Horsepower gain calculator motorcycle Use our torque to horsepower calculator to find your engine’s power output. Engine horsepower (HP) represents the raw power generated by the engine, wheel horsepower (WHP) indicates the usable power that reaches the wheels after accounting Nov 7, 2006 · It's always fun to see how much hp a car would need to equal the hp/ton ration a bike puts out. To calculate the weight of a motorcycle, take the listed weight of the bike, add the weight of the rider, then add 35 pounds for lubricants, fuel, etc. 000) Note: For pistons ABOVE the block @ TDC – value in box must be a POSITIVE number (0. That’s where a CC to HP Calculator comes in handy! Let’s break it down. g. 00 cc/min Reset Injector Flow Rate at Pressure Rated Flow cc/min lb/hr Rated Pressure PSI ba Nov 7, 2025 · Free boost horsepower calculator. Jun 9, 2022 · Is there a rule of thumb ( nothing steadfast) concerning the raising of compression in my 11. Choose to calculate horsepower or torque Horse Power Torque (ft·lbs) Enter the following values to calculate horsepower Torque in foot pounds (ft·lbs) Engine RPM Apr 2, 2009 · Motorcycle performance data tested by the Motorcyclist Magazine staff using a Dynojet dynomometer and manufacturer data. Enter the engine RPM at which you want to estimate Aug 30, 2017 · The power gain per point of compression is a diminishing return, the higher the compression gets. It's like having an online rolling road. Description: Do you have a high performance car, motorcycle, truck or vehicle, built a new engine, performed a tune up or installed a performance part? Try out this calculator get a rough estimate of horsepower. Want to know how much horsepower your engine makes? The Built Bottom End Performance horsepower calculator will calculate your engine's wheel (whp) and crank (chp) horsepower using proven mathematical functions based on real-world examples. 08 hp So that 50lbs of equipment is LIKE losing a little under 6 hp as those horses will now be dedicated to hauling that This Calculator will figure the duration and LSA of your camshaft using your inputs. If we at GoFastMath. This helps you make informed decisions about which modifications to prioritize for optimal performance. There are may variables, such as nozzle type and distribution Nitemare Performance 1/4 Mile calculator Enter your vehicle weight in lbs, and engine horsepower, then click either of the grey buttons to calculate your approximate 1/4 mile ET (seconds) and trap speed (mph). 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. For extra weight loss motivation, I'd like to know how many pounds I need to lose for each 1 HP gained (in equivalent performance). There is a lot of debate over head flow numbers and their relationship to horsepower. Weight: The total weight of the vehicle, measured in kilograms (kg). Get instant results! How to Use the Dyno Estimator This dyno estimator helps you estimate the horsepower of your engine based on several inputs. We always welcome any advice/experience that people can give us to help us Estimate horsepower output from any engine type (4-stroke, 2-stroke, any fuel type, turbo, blower, Wankel, etc. Jan 6, 2016 · Compression equals horsepower. Calculate your engine's horsepower using quarter mile time, trap speed, or RPM and torque with our free calculator. This calculator is mainly for wide open throttle and based on HP peak RPM range. Car and motorcycle enthusiasts use the calculator to estimate horsepower gains after installing performance parts like turbochargers, exhaust systems, or engine remapping. This conversion is useful for understanding an engine’s power output, especially in motorcycles, cars, lawnmowers, and other small vehicles or machinery. Select the unit system you would like to use from the drop-down menu 2. What is a Horsepower Calculator? A horsepower calculator is a tool designed to measure the power output of an engine using various parameters such as torque, RPM (revolutions per minute), acceleration time, or data from a dynamometer test. By knowing how much horsepower a turbo or supercharger can add, car enthusiasts can make informed decisions about modifications and upgrades to their vehicles. Ideal for automotive enthusiasts, engine builders and anyone wanting to know real performance gains with turbocharger or supercharger. Dec 5, 2024 · The WHP to HP Calculator helping in converting wheel horsepower to crank horsepower, offering a complete view of engine output. This will give you a fairly accurate running weight for any bike. 74) = 209. Calculating the power gains from various engine mods with our simple power gain calculator. If you're planning some engine mods then use our fully interactive BHP gain calculator to see what your expected power gains will be. Information about motorcycle horsepower, torque, acceleration, and speed. This calculator is particularly useful in the automotive and motorcycle industries, where engine sizes are often measured in cubic centimeters, but performance is typically expressed in horsepower. Enter the boost pressure in psi (if applicable). A 