The calculator can also be used in reverse to estimate your car's power given a measured quarter-mile elapsed time or final speed. 1 / 4 Mile ET Calculator. Taking into account the driver's weight (let's use Lewis Hamilton, who weighs 150 lb), that makes a total weight of 1788 lb. Welcome to SAU Community, like most online communities you must register to view or post in our community, but don't worry this is a simple free process that requires minimal information for you to signup. Enter the total weight of the car and driver. The trap speed results are more spread out, ranging from 183 mph for Huntington to 191 mph for Hales. The start will be the hardest part, as you are accelerating from a standing start. 1/4 Mile RPM Calculator. The final speed is an approximation (within 5 mph), real speed will vary by rear end ratios, heat, traction, shifting, wind direction, etc! Figure your ¼ mile time. There are scores of factors that can affect quarter mile and 0-60mph times that may affect the results. 0-60, 0-100, 1/4 mile performance calculator. Home Page. 1/4 & 1/8 Mile Elapsed Time Calculator. The results are similar from all three equations, and they give a good first-order approximation of the quarter-mile performance figures without considering some of the other variables that are difficult to determine. Be apart of SAU Community by signing in or creating an account. Very few cars run 100% of their optimum. 3) All other values will be automatically calculated. However, Fox made similar measurements to Huntington and refined the constants in his equations resulting in the following formulas: In the 1980s, drag racer, engineer and computer programmer Patrick Hale produced software that took all the variables listed above into account to estimate the ET and trap speed. To calculate your approximate 1/4 mile time enter the hp & weight in KG (not lb) HP Weight kg (incl driver!) So he plotted the data on a graph of weight/power against the 1/4-mile elapsed time and derived the following empirical equation (a quarter-mile ET calculator): ET = 6.290 * (weight / power)¹ᐟ³. How to use the quarter mile calculator: 1. 23 Mount Erin Rd, Blair Athol NSW 2560, Australia +61 2 9607 2299 1/8-mile to 1/4-mile conversion table The following table can be used to estimate what your … To do this, put in its weight and then enter a value for either the time or the speed. Not a substitude for actual testing. So he plotted the data on a graph of weight/power against the 1/4-mile elapsed time and derived the following empirical equation (a quarter-mile ET calculator): When it comes to plotting the final speed, it makes more sense to plot the power-to-weight ratio (more power and less weight means more speed) along the x-axis. The Huntington empirical formula for the final speed is, therefore: Don't worry if you only know your vehicle's weight and power in metric units, our 1/4-mile calculator will handle all the unit conversions for you! ¼ Mile ET & 1/8 Mile ET Conversions: ¼ Mile ET : 1/8 Mile ET : Enter the ¼ Mile ET or the 1/8 Mile ET and As you drop the clutch, the engine revs could significantly decrease if you don't smoothly engage the first gear. It combines a quarter-mile time calculator and a quarter-mile speed calculator. Anything from air and tyre temperature to less … 2) Click the 'Calculate' button. Learn how reducing the car's weight affects its performance. gear ratios and gearbox type (e.g., manual or automatic). However, he also produced similar formulas to estimate the performance values from just the power and weight: First, decide which formula to use. The results section shows you the estimated elapsed time over the 1/4-mile, and the final speed at the quarter-mile point. where: ET is the elapsed time over a quarter-mile distance. Start new topics and reply to others Subscribe to topics and forums … 1/4 mile time . For 60 foot, 330 foot and 660 foot split as well use our quarter mile calculator with incremental. The times shown are effectively the best most drivers can hope to achieve. Check out 44 similar classical mechanics calculators ⚙️, Huntington's quarter-mile ET and speed formulas, Fox's quarter-mile time and speed equations, Hale's quarter-mile speed and ET formulas, Comparison of the three equations with a worked example. His solution was to record the elapsed time and final speeds of different vehicles, plot the data on a graph, and find a line-of-best-fit to the data. The car we'll use is the Mercedes W10 Formula One car, with a peak horsepower of around 975 hp and a weight of 1638 lb (743 kg). Using only your car's power and weight, it will estimate its 1/4-mile elapsed time (ET) and final speed (trap speed). For a standard car, you can look up its weight in the manual or search for it online. 