
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    "Arrest Me Red"
    2001 trans am

    i run 42 on the street and 25 at the track with my street tires

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    Member 346ci's Avatar
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    NBM
    1998 Z-28

    I run 35psi all the time on street tires

  9. #9
    Nitrous Tuner LS2Tuner's Avatar
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    Your best beat is to go to nice concrete parking lot with a accurate tire gauge, a jug of water, & a airtank. I would start at 26psi and go down in 2lbs increments. I have not found a regular street tire regardless of the size that wanted under 22.

    Anyways make 2 small puddles to pull up into just to clean the tires off a little. That means roll into the water spots and power brake the car up just a second or two. Now roll further forward. Again power brake the car up for 3-5 seconds and stay on the throttle so it continues to spin. . . . . . Walk it out about 2-3 feet. Now get out and look at the marks.

    What your looking for is a good even coloring across the tread. Which in turn equals the most tread contact on the track. If it's light on the edges than continue to go down. If it's darker on the edges and lighter in the middle than you need to increase the psi.
    Remember also you need to wait a couple min. for the tires to cool before adjusting the psi again or your #'s won't be accurate.

    The biggest advantage you can give yourself while still running a regular street tire is to install some junkyard V-6 springs in the rear so you can at least get some weight transfer.

    And for the LOVE OF GOD FOR THOSE THAT DON'T KNOW ALREADY. . . . . .
    If your at the track with a regular street tire drive around the water box. And NO smoky burnout!! Street tires hate heat.
    Back up and stop before the water box and just clean the tires off and warm them. A light haze is all thats needed.



    Don't be afraid of the bottle!!! Be afraid of your tune!!!

  10. #10
    Member fergyflyer's Avatar
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    2002 Z28

    Quote Originally Posted by LS2Tuner View Post
    Your best beat is to go to nice concrete parking lot with a accurate tire gauge, a jug of water, & a airtank. I would start at 26psi and go down in 2lbs increments. I have not found a regular street tire regardless of the size that wanted under 22.

    Anyways make 2 small puddles to pull up into just to clean the tires off a little. That means roll into the water spots and power brake the car up just a second or two. Now roll further forward. Again power brake the car up for 3-5 seconds and stay on the throttle so it continues to spin. . . . . . Walk it out about 2-3 feet. Now get out and look at the marks.

    What your looking for is a good even coloring across the tread. Which in turn equals the most tread contact on the track. If it's light on the edges than continue to go down. If it's darker on the edges and lighter in the middle than you need to increase the psi.
    Remember also you need to wait a couple min. for the tires to cool before adjusting the psi again or your #'s won't be accurate.

    The biggest advantage you can give yourself while still running a regular street tire is to install some junkyard V-6 springs in the rear so you can at least get some weight transfer.

    And for the LOVE OF GOD FOR THOSE THAT DON'T KNOW ALREADY. . . . . .
    If your at the track with a regular street tire drive around the water box. And NO smoky burnout!! Street tires hate heat.
    Back up and stop before the water box and just clean the tires off and warm them. A light haze is all thats needed.





    Exactly right.

    All you need to do is spin the tires for a half second or less if they are street tires. You basically want to clean off the dirt and debris stuck to the tire and scuff the tire surface. The more you spin the more the tires glaze and become slick.

    I've never had much luck below 24 on street tire and 26 seems to be the sweet spot for my driving style.

  11. #11
    Nitrous Tuner LS2Tuner's Avatar
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    Quote Originally Posted by fergyflyer View Post
    Exactly right.

    All you need to do is spin the tires for a half second or less if they are street tires. You basically want to clean off the dirt and debris stuck to the tire and scuff the tire surface. The more you spin the more the tires glaze and become slick.

    I've never had much luck below 24 on street tire and 26 seems to be the sweet spot for my driving style.
    The PSI will vary due to size and brand not your driving style.

  12. #12
    formally 01 T/A 0verkill's Avatar
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    "Arrest Me Red"
    2001 trans am

    Quote Originally Posted by LS2Tuner View Post
    The PSI will vary due to size and brand not your driving style.
    what he said.

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