1 8th mile horsepower calculator

Using Foot Pound Measurements. Horsepower is a calculation of torque multiplied by RPMs and then divided by 5252. The value 5252 is a rounded value of (33,000 sq ft lbf/min)/ (2 degrees rad/rev). Horsepower= …

This calculator estimates your 1/8 mile and 1/4 mile elapsed time (ET) and speed. Killing Time Dragracing Don't mind us, we're just killing time! Calculate your ET. This calculator estimates your 1/8 mile and 1/4 mile elapsed time (ET) and speed. kg lb hp kW. Result . ET 1/8: sec Speed 1/8: km/h mph ET 1/4: sec Speed 1/4: km/h mph. Sitemap ...Horsepower. Horsepower is a unit of measurement of power developed by engineer James Watt in the late 18 th century. Although its original purpose was to compare the output of steam engines with the power of horses (hence its name), it has since been adopted as a unit of measurement for all sorts of engines used to power things such as … Enter the MPH and Weight for 1/4 Mile Horsepower, Then Press 'Enter' Key HP = Weight * (MPH/234) ^ 3 ... 1/4 Mile MPH Calculator by RPM, Tire Height, Rearend Ratio ... Calculate 1/8th Mile ET with HP Correction. These equations are for recreation only. This calculator uses the Motorsports Standard Atmosphere (MSA). (Not ISA - International Standard Atmosphere) The HP Correction is a better determination of ET than the DA (Density Altitude). I have included them for your benefit.Eigth Mile to Quarter Mile Conversion. Wallace Racing. BACK to Calculators. 1/8th to 1/4 to 1/8th Calculator.

Calculate HP, Weight or Speed. Fill in any two of the three values to calculate the third. Weight - The weight of the vehicle in pounds. Trap Speed - The vehicle speed at the end of the 1/4 mile run. Horsepower - Estimated power the engine is making. Calculate 1/4 Mile HP, Weight or Speed. Weight (lbs) Trap Speed (mph) For a more accurate calculations try Larry Meaux's Pipe Max. His program is excellent and will provide a lot of info. Pipe Max. For an excellent ET Calculator, try ET Analyst from Max Race Software . Wallace Racing - ET/MPH/HP Calculator. Weight is as the car sits on the line: driver and gas in it. Calculate ET and MPH from HP and Weight. This calculator estimates your 60 foot, 1/8 mile ET, 1/4 mile ET, and trap speed based off your car’s weight and wheel horsepower. Phone: 763-316-5882. Ford Mustang site featuring a large, friendly enthusaist community for the 1964-1/2 to 2020 Ford Mustang, Mustang GT, Mustang Cobra, Classic Mustang with message forums, classifieds, news, tech, a horsepower calculator, and the ability to post your own Mustang on our User's Rides section and upload your own pictures, sound, and video galleries.Gear Ratio Calculator. Use our simple Gear Ratio Calculator to quickly find the correct gear ratio for your ring and pinion gear set. Save yourself the headache and let us figure out your ring-and-pinion gear ratio! Select the value you want to solve for. For the Tire field, enter your tire diameter in inches.

This calculator estimates your quarter mile elapsed time (ET) when given the weight of the car and flywheel or wheel horsepower. A 17% driveline loss is assumed for flywheel HP. 1/8-MILE TO 1/4-MILE CONVERSION TABLE. The following table can be used to estimate what your car would run in the quarter-mile based on your 1/8-mile elapsed time. Horsepower Calculator From 1/8th Mile Stats. Wallace Racing BACK to Calculators Todays date is 3/30/2024. These equations are for recreation only. Not a substitude for actual testing. Rear Wheel HP is assuming a 10% drive train loss. Weight is as the car sits on the line: driver and gas in it.The 1/8th Mile HP Calculator is a powerful tool designed to estimate a vehicle's cavalo-vapor based on specific performance metrics. It utilizes a matemático formula to compute the horsepower of a vehicle, particularly useful in racing scenarios where acceleration over a shorter distance, such as an 1/8th mile race, is crucial.This calculator is for entertainment value only. Not to be used in place of real testing. Use zero for Converter Slip if manual Transmission. Gear Calculator: RPM: RPM Trans Gear: Tire Diameter: Speed: Converter Slip: % Input DATA Please MPH Calculator: RPM: RPM Gear Ratio : Trans Gear: Tire Diameter: ...

