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  1. #1
    Join Date
    May 2007
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    Default WEIGHT vs HORSEPOWER

    In a limited late model.If you can run 100# lighter,how much hp can you afford to give up and still be competetive ? Tires & spoiler being the same.

  2. #2
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    May 2007
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    470

    Default

    Super: EST 850 hp:

    2350 lb / 850 hp = 2.764 lb per hp
    2250 lb /2.764 lb per hp = 814 hp

    604 Crate Est 435HP:
    2350 lb / 435 hp = 5.40 lb per hp
    2250lb /5.40 lb per hp = 416 hp

  3. #3
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    May 2007
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    Batavia, OH
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    Default

    Good question. I'm used to giving up power because of budget alone. So, I can only tell you it can be done without a weight break.
    Droop isn't the problem.

    Arizona Speedway-2. Ohio Valley-1
    East Bay-2. Lawrenceburg-2
    All-Tech-1. Florence-2
    Volusia-1. Portsmouth-3
    Jackson -4. I77 -1
    Mudlick -1
    Moler -2
    Atomic-2

  4. #4
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    May 2007
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    Default

    If it were drag racing I could tell you exactly.100# is worth a tenth in a quarter & .06 in an 1/8 mile.Maybe somebody can translate that into dirt track.

  5. #5
    Join Date
    Jul 2014
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    376

    Default

    Cubic inch being equal? I couldn't put a # on it. Depends on WHOM your competition is, track type/layout, surface and condition of it and weather conditions run in.....appropriateness of tire. Hard spec tires? And of course the ballasst behind the wheel! Grin

  6. #6
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    May 2007
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    Default

    100 pound could be priceless if both have enough power
    BUCKLE UP NOW, YA HEAR?

  7. #7
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    May 2007
    Location
    Kansas
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    Default

    Too remotely answer the question you first need to know if all the power the heavier car has can be used.
    Then I would venture to say somewhere around what HP they can put down would be the number.

    It's really not an easy question to answer as the track changes and so does HP demand. It's almost impossible to make the cars even in all conditions. Usually the lower power/light wieght is at a fair disadvantage in the traction and usually has an advantage in the slick (least as far as what rules tracks end up with)

  8. #8
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    Nov 2012
    Location
    Wisconsin
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    2,951

    Default

    Back in the stone age when I started we ran 4000# 57-64 Fords against 2600# Tri-Five Chevies. Fords were built from water pipe while the fast Chevies were made from exhaust tubing.

    The winningist driver on the circuit, Frank Smith, won 11 track championships and six or seven area championship which was the total points from three tracks.

    Frank ran '57-'58 Fords with 312 Y-block or 406 FE engines. The rules dictated open rear ends, 6 1/4 inch tires but no engine restrictions. We ran one 289 in '71 the rest were 427's.
    Member of the Luxemburg Speedway Hall of Fame
    Class of 2019

  9. #9
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    Dec 2008
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    thedirtysouth
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    Default

    the old man that helped me get started was winning races in the 60,s with an old flat head ford when most every one else had gone to the ohv chevy , and its obvious the chevy,s probably had more power.....

  10. #10
    Join Date
    Feb 2015
    Posts
    512

    Default

    Last season the area Limited Lates let us run with them at a couple of tracks. They're all four bar, 2,350 pound full LM chassis with a 604 or a built 406 on a 2 barrel and 11" D55s. Our Camaro clipped, leaf springed Pro Stock with 8" Dirt Bozz and a home built 383 on a 500 2 barrel has to weigh 3,000 and we gave them fits. Three seconds in the mains (never won), and were 2nd in points at one track until the last race when carb problems took us out.

    Interestingly, even with our success running against them we were usually the only Pro Stock to try it. So, yeah, weight and HP ain't always the answer. Like fastford's example I was beating ohv stuff with a flathead until the end of the '60s, though mostly the overweight big engines; big Cadillacs, Olds, Chryslers, etc. Took them a while to figure out that a big heavy engine on the front of an old Ford straight axle made an evil handling beast. When the light weight small blocks took over my flatheads were toast.

  11. #11

    Default

    If I get to pick the placement of the weight and the weight break is not excessive I will take the power everytime. If I need to dial it back a little later in the night I can but I can't handle being on the mat knowing I have everything I got on the ground and watching the other guy just drive away.

  12. #12
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    May 2007
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    Quote Originally Posted by Mopar DLM View Post
    If I get to pick the placement of the weight and the weight break is not excessive I will take the power everytime. If I need to dial it back a little later in the night I can but I can't handle being on the mat knowing I have everything I got on the ground and watching the other guy just drive away.
    That just doesn't happen much on dirt.
    Droop isn't the problem.

    Arizona Speedway-2. Ohio Valley-1
    East Bay-2. Lawrenceburg-2
    All-Tech-1. Florence-2
    Volusia-1. Portsmouth-3
    Jackson -4. I77 -1
    Mudlick -1
    Moler -2
    Atomic-2

  13. #13
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    Dec 2008
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    thedirtysouth
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    Default

    the traction enhancers we have to day are making it happen more than it did say , 10 yrs ago....

  14. #14

    Default

    The original post was about a limited late model not necessarily the 900+HP unlimited budget late model racing of a national series. So traction shouldn't be as big of an issue. If it's limited VS crate then I take the extra torque and pull the crate 3 car lengths off every turn.

  15. #15
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    Aug 2018
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    Bronson made his name a few years ago, outrunning those limiteds(550-600hp) with his 604! fact!

  16. #16
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    May 2007
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    Quote Originally Posted by ZERO25 View Post
    Bronson made his name a few years ago, outrunning those limiteds(550-600hp) with his 604! fact!
    People still underestimate the power of corner speed.
    Droop isn't the problem.

    Arizona Speedway-2. Ohio Valley-1
    East Bay-2. Lawrenceburg-2
    All-Tech-1. Florence-2
    Volusia-1. Portsmouth-3
    Jackson -4. I77 -1
    Mudlick -1
    Moler -2
    Atomic-2

  17. #17
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    May 2007
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    3,356

    Default

    I'm not a racer,but here are the numbers.Built many of each,so numbers are real.
    Raised runner steelhead-685hp @2400#
    Standard runner Mullins steel head-632hp@ 2300#
    Standard runner Brodix Track 1 aluminum head-649hp @ 2300#
    Don' t need a lot of variables thrown in,just make a choice.All on same tire,all same ci, same carb.

  18. #18
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    May 2007
    Location
    Batavia, OH
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    I'd take #3 every day.
    Droop isn't the problem.

    Arizona Speedway-2. Ohio Valley-1
    East Bay-2. Lawrenceburg-2
    All-Tech-1. Florence-2
    Volusia-1. Portsmouth-3
    Jackson -4. I77 -1
    Mudlick -1
    Moler -2
    Atomic-2

  19. #19
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    May 2007
    Location
    Kansas
    Posts
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    Default

    Quote Originally Posted by MasterSbilt_Racer View Post
    I'd take #3 every day.
    AGREED!

    message to short adding text here to post, lol

  20. #20
    Join Date
    Jul 2014
    Posts
    376

    Default

    Quote Originally Posted by billetbirdcage View Post
    AGREED! message to short adding text here to post, lol
    Me three on number three!

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