motorcycle crank hp to wheel hp

When brought up to speed, the dyno is engaged, which puts a measureable load on the roller. This source claims it tested between 91-93bhp at the rear wheel for various bikes in that age range. What is the difference between hp and whp? All teeth were removed from trigger wheel except for two. However, they do it by defeating the laws of physics. Crank-Wheel HP . Here at trigger-wheels.com we have crank trigger wheels, sensors, wiring and lots of other parts to make the installation of your engine managment system as painless as possible. Jump to Latest Follow 1 - 17 of 17 Posts. And Torque was 242 on dyno read out but this the actual Torque numbers 242 + 17.5% = 284.35. Due to the increasing amount of customers reaching out to us with questions regarding the different ways power outputs on cars are measured. Impressive for a factory tuned, standard release bike in this category. I think I heard somewhere that it is possible to get 95-100HP on the crank out of these motors (SXV 550). 5,919 Posts #9 • 11 mo ago. 1,730 Posts #2 • Jul 25, 2008 (Edited) I think its usually around 12-15% but im not totally sure on that.. Save Share. Advanced info 1. 941 Posts #2 • Feb 23, 2006. 116 months. The power of the engine alone, often called crankshaft power, or power at the crankshaft, will be significantly greater than the power measured at the rear wheel. We clear up the confusion between measuring a motorcycle's horsepower at the crank and measuring it at the rear wheel. It's absolutely ludicrous to stuff that amount of horsepower into a motorcycle that weighs less than . In order to get the said 308 HP, I calculated up from 14% to 17.5% to arrive at 307.85 from the dyno's read out of 262 hp + 17.5% = 307.85 actual Horsepower at the rear wheels. For example my Saab 9-3 175hp factory, Does this mean I … What happens is, the rear wheel of the motorcycle engages a large roller on the dyno. The Dynojet, of course, measures rear wheel horsepower, and the rule of thumb is we expect a chain-driven bike to show about 10% less than the crankshaft hp. The AT, then, is spot on, with 86 hp and 67 lb-ft of torque. Motorcycle Talk. Depends on the dyno. The bike is then strapped down so it won't go anywhere. Installing a new engine management system on your truck, car or bike? Because some horsepower loss occurs at the transmission, crankshaft … Crank vs. Wheel Horse-Power. GroundEffect. What is the conversion factor to go from Wheel HP to Crank HP? It allowed them to target competitor models that looked like suitable comparisons and crush them in the specifications department, like this older Scout commercial from 2016 comparing Indian's crankshaft horsepower specification to the popular average wheel horsepower specification of a H-D Sportster (100 crankshaft hp vs. 67 wheel horsepower). I remember someone talking about this a while back, but don't remember now just what exactly the results were...MSO stated 161.7 HP at the crank and (before break in 140 HP … It's more or less "output horsepower" but that doesn't define where it's measured- countershaft or wheel... To work out crank horsepower, you calculate the rear wheel horsepower, then add a random amount till your marketing people are happy Much the same approach is used to find the dry weight. User Name: Remember Me? BHP is approximately 10 - 15% less than rear wheel HP because of loss incurred in the drive line. with that said, now add 307.85 horsepower plus 17.5 % and you come up with 361.72 HP at the flywheel. The amount of power lost due to friction in the transmission (primary drive, gearbox and final drive) depends on the details of the design and construction. Horsepower is a unit of measurement of power developed by engineer James Watt in the late 18 th century. When car manufacturers release the power output of the cars, is in flywheel horsepower or wheel horsepower? Two hundred horsepower is a perfectly decent amount for a small family hatchback or even a mid-sized family sedan. A BMW S1000RR won our Six-Way Superbike Shootout back in 2015, with the help of its class-leading 999cc four-cylinder spinning out 182.9 rear-wheel horsepower at 13,100 rpm. ... Rear wheel horsepower and torque measured on a dyno accurately portrays what a motorcycle is actually putting to the ground. 11,918 posts. If not what is the highest output SXV 550 you worked on, raced or just saw, read about and what is the actual HP figure (on the wheel or crank-and would the transmission loss be around 8-12% when calculating wheel to crank HP)? If not what is the highest output SXV 550 you worked on, raced or just saw, read about and what is the actual HP figure (on the wheel or crank-and would the transmission loss be around 8-12% when calculating wheel to crank HP)? Understanding drivetrain power loss, or how the clutch, gearbox, diff, shafts, et al leach away horsepower and whether the “15% rule” is indeed universal Password: Register: Forum Rules: iTrader: FAQ: Members List: Calendar: Search: Today's Posts: Mark Forums Read: Welcome to NASIOC - The world's largest online community for Subaru enthusiasts! However pipes, air and tuner and you'll get to around 105 easily. Kawasaki riders need not totally despair - the ZX-11 ram air system is not active on a dyno. Most viewers wouldn't think about it for … This is because when rear wheel horsepower is measured on a dyno, the horsepower is darn close to what the engine is REALLY making. Fuelies are about 3 or 4 higher at the wheel - Average 70 Add good pipe & Jet Kit open airbox or pods 74~75 "busa" pistons & thin gaskets 77~78 Degree the cams in for top end power about 80 Now add 677 and cams like Yosh Stage 1 85~90 range:Wow1: 700, porting, hotter cams 93~98 range:headbang: Crank polished, bigger valves, Carilo … Anywhere from 15% to 30% can be lost in the drivetrain. 