Quarter Miles, ET, dynos and forumlas - the "Toxcheap" factor
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I've posted before the formulas on 1/4 mile times to HP. What many don't realize is that all the quickness and attitude of any single lane "winner" is in that formula. If you take all the Toxcheap's of the world in the last 40 years, with all the Toxcheap's of the world that win vs the guy in the other lane.... You get a constant that is applied to the formula. In figuring HP/Weight equations, the recognized "Toxcheap" standard constant = 5.825... So,
HP = weight/(ET/5.825)^3
WEIGHT = (ET/5.825)^3 x hp
ET = (3^ root of weight/hp) x 5.825
MPH = (3^ root of hp/weight) x 234
From these equations you can go FROM the dyno to the track or TO the dyno from the track to validate HP or 1/4 POTENTIAL. After 50 years and millions of 1/4 mile runs, "Toxcheap factor" just becomes a number. An interesting note, as a result of the last 20 years of FWD cars, you now see a slight revision to the constant applied to FWD to account for decreased traction on the drive wheels compared to RWD. For AWD however, Toxcheap's own numbers appear to validate the RWD factoring, but he'd need a better dyno number to really validate that.
This physics constant is the defined as everything "other" than HP to weight combined, including: reaction, gearing, weather, traction, luck, fudge. Red lights are a DQ/DNF, and are not figured into the equation.
Hope this clears up a LOT of misunderstandings.
Scott "butt dyno" J
HP = weight/(ET/5.825)^3
WEIGHT = (ET/5.825)^3 x hp
ET = (3^ root of weight/hp) x 5.825
MPH = (3^ root of hp/weight) x 234
From these equations you can go FROM the dyno to the track or TO the dyno from the track to validate HP or 1/4 POTENTIAL. After 50 years and millions of 1/4 mile runs, "Toxcheap factor" just becomes a number. An interesting note, as a result of the last 20 years of FWD cars, you now see a slight revision to the constant applied to FWD to account for decreased traction on the drive wheels compared to RWD. For AWD however, Toxcheap's own numbers appear to validate the RWD factoring, but he'd need a better dyno number to really validate that.
This physics constant is the defined as everything "other" than HP to weight combined, including: reaction, gearing, weather, traction, luck, fudge. Red lights are a DQ/DNF, and are not figured into the equation.
Hope this clears up a LOT of misunderstandings.
Scott "butt dyno" J
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Google ping "1/4 mile calculators" they have a plug and play for the "Toxcheap" factor. These are just sofware versions of the above formulas for those feeling mentally challenged.
Cheers!
SJ
Cheers!
SJ
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Us old guys used TI calculators, you younger guys google. You might even find some with attached wave files so you can hear the speed too woffutt.
Scott "sharing the eye crossing secrets of plug and play formulas" Justusson
Scott "sharing the eye crossing secrets of plug and play formulas" Justusson
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5.825 and 234 are constants. Since we have humans driving cars, you have a delay from the light to the start of time. Since we have humans driving/building cars, you have wheelspin, starting rpm, feather throttle, clutch takeup, slip, COF, ambient temp, etc.
What is a GIVEN in the equations? HP and Weight OR ET and MPH. What "numbers" incorporate a million Toxcheaps "physics defying launches", shortyq's "flying pig" or Rockinv8q "nicotine/caffeine" affects? Hale proposes 5.825 and 234 hits 6 standard deviations from the mean in terms of TARGET/POTENTIAL when using the physics equation of acceleration in a quarter mile.
Helps?
Scott J
1387 "the Flying Pig" known to squeal a 10.05, never known to hit her potenial 9.3 strip bacon.
What is a GIVEN in the equations? HP and Weight OR ET and MPH. What "numbers" incorporate a million Toxcheaps "physics defying launches", shortyq's "flying pig" or Rockinv8q "nicotine/caffeine" affects? Hale proposes 5.825 and 234 hits 6 standard deviations from the mean in terms of TARGET/POTENTIAL when using the physics equation of acceleration in a quarter mile.
Helps?
Scott J
1387 "the Flying Pig" known to squeal a 10.05, never known to hit her potenial 9.3 strip bacon.
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