Publix palatka.

The formula for this approach is: horsepower = RPM (multiplied by) torque (divide by) 5,252. If the RPM of any vehicle motor is 5,600 RPM and torque is 350 foot-pounds, then all you need to put the values in the formula to calculate horsepower of the engine. (5,600 × 350) ÷ 5,252 = 373.19 HP.See also 1 8th Mile HP Calculator Online. What is the significance of the Chip Thickness Ratio in machining operations? The Chip Thickness Ratio allows engineers to understand the chip's behavior, assess the efficiency of a cutting operation, make necessary adjustments to the cutting parameters, predict tool wear, and improve the …This method uses the weight of the car and the time it took that car to travel 1330 feet (¼ mile). The formula is: hp = weight / (ET / 5.825) 3. The Trap-speed method. This method uses the weight of the car and the speed at which the car completed the quarter-mile run. The formula is: hp = weight * (speed / 234) 3. Let's try it. Fill in the ...1/8th Mile ET-MPH-HP Calculator These equations are for recreation only. Not a substitude for actual testing. Wallace Racing - 1/8th Mile ET/MPH/HP Calculator Weight is as the …Dec 17, 2023 · The 1/8th Mile HP Calculator is a powerful tool designed to estimate a vehicle's horsepower based on specific performance metrics. It utilizes a mathematical formula to compute the horsepower of a vehicle, particularly useful in racing scenarios where acceleration over a shorter distance, such as an 1/8th mile race, is crucial.

D-Link DP-300U 10/100TX 1-USB Port 2-Parallel Port Print Server. HP Wireless G Print Server. Writing Excel Macros with VBA. Linksys PSUS4 PrintServer for USB with 4 Port Switch. HP Wireless Printing Upgrade Kit. IOGEAR USB 2.0 Print Server, 1-Port. Xantrex Technologies 851-0400 XPower Plus 400-Watt Inverter. Home Wind …The formula used in the Horsepower Quarter Mile Calculator takes into account the vehicle’s weight, elapsed time (ET), and speed at the end of the quarter-mile. The formula is as follows: Horsepower = (Weight / (ET / 5.825) ^ 3) * (Speed / 234) ^ 3. In this formula, “Weight” refers to the weight of the vehicle in pounds, “ET” is the ...Here is an example: 1. Constant: 5.825 2. Total Weight of Car (with the driver included): 500 3. 84. Click the “Calculate” button, and the 1/4 Mile Calculator will return this information: 10.515 seconds. Therefore, your quarter-mile elapsed time for a 500-pound car with 85 horsepower and a constant of 5.825 is 10.5 seconds.When it comes to compensating employees for business-related travel, calculating mileage reimbursement can sometimes be a complex task. There are various methods that businesses ca...There are 5,280 feet in 1 mile. One can make this calculation by knowing the number of yards in a mile and then converting yards to feet. Miles and feet are measurements used in th...Eigth Mile to Quarter Mile Conversion. Wallace Racing. BACK to Calculators. 1/8th to 1/4 to 1/8th Calculator.Wallace Racing - ET/MPH/HP Calculator for Quarter Mile Runs. Weight is as the car sits on the line: driver and gas in it. HP is at the crank The answers below will be for at sea level …From the speed and time, they get the distance. When they see 1/4 mile (or 1/8th mile) they stop calculating and display the speed and the time taken to reach that speed and distance. Now here is an interesting thing. It takes a certain number of horsepower-seconds (certain energy applied) to reach a certain speed for a given weight.Calculate the theoretical 0-60 Time for a given application based on the Vehicle Horsepower (at the flywheel), Vehicle Weight (in pounds), Drive Type, and Transmission Type. Assumptions: This calculator has been designed around statistical averages based largely on sample data from Edmunds.com. Power to weight ratio is the primary factor, but ...

Why Use a 1/8 Mile to 1/4 Mile Conversion Calculator? A 1/8 mile to 1/4 mile conversion calculator can be useful for estimating a car’s performance at a different distance. For example, let’s say a car has only been tested and tuned for the 1/8 mile distance, but the driver and team plan to compete at a track that uses the 1/4 mile distance.