1/4 mile or quarter mile is a drag race, a type of motor racing in which the vehicle compete to be first to cross a finish line. Accuracy The stats calculator uses real world data from 100s of cars in conjunction with mathematical formulae in order to estimate the above times and speeds. It is an interesting exercise to see what the power requirements and weight limits are to meet your ideal strip time. Horsepower Calculator From 1/4 Mile Stats: Wallace Racing BACK to Calculators These equations are for recreation only. The answers will be for at sea level and standard pressure/temperature. 1/4 Mile Calculations. Let's compare the three formulas by way of a worked example. With this quarter-mile ET calculator, you can: In this article, you'll also learn about the history of attempting to calculate the elapsed time and speed over a quarter-mile, using only the vehicle's power and weight. Enter MPH, The Tire Height in Inches, The Rearend Ratio, Trans Ratio, & Converter Slip % RPM = (Rearend Ratio * MPH * 336.136 * Trans Ratio * (1 + (Conv Slip% / 100))) / Tire Height MPH Tire Height Rearend Ratio Trans Ratio Conv Slip % RPM = ? Choose which unit system of measurement you need from the drop-down menu; 2. (no weather correction). When performing the quarter-mile run, you need to maintain the peak power rpm over the entire distance. 60' to 1/4 Mile Calculator. Not a substitude for actual testing. Instructions: 1) Enter a value in any box. Given below is the 1 / 4 mile elapsed time calculator to calculate 1 / 4 mile ET from horsepower. If you have modified the engine, take it to a garage to test its peak power output. You can use this quarter mile calculator to determine the terminal speed (trap speed) and quarter-mile elapsed time (ET) of a vehicle based on its weight and power. Rear Wheel HP is assuming 10% drivetrain loss. Back in the 1950s, engineer and automotive enthusiast Roger Huntington wanted to determine a mathematical relationship between a vehicle's power, weight, and performance over a 1/4-mile distance (a typical track length used in drag racing). For the elapsed time, common sense dictates that the heavier a vehicle is, and less horsepower it has, so the longer the ET over a quarter-mile distance will be. If you're thinking of entering your car into a drag race and are wondering how well it would perform, then this quarter-mile calculator is for you. 1101 W. Rialto Ave. Rialto, CA 92376, USA +1 (310) 361-0020. These equations are for recreation only. The other factors can significantly affect the elapsed time. The quarter mile time should be a normal run. ET and MPH in Quarter Calculator: Wallace Racing BACK to Calculators. The entire car must be set up perfectly to run these times. Weight is as the car sits on the line: driver and gas in it. Later on in the 1960s, a physics professor named Geoffrey Fox at the University of Santa Clara proposed a theoretical basis for Huntington's formula. Plugging these numbers into Huntington's equations gives: ET = 6.290 * (weight / power)¹ᐟ³ = 6.290 * (1788 / 975)¹ᐟ³ = 7.699 seconds, final speed = 224 * (power / weight)¹ᐟ³ = 224 * (975 / 1788)¹ᐟ³ = 183 mph, ET = 6.269 * (weight / power)¹ᐟ³ = 6.269 * (1788 / 975)¹ᐟ³ = 7.673 seconds, final speed = 230 * (power / weight)¹ᐟ³ = 230 * (975 / 1788)¹ᐟ³ = 187.9 mph, ET = 5.825 * (weight / power)¹ᐟ³ = 5.825 * (1788 / 975)¹ᐟ³ = 7.13 seconds, final speed = 234 * (power / weight)¹ᐟ³ = 234 * (975 / 1788)¹ᐟ³ = 191.17 mph. Quarter Mile Time: (Seconds) * The more accurate your input is, the more accurate the final speed will be! (i.e) from starting point to end line. Weight is as the car sits on the line: driver and gas in it. Compute ET and MPH at 60', 330', 660' and 1000' 60' time: He wrote up his theory in a 1973 article in The American Journal of Physics entitled, On the Physics of Drag Racing, coming up with the following significant variables that affect the ET and trap speed: Fox concluded that the power and the weight of the vehicle are the major factors in determining the final speed, making it more useful than the ET if you want to estimate the horsepower of a vehicle. 1/4 Mile Racing Final Speed Calculator. For an unmodified engine, you'll find it in the manual, quoted at a particular engine speed, measured in revolutions per minute (rpm). Enter the car's peak power output. The calculator can also be used in reverse to estimate your car's power given a measured quarter-mile elapsed time or final speed.

1/4 mile time calculator

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