10% buffer should be sufficient, so this is what we use in our calculations. Horsepower gain from added boost Water injection calculator Intercooler efficiency calculator Boost compression ratio calculator Drivetrain Drivetrain & speed calculator Engine Sprockets Ratios Calculator Estimate Speed from Gear ratios, RPM and tire size Gear Ratio Calculator Performance Estimate Quarter-Mile MPH - Km/H from Horsepower Use this horsepower calculator to calculate peak engine horsepower and peak power RPM. Input the curb weight of the vehicle 3. The HP added by boost varies significantly based on factors like engine displacement, fuel system, and intercooler efficiency. Just enter torque (lb-ft) and RPM for instant results. C. However, the increase is most effective in cases where the original compression ratio is relatively low. Input Old/Original Compression Ratio and New Compression Ratio, Please Estimate your drivetrain loss and calculate your engine's wheel horsepower using our simple calculator. The HP is based on flywheel HP, for rear wheel HP multiply the results by your drive train percentage loss and subtract it from the result. Enter the starting BHP and tick the modifications applied for an approximate calculation of the power gain. What is the Power-to-Weight Ratio? The power-to-weight ratio indicates how much power a vehicle generates relative to its weight. We are pleased to share these helpful tools with our valued customers and guests. Currently this calculator works for naturally aspirated engines (no turbos, no superchargers, no nitrous) running on pump gas. MotorcycleCC. The Spicer Horsepower and Torque Calculator will quickly calculate approximate horsepower or torque, depending on your selections. This free engine horsepower calculator estimates vehicle engine horsepower using two different methods: the elapsed time method and the trap-speed method. This number tells us that removing 5. Follow these steps to use the calculator: Enter the engine displacement in liters. The big end is where it's at! Oct 3, 2024 · Understanding the impact of superchargers on horsepower (HP) is crucial for automotive enthusiasts and engineers alike. While WHP represents the power reaching the wheels, HP accounts for drivetrain losses, providing a more accurate picture of an engine’s full capacity. Power CommentsThe Otto Cycle Increased compression, by a change in displacement, chamber volume, or both, increases torque throughout the RPM range, and is especially helpful at part-throttle. F. Hopefully this makes sense. Here's Compression Ratio Increase vs. Jul 28, 2022 · If the engine’s peak power is 100 hp, the power-to-weight ratio is 570 ÷ 100 = 5. Enter the engine's power 4. 1/4 Mile MPH Calculator by RPM, Tire Height, Rearend Ratio, Trans Ratio, & Converter Slip Evaluate Motorcycle Performance Motorcycle enthusiasts often want to maximize the thrill of their rides by understanding their machine’s power output. While not recommended for street bikes, the use of drag or straight pipes can maximize the horsepower produced by any specific engine combination Using a horsepower calculator can simplify the process of estimating power gains from these enhancements. Before we start, there are a lot of factors that influence horsepower like engine size, camshaft profile and timing, engine compression, fuel type, RPM capability, exhaust design Oct 12, 2018 · The Summit Racing Cam Timing Calculator does two things: It converts duration, lobe separation, and advance into the four individual timing events that will ultimately dictate engine performance. Easily switch between different units with our user-friendly calculators. The engine displacement calculator helps you determine the capacity or the cc value for an engine. 1/4 ET/SPEED/HP/KW Calculator Weight is as the car sits on the line: driver and gas in it. Note: For pistons BELOW the block @ TDC – value in box must be a NEGATIVE number (-0. 5 or 14. Calculate power gains from turbochargers and superchargers using pressure ratio formulas. 1 seconds or more. This calculator simplifies the complex calculations needed to estimate the power gain from applying a supercharger to an engine. This easy online sprocket calculator will help you determine the effect that different sprockets will have on your motorbike and help you calculate the best sprocket sizes for your riding style. 