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gxp callin me out...

This is a discussion on gxp callin me out... within the Drag Racing forums, part of the Racing Forums category; Or someones way of additional weight to hook...

  1. #41
    Junior Member BIG HOUSE's Avatar
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    Or someones way of additional weight to hook

  2. #42
    I don't sell out! blackSS01's Avatar
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    Quote Originally Posted by TLS_Addict View Post
    1 Gallon = 128 ounces
    1 Pound = 16 ounces

    128 / 16 = 8

    Unless my math is wrong.....or if you get the gas in the early morning it could be more dense! lol
    From my understanding Gas weighs less then water. Your math is right but liquid weight and dry weight are measured differently
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  3. #43
    Moderator 35th-ANV-SS's Avatar
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    1/8 tank when racing at the track? I assume you bring your own gas then.

  4. #44
    I don't sell out! blackSS01's Avatar
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    Quote Originally Posted by 35th-ANV-SS View Post
    1/8 tank when racing at the track? I assume you bring your own gas then.
    Gas station is about 5 miles from the track. Little do people know (I found out by accident) but our gas gauges will go about a centimeter below E before its truely empty. Try not to run it that low because its hard on the fuel pump but it has happened so I don't sweat it

  5. #45
    Moderator 35th-ANV-SS's Avatar
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    I'm thinking I can go through an 1/8 tank in a couple passes...

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    Quote Originally Posted by blackSS01 View Post
    From my understanding Gas weighs less then water. Your math is right but liquid weight and dry weight are measured differently
    Actually liquid weight and dry weight are measured the same way. The math is right but it's based on volume so the ounce to pound conversion won't work. You are correct gas weighs around 6.1 lbs per gallon.

  7. #47
    Moderator Firebirdjones's Avatar
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    Quote Originally Posted by blackSS01 View Post
    I was serious

    Why have shit sitting in your car that you don't need while you race

    I always take out everything and stay low on gas
    I do the exact opposite when running stock street tires. Helps to hook and transfer weight. Full tank, and generally I'll even run a good sized cooler in the back packed with ice and drinks. Helps me cut 1.90 60 foot times with 40 psi in the rear tires

    Taking weight out of the rear of the car on stock rubber isn't a great idea.

  8. #48
    Moderator Firebirdjones's Avatar
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    Quote Originally Posted by BIG HOUSE View Post
    Or someones way of additional weight to hook
    Exactly. I learned that stuff early on pure stock racing on little F70-14 bias plys. More weight in the trunk....

  9. #49
    Moderator Firebirdjones's Avatar
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    Quote Originally Posted by 35th-ANV-SS View Post
    I'm thinking I can go through an 1/8 tank in a couple passes...
    1/8th tank = bad idea

    The last thing you want to do is slosh that fuel around at the starting line and uncover the pickup.

  10. #50
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    I would never run my car low on fuel. Especially when going wot. Guess I'm just weird.

  11. #51
    I don't sell out! blackSS01's Avatar
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    Quote Originally Posted by Firebirdjones View Post
    I do the exact opposite when running stock street tires. Helps to hook and transfer weight. Full tank, and generally I'll even run a good sized cooler in the back packed with ice and drinks. Helps me cut 1.90 60 foot times with 40 psi in the rear tires

    Taking weight out of the rear of the car on stock rubber isn't a great idea.
    40 psi is fairly high for street tires IMHO

    You would know more then me about the racing since you probably have much more time at the track then I do. I have a couple hundred passes lifetime

    I know I cut my one of my best 60' with 28lbs in my street tires

    I know the launch is key but a full tank is a lot of weight to get moving once you get off the line. I'll try anything once though

  12. #52
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    Quote Originally Posted by Firebirdjones View Post
    1/8th tank = bad idea

    The last thing you want to do is slosh that fuel around at the starting line and uncover the pickup.
    I didn't say I would ever do that...Someone else in this thread did

  13. #53
    I don't sell out! blackSS01's Avatar
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    Quote Originally Posted by 35th-ANV-SS View Post
    I didn't say I would ever do that...Someone else in this thread did
    Never had an issue before

  14. #54
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    Quote Originally Posted by blackSS01 View Post
    40 psi is fairly high for street tires IMHO

    You would know more then me about the racing since you probably have much more time at the track then I do. I have a couple hundred passes lifetime

    I know I cut my one of my best 60' with 28lbs in my street tires

    I know the launch is key but a full tank is a lot of weight to get moving once you get off the line. I'll try anything once though
    It's something you'll have to play with. But I think you'll find the extra weight is more benificial in your 60 foot times, and far outweighs any penalties of hauling it down the track,,,to an extent. You'll have to sneak up on it. Start with a full tank and go from there. That's about 95 lbs. give or take.

