dearJulius.com

Horsepower Versus Torque: Who Is Right?

© Provided by Bonnier Corporation   Cycle World

By Kevin Cameron, Cycle World

Our readers are talking about two different things.

Torque and "torquey" have two very different meanings. Torque is a physical measurement with a precise definition. But when riders say a particular bike feels torquey, what they mean is not that it produces high torque on a dyno, but that its engine can accelerate the bike strongly at almost any rpm in its operating range.

The opposite of torquey is peaky, which means instead of having torque uniformly distributed across its operating range, its best torque exists only at higher rpm, where it can make a lot of horsepower. When you ride a peaky bike in its midrange or low-end, snapping the throttle open gets you only moderate torque, resulting in weak acceleration. But if you tap down two gears, putting the engine up at 9,000 to 10,000 rpm, the bike rockets forward because now it is operating up where it makes its best torque.

The result is that if two bikes—let's say a Harley-Davidson Big Twin and a Suzuki GSX-R1000—make a top-gear roll-on from 3,000 rpm, the Harley pulls smartly ahead until the Suzuki can rev up into its rpm range of best torque, at which point it evens the score and then pulls away rapidly.

These two kinds of engines represent the achievement of different goals by differently slanted compromises.

A touring or cruiser engine needs strong torque at low rpm to start and accelerate a heavy bike, so it is given quite short valve timings with almost no (or in some cases, negative) valve overlap. Such short timings run out of breath as the engine revs up, but because nobody tours or cruises at 150 mph or tries to break 10 seconds in the quarter-mile, it doesn't matter. It's a compromise. The touring rider needs and likes bottom torque and doesn't mind if the engine runs out of breath as it nears its peak rpm of 5,500.

A peaky engine results from the longer valve timings that can continue to fill cylinders well at higher rpm, such as 12,000. Short valve timings close the intakes before the cylinders have had time to fill at higher rpm, causing an engine to run out of breath. To overcome this, intake closing is delayed after bottom dead center for 50 or 60 degrees, and the intakes are made to begin opening 20 or more degrees before top center. At low and mid rpm, this late intake closing allows the rising piston to pump back out some of the intake charge it has just taken in, reducing torque at those engine speeds.

At higher rpm, this pump back does not occur because intake velocity is then high enough to just keep coasting into the cylinders even though the piston is rising on compression. As a result, peak torque is moved to higher rpm. It’s a compromise: giving away bottom-end and midrange to move the torque to high rpm where it becomes high horsepower.

In physical terms, torque is a force, tending to rotate something around an axis. It is measured as a force—ounces, pounds, kilograms—acting on a lever arm of a specified length (inches, feet, meters). This gives us the familiar pounds-feet or kilogram-meters in which torque is specified in manufacturer brochures or road tests.

When Cycle World tests a bike on its dyno, the results are presented in the form of two curves on a graph—one for horsepower, the other for torque.

© Ducati   Big speed requires big power: Ducati and Honda MotoGP bikes ridden by (from left to right) Andrea Dovizioso, Marc Márquez, and race winner Danilo Petrucci surpassed 215 mph this past June on Mugello’s 1,100-meter-long front straight.

The ideal toward which all manufacturers strive is to have high torque, constant over a wide range of rpm, resulting in a nearly horizontal line on the graph. Indian’s dirt-track racing engine, the FTR750, achieves this—flat, constant torque—from 7,000 to 11,000 rpm. Because horsepower is just (torque x rpm)/5252, the horsepower curve resulting from this flat torque is a sloping straight line, rising from left to right.

Real life is not ideal, so actual torque varies because such things as intake and exhaust-pipe resonance and airbox effects exist. They cause local variations in the height of the torque curve. In the case of a traditional touring or cruiser engine, the torque rises to a useful amount at as low as 1,200 rpm, peaks somewhere in the usual range of 2,500 to 3,000, and then slopes gently downward after that. Why? This is the “running out of breath” effect mentioned earlier. As the engine revs up, there is less and less time for cylinder filling, so the short valve timing and moderate port sizes of such engines cause cylinder filling to become less and less complete as the engine revs up, so torque falls.