To calculate minutes per mile, use the mathematical formula for rate (rate = distance/time). You need to know the distance traveled and the amount of time it took to travel that fa... Enter the MPH and Weight for 1/4 Mile Horsepower, Then Press 'Enter' Key HP = Weight * (MPH/234) ^ 3 ... 1/4 Mile MPH Calculator by RPM, Tire Height, Rearend Ratio ... Calculators. ET calculator: 1/4 mile, 1/8 mile, 0 – 60 mph; Camshaft valve timing calculator; Static and dynamic compression ratio calculator; Build thread; Shop; Customer photos; Info. Contact; Terms and conditions; CartThe 1/8th Mile HP Calculator is a powerful tool designed to estimate a vehicle's cavalo-vapor based on specific performance metrics. It utilizes a matemático formula to compute the horsepower of a vehicle, particularly useful in racing scenarios where acceleration over a shorter distance, such as an 1/8th mile race, is crucial. This calculator estimates your quarter mile elapsed time (ET) when given the weight of the car and flywheel or wheel horsepower. A 17% driveline loss is assumed for flywheel HP. 1/8-MILE TO 1/4-MILE CONVERSION TABLE. The following table can be used to estimate what your car would run in the quarter-mile based on your 1/8-mile elapsed time. To calculate minutes per mile, use the mathematical formula for rate (rate = distance/time). You need to know the distance traveled and the amount of time it took to travel that fa...Yesterday, dark clouds started to build over the World of Hyatt as a new, pricier, eighth category was temporarily spotted on Hyatt's website. There were no ... Yesterday, dark clo... 2. Choose which equation you would like to use to calculate the terminal speed at the end of the quarter-mile and the quarter-mile ET. 3. Enter the total weight of both the vehicle and the driver. 4. Input the power of the vehicle's engine. 5. Click on the "Calculate" button to generate the calculation. 1/4 Mile ET & Trap Speed Calculator. Eigth Mile Stats to Quarter Mile Stats. 1/8th Stats to 1/4 Stats Calculator. Wallace Racing BACK to Calculators. Enter your 1/8th Mile ET and 1/8 Mile MPH of your car.

Harbor freight porterville.

Jetblue 1242.

Prime-HP-calculator-16. HP Prime Graphic Calculator. Book_.png · DOWNLOAD MANUAL. UPC: 1-9162803008-8 PCUA HPPRIME#INT Categories Calculators, Calculators - ...mph. 4000 rpm. mph. 7500 rpm. mph. Calculate Rear End Gear Ratio. Enter the tire diameter in inches, the rpm’s of the engine at entered speed as indicated by your speedometer in mph. This calculator is for a 1:1 final drive ratio.Enter the race weight. Horsepower (HP) Enter horsepower. Quarter mile et. Eigth mile et. 0 - 60 mph et. Got a "friend" boasting about hypothetical performance figures? See if …Mine and my wifes cars take alomst exactly 4 more seconds to make the second 1/8 mile. WE are both running 6.7-6.8 1/8 mile times. I think 1/4 mile is a waste, there is 4 seconds wasted to the day and 4 more seconds you can pop the top of a cold one,lol. Reply. 04-02-2009, 12:24 PM.The formulas are: Estimated RWHP for 1/4 mile = (MPH/234)^3*Weight. Estimated RWHP for 1/8 mile = (MPH*1.27/234)^3*Weight. And it is estimated that RWHP is between 80% to 85% of flywheel horsepower due to drivetrain losses including but not limited to the transmission, rearend gears, bearing, the wheels themselves turning, etc. Example:The M1 Tank Engine - Tank engines weigh less and provide more power than reciprocating engines. Learn about the capability of tank engines and what type of fuel an M1 tank engine u...Use the Drag Performance Calculator to calculate the theoretical 1/8 Mile ET, 1/4 Mile ET, 1/4 Mile Top End Speed, and Ideal 1/4 Mile Gear Ratio and the 0-60 MPH Time Calculator to calculate the theoretical 0-60 Time for a given application. Drag Coefficient (Cd): Frontal area (sq. ft.): Weight (lbs): Speed (mph):Horsepower Calculator. Pump Flow (GPM) Pressure (PSI) Horsepower (HP) Formula: GPM * PSI / (1714 * efficiency) = HP. Efficiency of 87.5% is assumed for these calculations. Search for: Search for: Contact Us. 1610 Blairs Ferry Road NE Cedar Rapids, IA 52402 Phone: (800) 333-7004 www.ifpusa.com. Quick Links. About Us Careers …The formula used by the 1/8th Mile HP Calculator is: HP = (Weight × (1/2) × Velocity^2) / (Time / 5.825) Where: HP represents the horsepower of the vehicle. Weight stands for the weight of the vehicle in pounds (lbs). Velocity is the velocity ( speed) of the vehicle in feet per second (fps).Horsepower Calculator. Pump Flow (GPM) Pressure (PSI) Horsepower (HP) Formula: GPM * PSI / (1714 * efficiency) = HP. Efficiency of 87.5% is assumed for these calculations. Search for: Search for: Contact Us. 1610 Blairs Ferry Road NE Cedar Rapids, IA 52402 Phone: (800) 333-7004 www.ifpusa.com. Quick Links. About Us Careers … ….