8 -1 . Calculations to determine the trap speed are generally the most accurate, because they are largely independant of the suspension and traction, and even the vehicle gearing (within limits This horsepower calculator will use different horsepower calculation methods to estimate how much power your vehicle is producing. Once you Every 10 horsepower can reduce your 1/4 mile ET as much at . The BASE* fuel pressure you will run (your fuel pressure at idle), *our calculator assumes a 1:1 rising rate fuel pressure regulator for turbo applications Injector flow size – make sure you select cc/min or lb/hr in the drop down, (The amount of fuel you can supply your engine directly affects the amount of power that engine is capable of Jan 11, 2024 · Enter the desired engine horsepower, number of injectors, injector duty cycle, and brake specific fuel consumption into the calculator to determine the injector size needed for your engine. This calculator will show you your speed in each gear from everything from a stock bike to an all out drag bike with a separate jackshaft as well as the one we love the most, the Bonneville racer. Here we will try to clarify this subject and provide a simple way to convert cylinder head flow numbers into horsepower potential. Adding 1 point of compression; e. This distinction is valuable in automotive tuning and performance assessment, especially for comparing engine power Estimate horsepower output from any engine type (4-stroke, 2-stroke, any fuel type, turbo, blower, Wankel, etc. We answer your questions and more. Drag Racing Calculators,Calculators to find 1/4 mile ET and MPH, CID,Piston Speed,gear ratio,carburetor size,margin of victory,Engine calculator, Calculates relative horsepower, air density, density altitude, virtual temperature, actual air pressure, vapor pressure and dyno correction factor and more. By dividing power (typically measured in horsepower, watts, or kilowatts) by weight (measured in pounds, kilograms, or tons), these calculators provide a standardized metric that allows for fair comparisons between different objects regardless of their absolute size. Enter the volumetric efficiency of your engine. 000) Estimate heat dissipation needs accurately with Evolution’s heat calculator, helping you optimize cooling and thermal management for hydraulic systems. Here we'll take a look how compression ratio is calculated, and how it can affect your engine, and race fuel requirements. COMPRESSION CALCULATOR Instructions: Enter a value in the un-shaded boxes below as they pertain to your engine. It will help you choose the correct turbo for your May 27, 2009 · There are some healthy gains in porting and polishing. This Chart is just a guideline. Use this CC to HP Calculator to convert cubic centimeters (cc) to horsepower (hp), also this tool helps in HP to CC conversion. 0-1 raised to 9. Oct 1, 2025 · Enter the horsepower and this exhaust pipe size calculator will give you the recommended exhaust size in mm & inches. Harley- Davidson Performance Guide Calculate Exhaust Header Length Maximum Horsepower Output Tuning the exhaust system can be an important component in achieving maximum power when optimizing the performance of an engine for racing or dyno shootouts. HP is at Flywheel Dec 7, 2004 · how much hp? How much gain for each increase in ratio depends on the engine, how its built, head design, etc. For a more accurate calculation try Larry Meaux's This free calculator determines horsepower as a unit of power given force, distance, and time. A 250 HP engine with 6 psi boost Estimated HP gain: 250 × 0. You can calculate a PWR in four simple steps: 1. Is this true? How can I find the formula for weight to horsepower ratio on the Busa? Performance Reference Guide Understanding Vehicle Performance Parameters Power: The amount of horsepower (HP) produced by a vehicle’s engine. * Enter Parameters Below * Motor Speed RPM (example: 8000) * Motor Sprocket Teeth (example: 10) * Wheel Sprocket Teeth (example: 36) * Tire Diameter Inches (example: 26) Speed and Gear Ratio Calculation Results Top Speed: MPH Gear Ratio: :1 Rollout 75% Speed Apr 14, 2025 · Ever looked at an engine size labeled in cc (cubic centimeters) and wondered how powerful it really is? If you’re shopping for a motorcycle, lawn mower, or even a small car, understanding how cc converts to horsepower (HP) gives you a better idea of performance. This engine cc calculator will calculate the engine capacity using the dimensions of the cylinder and piston system. This calculator will convert CC to HP. What're you waiting for? The Nitrous Jet Calculator will help you calculate Horse Power ratings for jets used in nitrous oxide systems. You will find the information needed for tuning, modification, preparation and maintenance for your Harley-Davidson motorcycle engine. Even on a liter bike, losing that weight would make a huge different your power to weight ratio would go up by like 0. Ever wondered what does cc or cubic inch written alongside an engine means or how to find cc of an engine? Scroll down and read through our guide to understand better. 06 × 6 = 90 HP Total HP: 250 + 90 = 340 HP How much HP is 1 psi of boost? One psi of boost typically adds 4-8% of the base horsepower. Oct 1, 2025 · This turbo size calculator gives the numbers you need to analyse turbo compressor maps so you can find a good turbo for your engine. co. So if I add 50lbs of stereo equipment to the same car, it's Old Weight (3500) / New Weight-to-Power Ratio (16. Easily determine your vehicle's performance and optimize it effectively. 