COMMENTS




Made with in NYC
Name

4th of July,7,Abu Dhabi,2,Accessories,234,Acne,13,Adventure,32,Adventure Travel,638,Advice,255,Africa,26,African Food,2,AIDS,1,Air Travel,150,Alabama,5,Alaska,20,Alberta,1,Alcohol,4,All About Beer,1,All About Wine,2,Alternative Treatments,4,America,77,American Food,5,Amsterdam,2,Android,11,Anguilla,3,Animal,367,Animal Health,1,Animals,103,Anniversary,1,Anniversary Cake,11,Antarctica,7,Anti-aging,49,Antigua,3,Appetizers & Snacks,2,Apple,11,Apps,16,Argentina,15,Arizona,19,Arkansas,2,Armenia,1,Asia Travel,47,Asian Food,7,Asthma,4,Athens,3,Austin,8,Australia,92,Australian Food,1,Austria,13,Autism,1,Auto Insurance,1,Auto Show,52,Autos,291,Azerbaijan,1,Baby Shower Cake,29,Back Pain,25,Bags,10,Bahamas,13,Balance Work & Life,50,Banana Cakes,2,Bangladesh,8,Barn Finds,1,Bathroom,43,Be a Better Manager,33,Beach Travel,58,Beaded Dress,2,Beards and Shaving,29,Beauty,1888,Beauty & Style,35,Beef Recipes,7,Belarus,1,Belgium,9,Belize,15,Bermuda,5,Best Products,17,Better Partner,7,Beverages,3,Bhutan,9,Bills to Pay,35,Birds,4,Birth Control,1,Birthday Cake,109,Blue Lagoon,2,Blueberry Cake,11,Bolivia,3,Books,1,Botswana,3,Brazil,38,Bread,11,Breads,1,Break Room,12,Breakfast & Brunch,6,Breakup,5,Breakups,3,breast,1,Breasts,69,Broken Hearts,1,Brownie,8,Brunei,1,Budget Travel,97,Bundt Cake,30,Business Skills,102,Butter Cake,52,Buying,1,By Region,3,Cake Decorating,113,Cakes,54,California,109,Cambodia,4,Camera,6,Canada,80,Cancer,73,Car Shows,1,Car Tech,2,Caramel Cake,5,Career,162,Career Advice,298,Career Choice,125,Career Growth,180,Career Paths,24,Career Problem,8,Caribbean,45,Caribbean & Mexico,5,Carrot Cake,22,Cats,49,Celebrity,17,Celebrity Dress,2,Celebs,1,Ceremonial Cake,9,Certified Pre-Owned Vehicles,1,Cheese Recipes,4,Cheesecakes,251,Chicago,7,Chicago Auto Show,2,Chicken Recipes,14,Chiffon Cake,5,Children's Health,21,Chile,7,China,21,Chocolate Cake,395,Christmas,35,Christmas Cake,23,Christmas Travel,14,Classic Cars,39,Cleaning Tips,144,Clinical Practice,1,Clothes,1,Cocktail Recipes,2,Coconut Cake,21,Coffee,1,Coffee Cake,15,Coliseum,1,Colombia,18,Colorado,32,Columbia,3,Companies,2,Compassion,1,Computing,16,Connecticut,4,Consumer Electronics Show,5,Cookies,10,Cooking,8,Corporate Travel,2,Costa Rica,13,Country Travel,249,Creative,309,Creative Idea,22,Creative Ideas,37,Croatia,15,Cruiser Travel,16,Cuba,18,Cultural Travel,66,Cupcake,322,Customs & Classics,2,Czech Republic,6,D.C.,2,Dandruff,1,Dating,8,Dating Advice,31,Dating Advice for Women,1,Dating Tips,4,Decor,23,Decorating Ideas,181,Delaware,1,Demotivational,636,Denmark,12,Dental Health,26,Dentistry,1,Depression,24,Desert Travel,1,Desserts,3,Detroit Auto Show,4,Diabetes,25,Diet,131,Dining Out,3,Dinner,14,Disease,116,Divorce,12,DIY,112,DIY Fashion,34,Dogs,156,Doughnuts,5,Dress,29,Drink,27,Drinks,1,Drinks & Cocktails,4,Driving,3,Drugs,3,Dubai,15,Ears,2,East Africa,4,Easter,1,Easter Island,1,Easter Travel,1,Eco Travel,18,Ecuador,7,Education,87,Eggs,3,Egypt,4,Electronics,4,Electronics and Gadgets,2,Emirates,1,England,13,Entertainment,148,Enthusiasts,131,Entrepreneurship,40,Estonia,2,Eswatini,1,Ethiopia,2,Europe,110,European Food,8,Exercises,51,Eye,300,Eye