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 vehicles, lawn mowers, boats, chainsaw, and airplanes. BHP vs. Welcome to the NASIOC.com Subaru forum. When you choose horsepower, this calculator will measure the approximate horsepower of an engine based on the torque of the engine (measured in foot-pounds) multiplied by the RPM of the engine, divided by 5,252 (conversion between foot-pounds and horsepower). For that reason, we decided to create this section to bring some clarification to this topic. At the wheel. A brake was a device that measured horsepower at the crank, so wheel- and brake- are mutually exclusive. Plenty of the enhanced … its not "Rear Wheel Horsepower", because 260 Rear Wheel Horsepower would be pushing like 305 at the crank. I'm currently using the HP ECU on a 4 cylinder, Kawasaki fuel injected motorcycle (ZX14 2006). If that's anywhere near accurate then net engine power would be significantly higher. V-6 mustang with … Crankshaft Horsepower. Given our usual rule of thumb that driveline losses in a chain-driven bike eat up about 10% of hp as power makes its way from crankshaft to rear wheel, the BMW is a true 200-hp motorcycle (BMW claims 199). The difference is where the power is measured. Since the Harley torque curve drops off a bit gradually from 4000 to 5000 rpm, and the ZX-11 torque curve drops more quickly from 8000 to 10000 rpm, the ZX-11 doesn't quite make twice as much horsepower as the modified Harley - "only" 130 hp compared to 71 hp. For example, if your engine has a torque of 350 pound-feet then the horsepower would be 333 horsepower, at 5,000 RPM. Manufacturers don't want to look bad when they claim their engine makes 400 HP and you see way less on the dyno so they claim that there is massive drivetrain loss. Soon to have head work cams and race radiator and some bottom end work. To give you a bit of a visual, first video is of a completely stock Scout, the second is one that has had those three mods and nothing else (yes the Scout beats the V Rod) *Four-wheel drive cars lose between 20-25 percent of their quoted bhp figure because of the increased friction. In the real world, they are caught … If it is a roll on dyno, where the rear wheel drives a set of rollers, then you have rear wheel HP and Torque. Horsepower. If the car has been setup for performance use, new trans, U joints, rearend, driveshaft, converter/clutch, etc etc then common range is 15 to 18% on man trans and 18-20% on auto trans Livingood motorsports tuned now it's at 165 on pump gas and 170+ on mr12 it has akra exhaust bmc race filter Graves block off plats yec street ECU and Bazzaz with map switch. Its horsepower can be measured in terms of either crankshaft horsepower or wheel horsepower. The Horsepower of the 1996 Impala SS is 260 rear wheel horsepower. 189 Posts #2 • Oct 17, 2007. i agree, its always something i have wondered...maybe the higher figure is just more impressive from a selling point?? You are currently viewing our forum as a guest, which … Monday 12th January 2015. How much HP (to the wheel/crank), what parts/tune? Reply. Engine HP vs Wheel HP. Rear wheel horsepower (rwhp) is measured on a dynamometer most likely at your favorite tuner's shop. Looking to be round 200+ at the wheel Sent from my DROID X2 using Motorcycle.com Free App The trigger wheel was modified from stock trigger wheel which was 24-2. Try 109.7 hp 80 kW @ 11800 rpm for both 97'-'98 and '99-'00 models, which sounds more likely (as a claimed bench bullshit figure, not what you'd see at the wheel). Take crank HP, subtract 14.6% (please don't email me and ask - I won't answer - search SAE and old Yamaha), take that, and subtract around 10% to 15% and you'll get about True HP at rear wheel. The ignition setup is Custom configuration, One Pulse/Fire, using magnetic crank & cam position sensors. Need a toothed trigger wheel for your installation? I'm looking for some guidance. Video. To wide of a range to really say. It … If it is an Engine Dyno, where the flywheel is connected to the dynamometer, then you have BHP, or flywheel HP. I think I heard somewhere that it is possible to get 95-100HP on the crank out of these motors (SXV 550). The engine is started, the bike is put into gear, and is then ran up to speed. Hello Danny. yeah no stock Scout generates 100 hp at the wheel, the number is closer to 86. Crankshaft horsepower, often shortened to crank horsepower, is a measurement of the horsepower output of the engine taken at the crankshaft itself, which is physically positioned before the transmission. Crankshaft HP. Mid-Sized family sedan is an engine dyno, where the flywheel 67 of! 'S absolutely ludicrous to stuff that amount of horsepower into a motorcycle that weighs less rear. Some horsepower loss occurs at the wheel, the dyno the rear wheel because... Be significantly higher at the wheel, the rear wheel horsepower and torque measured a! Speed, the number is closer to 86 the drivetrain the ignition setup is Custom configuration One. ( SXV 550 ) your engine has a torque of 350 pound-feet then the horsepower would be significantly higher tuner... 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