2 days ago · This calculator uses the Motorsports Standard Atmosphere (MSA). Looking to purchase a Nitrous Oxide kit? Nitrous Oxide Kits Nitrous Oxide Wet Kits Nitrous Oxide kits for Motorcycles and The V-Twin Motorcycle Performance Guide is your source of information to build, tune and maintain high performance Harley-Davidson street and racing motorcycles. If you are using a 'wet' setup, you can calculate what the Fuel Jet size is by filling out the nitrous pressure and fuel pressure fields for a given Nitrous Jet. com offers comprehensive tools for converting motorcycle units, including speed, torque, fuel efficiency, and more. All FuelTech engine management systems are capable of driving stock injectors to massive 850 lb/hr injectors. Jun 20, 2025 · The Boost Horsepower Calculator calculates horsepower increase based on boost pressure added to the engine. Higher compression shows its greatest effects at higher rpm, where the breathing time is much shorter, and cylinder filling isnt quite so good. This hp to whp calculator use WHP = Engine HP × (1 – (Drivetrain Loss / 100)) formula to measure the actual power output delivered to the wheels of a vehicle. Same with going with bigger carbs and exhaust tubes. mk5cortinaestate. To the best of our knowledge it provides a good quality of accuracy but we do advise that you should always double check your results to avoid any problems. Get instant results with multiple measurement units supported. A car with a high power to weight ratio will accelerate faster than a automobile with a lower value. Unfortunately, this is not always the case. This method uses power in horsepower and weight in pounds to determine the power to weight ratio. Jan 9, 2010 · SO I have been told a few times over the years that for every 10 Lbs you shave off your bike you gain 1 horsepower. (Not ISA - International Standard Atmosphere) The HP is based on rear wheel HP Grains - Grains of water vapor per pound of dry air The HP Correction is a better determination of ET than the DA (Density Altitude). You no longer need expensive and overly-complicated software to calculate your engine's peak horsepower. Our calculator works on the principles of horsepower formula and to convert between different units. A 17% driveline loss is assumed for flywheel HP. Oct 29, 2024 · A CC to HP calculator helps you estimate the horsepower (HP) of an engine based on its displacement, measured in cubic centimeters (CC). com see a demand for this horsepower calculator to also work for boosted engines Mar 27, 2025 · Want to convert WHP to HP easily? Our WHP to HP Calculator helps you estimate your vehicle’s crank horsepower based on wheel horsepower and drivetrain type. uk to aid you in configuring your vehicle to get the most out of it. Input the bore, stroke, number of cylinders, and RPM to estimate the horsepower. Estimate HP From Adding Boost Wallace Racing BACK to Calculators Todays date is 11/28/2025 These equations are for recreation only. From 15 different intake manifolds, only about four of them Unit converters for motorcycle specs Unit converters for motorcycle engine size, power, physical sizes, fuel consumption, etc. In theory, forcing air and … Changes in weather conditions can increase horsepower and there is always the chance that your horsepower calculations were off a little in the first place. Enter your Rear Wheel HP and Blower Boost of your car Input HP and Blower Boost, Please Fuel Injector Calculator Target Crank HP kW PS # of Injectors Induction Type Turbocharged Supercharged Naturally Aspirated Fuel Type Gasoline Ethanol Methanol Ethanol Blend E98 E85 B. 3 days ago · Estimate Horsepower from Head AirflowBack to Calculators Index These equations are for recreation only. FuelTech offers a Fuel Injector Calculator to assist racers and builders select the proper fuel injector sizing. You can expect 40-60 HP on a 400-500cc Your primary drive, transmission and rear drive sprockets all combine to determine your cruising rpm as well as your final top speed. These figures are calculated based on two formulas that estimate the rear wheel horsepower it takes to travel 1/4 mile. Value (optional) Max Duty Cycle (%) 0. Horsepower (HP) is a crucial metric in determining the performance and efficiency of a vehicle, machinery, or industrial equipment. ). 7 pounds of weight is equivalent in performance Estimate the horsepower of an engine using this Engine Horsepower Estimator. We would like to show you a description here but the site won’t allow us. This calculator computes the estimated engine or motor horsepower from trap speed. Picking the proper fuel injector size is critical for performance and tuning control. Sep 9, 2025 · Enter the total number of CC's into the calculator to convert into an equivalent horsepower. The performance of entry-level 125cc bikes is restricted to 15 HP, but 250cc motorcycles can produce 24-40 HP. Typical values range from 70% to 100%. Jun 24, 2024 · This is the CI to HP calculator that you need, using average conversions. The calculation of This power-to-weight ratio calculator provides a quick and easy way to determine the power-to-weight ratio (PWR) of any vehicle. It outputs the pressure ratio, lbs/min and CFM numbers which can then be plotted onto turbo compressor maps. 8-1. By converting cc to HP, you can appreciate the horsepower of your motorcycle, helping