Have a bunch of frequent flyer miles accumulated but not sure where to go? Or want to make the most of those miles based on a trip you’re planning? Head over to Milez to see how fa...1/8th Mile Speed: in MPH. Input Data please. Just to give you an idea of what other perfomance cars run 0 to 60 in, here are some stats: My Pontiac powered rail = 1.10 seconds. Supra Twin Turbo (stock) = 4.7 seconds. Lamborghini Diablo = 3.4 seconds. Ferrari 550 Maranello = 4.2 seconds. School bus fully loaded = 47.325 seconds.Wallace Racing - 1/8th Mile ET/MPH/HP Calculator. Weight is as the car sits on the line; driver and gas in it. Calculate ET and MPH from HP and Weight. Weight. HP. Input your HP and Weight please. Calculate HP From Weight and MPH.1/4 Mile Calculator - Basis for Formula. Our quarter mile and 0-60 mph time and speed calculator has used real-life figures from 100s of officially published car statistics to test a complex formula. The weight section of the calculator automatically adds 150 lbs to account for yourself just in case you forget | get yourself on the weighing ...Nov. 11, 2025. Thanksgiving. Nov. 27, 2025. Christmas. Dec. 25, 2025. This free date calculator computes the difference between two dates. It can also add to or subtract from a date. Both can deal with business days and holidays.Why Use a 1/8 Mile to 1/4 Mile Conversion Calculator? A 1/8 mile to 1/4 mile conversion calculator can be useful for estimating a car’s performance at a different distance. For example, let’s say a car has only been tested and tuned for the 1/8 mile distance, but the driver and team plan to compete at a track that uses the 1/4 mile distance.Aluminum flywheel Aluminum drive shaft ECU flash tuner Cold air intake Large bore throttle body The 5.7 HEMI engine is available in the Dodge, Chrysler and Jeep vehicles, making it... Horsepower Calculator From 1/8th Mile Stats. Wallace Racing BACK to Calculators Todays date is 4/10/2024. These equations are for recreation only. Not a substitude for actual testing. Rear Wheel HP is assuming a 10% drive train loss. Weight is as the car sits on the line: driver and gas in it. 1/8th Mile Stats to 1/4 Mile Stats. Compute ideal MPH and times at 60', 330', 660' and 1000'. Convert 1/4 Mile ET to 1/8th Mile ET Calculator. Convert 1/4 Mile MPH to 1/8th Mile MPH Calculator. Hp From 1/4 MPH,ET and Weight Calculator. HP from ET with HP Correction NEW. 1 8th mile horsepower calculator, just ran the s10 today and i am trying to find a calculator for figuring hp from 1/8 mile et and mph the truck weighs around 2900# my time slip .731 reaction time 60' 2.39 mph 96.7 et 8.82 truck has 4.10 gears and a gov-loc thanx, These equations are for recreation only. This calculator uses the Motorsports Standard Atmosphere (MSA). (Not ISA - International Standard Atmosphere) Grains - Grains of water vapor per pound of dry air. The HP Correction is a better determination of ET than the DA (Density Altitude). I have included them for your benefit. 1/4 Mile ET …, Horsepower Calculator From 1/8th Mile Stats. Wallace Racing BACK to Calculators Todays date is 4/10/2024. These equations are for recreation only. Not a substitude for actual testing. Rear Wheel HP is assuming a 10% drive train loss. Weight is as the car sits on the line: driver and gas in it., This Calorie Calculator is based on several equations, and the results of the calculator are based on an estimated average. The Harris-Benedict Equation was one of the earliest equations used to calculate basal metabolic rate (BMR), which is the amount of energy expended per day at rest. ... Running (9 minute mile) 624: 773: 923: Bicycling (12 ..., This maybe caused it to feel loose) On all these passes I was crossing the finish line at somewhere around 4900 rpm. Way too low for sure. These passes put me (based on the Wallace Racing Calculator) at around mid 11's in the 1/4 mile. To get into the 10's, my 1/8th mile ET should be around 6.98 or so., JOHN WILSON. 