    I've found that stock rubber likes higher air pressures. Lower pressures tend to cup the middle of the tire, less contact,,,especially on these wider radial tires. You can experiment by leaving short marks on clean pavement. Look closely at how even the mark is accross the entire contact patch.
    Light in the center means it needs more air pressure. When it's even,,,it's a good starting point for the track when you get there. I found 40 psi to work exceptionally well on the 275/40-17's. Even the old bias plys I use like alot of air as well. From there it's all weight bias and sneaky suspension tricks. We weren't allowed any obvious weight bias, so we would put water in the spare tire. Sometimes even a larger spare tire than what the car was actually running to hold more water, or run the spare with a 7" rim instead of the 6" rims on the car, again more room for water. That's about as far as I ever went with weight bias in the stock class. Got me a best of 1.87 60 foot times on F70-14 bias plys
    But when running a 4th gen on test and tune, no rules apply. I'd have all kinds of crap in the trunk for weight bias, my laptop for tuning, the cooler packed with drinks, even had a bag of stuff from the store after shopping earlier that day. I've never had the spare out of the car either. Mainly also because I'd drive the cars to the track, and I didn't want my junk laying in the pits, probably wouldn't be there when I got back.

    Sticky tires are a completely different ballgame however.

  15. #55
    I don't sell out! blackSS01's Avatar
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    Quote Originally Posted by Firebirdjones View Post
    It's something you'll have to play with. But I think you'll find the extra weight is more benificial in your 60 foot times, and far outweighs any penalties of hauling it down the track,,,to an extent. You'll have to sneak up on it. Start with a full tank and go from there. That's about 95 lbs. give or rake.

    I've found that stock rubber likes higher air pressures. Lower pressures tend to cup the middle of the tire, less contact,,,especially on these wider radial tires. You can experiment by leaving short marks on clean pavement. Look closely at how even the mark is accross the entire contact patch.
    Light in the center means it needs more air pressure. When it's even,,,it's a good starting point for the track when you get there. I found 40 psi to work exceptionally well on the 275/40-17's. Even the old bias plys I use like alot of air as well. From there it's all weight bias and sneaky suspension tricks. We weren't allowed any obvious weight bias, so we would put water in the spare tire. Sometimes even a larger spare tire than what the car was actually running to hold more water, or run the spare with a 7" rim instead of the 6" rims on the car, again more room for water. That's about as far as I ever went with weight bias in the stock class. Got me a best of 1.87 60 foot times on F70-14 bias plys
    But when running a 4th gen on test and tune, no rules apply. I'd have all kinds of crap in the trunk for weight bias, my laptop for tuning, the cooler packed with drinks, even had a bah of stuff from the store after shopping earlier that day. I've never had the spare out of the car either. Mainly also because I'd drive the cars to the track, and I didn't want my junk laying in the pits, probably wouldn't be there when I got back.

    Sticky tires are a completely different ballgame however.
    Good info

  16. #56
    Senior Member Z28Thunder's Avatar
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    Quote Originally Posted by Firebirdjones View Post
    Sticky tires are a completely different ballgame however.
    Yes sir.... I run from 1/4 to 1/8th a tank at the track. You can buy 93 octane up to 110 or 115 at the track here. But there is also a gas station only a few miles away. I have added weight with amp's and a sub in the back. The Hoosier's here do not like much air in them, 15 to 20 pounds. You can run so low that a bead lock will be needed. I drive to the track with the slicks on. While they are not street legal I have never had an issue. They also come out on the street from time to time. You just have to watch the weather. But if you do get caught in rain just park it.

  17. #57
    Moderator Firebirdjones's Avatar
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    Quote Originally Posted by Z28Thunder View Post
    Yes sir.... I run from 1/4 to 1/8th a tank at the track. You can buy 93 octane up to 110 or 115 at the track here. But there is also a gas station only a few miles away. I have added weight with amp's and a sub in the back. The Hoosier's here do not like much air in them, 15 to 20 pounds. You can run so low that a bead lock will be needed. I drive to the track with the slicks on. While they are not street legal I have never had an issue. They also come out on the street from time to time. You just have to watch the weather. But if you do get caught in rain just park it.
    Yes sir, I run drag radials on the chevelle, with some adjustability built into the suspension. I don't worry about any weight bias in that car at all.
    Just air down the drag radials right off the street and it cuts 1.5 60 foot times. Just stab and steer. Makes things easy.

  18. #58
    Senior Member Z28Thunder's Avatar
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    Quote Originally Posted by Firebirdjones View Post
    Yes sir, I run drag radials on the chevelle, with some adjustability built into the suspension. I don't worry about any weight bias in that car at all.
    Just air down the drag radials right off the street and it cuts 1.5 60 foot times. Just stab and steer. Makes things easy.

    Drag slick here but yes same thing. Air the slick down and you can 1.5x 60' all day..

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    That will be a close run but it really does depend on the driver.

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    Quote Originally Posted by blackSS01 View Post
    40 psi is fairly high for street tires IMHO

    You would know more then me about the racing since you probably have much more time at the track then I do. I have a couple hundred passes lifetime

    I know I cut my one of my best 60' with 28lbs in my street tires

    I know the launch is key but a full tank is a lot of weight to get moving once you get off the line. I'll try anything once though
    Yeah, I was that way once.....

    Math + Me + variable = f'ed up

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