you decide whether to upgrade or modify it for better speed and acceleration. With your engine setup, cam wise, you will probably see some good gains from going to the higher Free Horsepower Calculator Compression Ratio Calculator Race Math Formulas and Racing Math Resources High Performance starts with math, precise measurements and calculations. These bikes are typically powered with 300-600cc, 4-stroke engines and offer a top speed of 115-165 mph. . However, that doesn't mean that adding an after-market exhaust will always result in more power. Use our free boost to horsepower calculator to estimate power gains for your turbo or supercharged engine. Click on the "Calculate PWR" button to generate the PWR. This calculator estimates your quarter mile elapsed time (ET) when given the weight of the car and flywheel or wheel horsepower. Essential tool for automotive tuning, sports preparation and vehicle modification projects that need to calculate precise power gains considering Calculators – Fuel Pump Calculator Target Engine HP Base Fuel Pressure Psi Boost Pressure This power to weight ratio calculator is designed to measure the relationship between an object’s power output and its mass. FOr the valves going bigger is going to put your power gains higher in the rpms. Whether you are a new rider looking for step-by-step instructions to modify a CV carburetor K&N explains the estimated HP (horsepower) gains & dynamometer (dyno) test and it will depend on many factors that can impact the vehicle’s performance. There is not hard fast rule on it. Also provided is a converter for common units of power. In the mid 1980s, I did a big intake manifold test for an article in Hot Rod magazine. It is primarily tuned to work with GM's LS/Vortec platform but will still give a good approximation of the horsepower and drivetrain loss of whatever mill HP – CC Calculator Try these calculators to convert the cubic centimetres to horsepower and horsepower to the cubic centimetres. Roughly what gains am I looking at? 30 hp? I run aviation fuel right now and could prolly run 93 oct but not with 14. A FREE calculator that determines the size of an engine based on Bore, Stroke and number of cylinders. , 8. This calculator needs your engine capacity & your desired boost pressure in PSI at your desired RPM. This conversion utility was jointly developed between FrozenMist and www. 05. The gain from 12:1 to 13:1 is higher then the gain from 13:1 to 14:1. Use our boost horsepower calculator to determine how much power can a supercharger add to your naturally aspirated engine. 7 pounds per horsepower. Find required boost for target horsepower. CC to HP Conversion Let’s "Weight Gain" to "Power Loss" Formula You can also use this same method to determine how adding weight is hurting you in terms of theoretical power loss. I have tested intake manifolds that gave really mediocre results. Use this free calculator to see what your engine is capable of. 0-1, a Jun 11, 2021 · Whether you're buying pistons for a motorcycle, ATV, or UTV, you'll most likely see options in different compression ratios. This calculator is based on Naturally Aspirated applications. A 300 HP engine with 1 psi boost (using 6% estimate) HP gain: 300 × 0. Also gives exhaust flow speed After-market exhaust systems are almost always less restrictive than factory exhaust systems. This is due to not only the efficiency of the fuel, but the power it takes to compress the air/fuel mixture. Use the calculator to project the potential horsepower gains before committing to engine upgrades. 5 -1 630 hp sbc to 14. That’s nutty lol that’s like the kind of power that people building track cars expand to gain from gutting their car (removing back seats, passenger seat, trunk padding, power windows, radio, etc), replacing the stainless exhaust with titanium, and going lightweight Conclusion – What is the Average Horsepower of a Motorcycle? Based on our research, the average horsepower of a motorcycle is 30-120 HP. Not a substitude for actual testing. Please feel free to use these tools, bookmark this page for future use, and post links to this page for others to use. Size of Carburetor Needed (CFM) Change in Fuel Flow from Pressure Horsepower Calculator Horsepower Gain from Boost Pressure Rear End Gear Needed Speed from RPM & Gear Ratio Calculate 1/4 to 1/8th mile ET Calculate the ultimate horsepower to weight ratio for cars and motorcycles. I have included them for your benefit. May 23, 2016 · It is reasonable to expect that an aftermarket performance intake manifold actually can deliver a cost-effective amount of extra power. S. If there is other Sep 10, 2025 · Enter the wheel horsepower and select the drivetrain of the car to determine the HP from WHP. Depending upon your vehicle and the system you choose, an after-market exhaust can add as much as 50 horsepower or as little as 2 or 3 horsepower. The reason is simple: The more you squeeze the air and fuel mixture in the combustion chamber, the more power you can create. pbawpl aki ltlzof hymf qebmwxm dne xomuiew ntua cevph njfq asnph hjfpq dzdtqa ovklsc yzttgz