2256 posts · Joined 2000. #2 · Oct 29, 2006. Bill, there's an "optimal 60' " formula that goes like this: 60'= (ET (1/4mi) x .12) + .17. Some combo's will do better, some worse. All depends on how well the chassis works along with how well the torque converter matches up to the tq curve. Like., The 1/8th Mile HP Calculator is a powerful tool designed to estimate a vehicle's cavalo-vapor based on specific performance metrics. It utilizes a matemático formula to compute the horsepower of a vehicle, particularly useful in racing scenarios where acceleration over a shorter distance, such as an 1/8th mile race, is crucial., Oct 2, 2023 · October 2, 2023 by GEGCalculators. 1/8 mile speed varies depending on the elapsed time it takes a vehicle to cover that distance. Faster times, like 4 seconds, can result in speeds around 200 mph, while slower times, like 10 seconds, may be closer to 80 mph. Vehicle power, weight, and track conditions influence these speeds. , chevette Discussion starter. 138 posts · Joined 2008. #14 · Jun 15, 2012. yes it is gonna be on NOS guys. thanks for all the great info. 4.30 gear now run 1/4 @ 8000 N/A. Gonna change converter for NOS. Really curious. When we ran a lot less HP & slower, we would gear the car for 1/8 mile if that's is all we ran., - Intake Airflow from Horsepower - Rod Stroke Ratio - Stroke Size Rear Gear Requirements - Rear End Gear Ratio Needed - Speed from RPM, Rear & Trans. Gear Ratios - RPM from Speed, Rear & Trans. Gear Ratios Drag Strip Performance - 1/8 Mile Horsepower Requirements from MPH - 1/8 Mile Horsepower Requirements from ET - …, A small donation would be appreciated. Horsepower Calculator From 1/4 Mile Stats. Wallace Racing BACK to Calculators. April 30, 2024. These equations are for recreation only. Not a substitude for actual testing. Rear Wheel HP is assuming 10% drivetrain loss. Weight is as the car sits on the line: driver and gas in it., Drag Performance Calculator. By AssassinRacing.com. Calculate the theoretical 1/8 Mile ET, 1/4 Mile ET, 1/4 Mile Top End Speed, and Ideal 1/4 Mile Gear Ratio for a given application based on the Vehicle Weight (in pounds), Vehicle Horsepower (at the flywheel), RPM through lights (finish line), and Tire Diameter (Height) in Inches., Are you tired of spending hours trying to figure out the distance between two locations for your travel plans? Look no further. A miles distance calculator is the perfect tool to s..., If you've ever tuned your vehicle's engine, you have probably adjusted your timing. Timing affects the engine's combustion cycle and can impact performance. Gasoline-powered engine..., Wallace Racing HP Calculator For 1/8th Mile I think this shows a little high for our trucks, but it's the only one out there that I know of. '06 F250 King Ranch Short Box Crew NHRDA #4698 RIP Muley 9/21/54 - 9/25/09. Save Share. Like. goodstktbo., Dec 17, 2023 · The 1/8th Mile HP Calculator is a powerful tool designed to estimate a vehicle's horsepower based on specific performance metrics. It utilizes a mathematical formula to compute the horsepower of a vehicle, particularly useful in racing scenarios where acceleration over a shorter distance, such as an 1/8th mile race, is crucial. , 1/8th Mile Speed: in MPH. Input Data please. Just to give you an idea of what other perfomance cars run 0 to 60 in, here are some stats: My Pontiac powered rail = 1.10 seconds. Supra Twin Turbo (stock) = 4.7 seconds. Lamborghini Diablo = 3.4 seconds. Ferrari 550 Maranello = 4.2 seconds. School bus fully loaded = 47.325 seconds., The first episode of Star Trek aired on September 8th, 1966. Today, to celebrate the 50th anniversary of the series, we’re putting on a playlist of all the iconic music that’s come..., October 2, 2023 by GEGCalculators. 1/8 mile speed varies depending on the elapsed time it takes a vehicle to cover that distance. Faster times, like 4 seconds, can result in speeds around 200 mph, while slower times, like 10 seconds, may be closer to 80 mph. Vehicle power, weight, and track conditions influence these speeds., This calculator takes into account two crucial factors: the vehicle's weight and its speed in miles per hour (MPH). By inputting these values, you can gain a precise estimate of your vehicle's horsepower. The Formula of 1/4 Mile Horsepower Calculator. To calculate the 1/4 mile horsepower, you need to apply a specific formula: HP = …, 1101 W. Rialto Ave. Rialto, CA 92376, USA +1 (310) 361-0020. 23 Mount Erin Rd, Blair Athol NSW 2560, Australia +61 2 9607 2299 , Why Use a 1/8 Mile to 1/4 Mile Conversion Calculator? A 1/8 mile to 1/4 mile conversion calculator can be useful for estimating a car’s performance at a different distance. For example, let’s say a car has only been tested and tuned for the 1/8 mile distance, but the driver and team plan to compete at a track that uses the 1/4 mile distance., Wallace Racing BACK to Calculators. This calculator is mainly for Naturally Aspirated runs. Enter your 1/8th Mile ET and 1/8 Mile MPH of your car. 1/8th Mile ET: , Using the 1/8 Mile Time Calculator is a straightforward process: Enter Initial Speed: Input the initial speed of your vehicle at the starting point. Enter Final Speed at 1/8 Mile: Specify the velocity of your vehicle when it reaches the 1/8 mile mark. Enter Acceleration: Input the acceleration of your vehicle during the race., - Intake Airflow from Horsepower - Rod Stroke Ratio - Stroke Size Rear Gear Requirements - Rear End Gear Ratio Needed - Speed from RPM, Rear & Trans. Gear Ratios - RPM from Speed, Rear & Trans. Gear Ratios Drag Strip Performance - 1/8 Mile Horsepower Requirements from MPH - 1/8 Mile Horsepower Requirements from ET - 1/8 Mile ET from MPH, John S Kiernan, WalletHub Managing EditorMay 24, 2022 John S Kiernan, WalletHub Managing EditorMay 24, 2022 Opinions and ratings are our own. This review is not provided, commissio..., Our boost horsepower calculator is extremely easy to use. You only need to know your naturally aspirated engine's current power output and the pressure you want a supercharger to create. That's it. The output is presented in the last field of the calculator. Superchargers usually run at a boost pressure between 6 and 9 pounds per square inch …, The 1/8th Mile HP Calculator is a powerful tool designed to estimate a vehicle's cavalo-vapor based on specific performance metrics. It utilizes a matemático formula to compute the horsepower of a vehicle, particularly useful in racing scenarios where acceleration over a shorter distance, such as an 1/8th mile race, is crucial., The formulas are: Estimated RWHP for 1/4 mile = (MPH/234)^3*Weight. Estimated RWHP for 1/8 mile = (MPH*1.27/234)^3*Weight. And it is estimated that RWHP is between 80% to 85% of flywheel horsepower due to drivetrain losses including but not limited to the transmission, rearend gears, bearing, the wheels themselves turning, etc. …, Calculate 60' 1/8 & 1/4 Mile ETs & Trap Speed From Horsepower. This calculator estimates your 60 foot, eighth and quarter mile elapsed times and trap speed when given the weight of the car and flywheel or wheel horsepower. An 11% driveline loss is assumed for Wheel HP. See my Free Android Drag Racing Calculator App in the Google Play Store., To calculate the area of a structure or section of land mass in square miles, use the formula for area of the section’s shape with the dimensions, such as length, width, and radius..., Aug 11, 2005 · The formulas are: Estimated RWHP for 1/4 mile = (MPH/234)^3*Weight. Estimated RWHP for 1/8 mile = (MPH*1.27/234)^3*Weight. And it is estimated that RWHP is between 80% to 85% of flywheel horsepower due to drivetrain losses including but not limited to the transmission, rearend gears, bearing, the wheels themselves turning, etc. Example: , Engine Rear Wheel Horsepower Calculator Based on total vehicle weight and 1/4 mile MPH. To use this horsepower calculator enter the mph trap speed at the 1/4 mile mark from one of your dragstrip ET slips. Then enter the total weight of your vehicle, as raced, including the drivers weight. The best way to get the weight is to weigh your vehicle ...