Health,28,Eyebrow,56,Eyelash,20,Face,54,Facts,284,Fall Travel,43,Family,16,Family Travel,128,Faroe Island,1,Fashion,395,Fashion for Kids,2,Fashion for Man,12,Fashion for Woman,31,Fat Loss,91,Father's Day Cake,4,Father's Day Travel,1,Featured,212,Features,1913,Fertility,2,Festival Travel,25,Fiji,6,Finance,12,Finland,16,Fish & Seafood,13,Fitness,1177,Fitness & Exercise,219,Florida,69,Food,165,Food and Drink,14,Food Recipes,7,France,37,Frankfurt Motor Show,2,Free Travel,3,French,6,French Polynesia,5,Friendship,17,Fruit & Veggie Recipes,8,Fruitcake,70,Fruits,4,Fuel Economy,1,Fun,42,Funny,546,Gadgets,31,Galapagos,3,Games,12,Garden,24,Gardening,276,Gearheads,1,General,7,Geneva Motor Show,3,Georgia,14,Germany,18,Get Healthy,63,Ghana,2,Google,15,Graduation Cake,2,Gratitude,1,Greece,37,Green Living,5,Greenland,1,Grooming,89,Guatemala,2,Hair,1264,Hair Care,317,Hair Color,299,Hairstyle,65,Hairstyles,855,Halloween,41,Halloween Cake,12,Halloween Travel,9,Happiness,16,Hawaii,53,Hayden Panettiere,1,Headache,22,Health,845,Health & Fitness,300,Health Care,491,Health Insurance,1,Healthcare Tech,6,Healthy,12,Healthy Drinks,31,Healthy Eating,186,Healthy Habits,159,Healthy Living,345,Hearing,1,Hiking Travel,63,HIV/AIDS,4,Holiday Travel,28,Holland,1,home,31,Home & Garden,205,Home and Decor,483,Honeymoon Travel,128,Hong Kong,13,Horoscope,31,Hot Rod Power Tour,1,Hotels,71,Housekeeper,8,Hungary,3,Ice cream Cake,21,Iceland,41,Idaho,4,Ideas,11,Illinois,13,Imports,1,Impress a Girl,3,Impress Women,4,Independence Day Travel,1,India,36,Indiana,5,Indonesia,13,Indoor Gardening,69,Industry,5,Inspiration,58,Insurance,5,Internet,19,Internship,8,Interview Skills,37,Investing,12,iPad,2,iPhone,6,Iraq,1,Ireland,36,Island,60,islands,2,Israel,9,Italy,56,Jamaica,8,Japan,44,Jewelry,13,Job Search,47,Jordan,6,Just For Fun,2,Kansas,6,Kentucky,2,Kenya,2,Kids,1,Kids & Pets,10,Kitchen,67,Koala,1,Korea,2,Kyrgyzstan,1,Lamb,2,Laptops,4,Latin America,3,Latin American Food,1,Latvia,1,Laundry,6,Layer Cake,95,Leadership,44,Legs,1,Lemon Cake,18,Life,1,Life Hacks,273,LifeStyle,894,Lips,134,Lithuania,2,London,24,Long Distance Relationship,1,Los Angeles Auto Show,14,Louisiana,9,Love,80,Lowa,4,Lunch,5,Luxembourg,1,Luxury Travel,35,Maine,6,Maintenance,3,Makeup,608,Makeup & Beauty,11,Makeup Tips,77,Malaysia,1,Maldives,15,Malta,2,Mango Cake,3,Manicure,10,Marketing,10,Markets,11,Marriage,81,Marshmallow,3,Maryland,6,Massachusetts,9,Massage,5,Mauritius,6,Meditation,35,Men & Women,18,Men's Health,14,Menstruation,21,Mental Health,302,Mexico,74,Miami,13,Michigan,5,Microsoft,6,Middle Eastern Food,2,Mind,3,Mississippi,2,Missouri,7,Mobile,22,Moldova,1,Monaco,1,Money & Career,21,Monkey,1,Montana,12,Morocco,20,Mother's Day Travel,1,Motherhood,16,Motivation,2,Motorcycles,106,Motorsports,2,Mousse,2,Muffins,9,Mug Cake,14,Multiple Sclerosis,1,Muscle Cars,4,Muscle Cars & Hot Rods,3,Muscle Gain,2,Myanmar,9,Nail Art,195,Nails,252,Namibia,4,Nature,4,Nature Travel,102,Nepal,6,Netherlands,11,Nevada,23,Nevis,1,New Bikes,2,New Car Deals,1,New England,5,New Jersey,2,New Mexico,6,New Year Fashion,6,New Year's Day Travel,6,New York,55,New York Auto Show,3,New York City,20,New Zealand,47,Newfoundland,1,Newlyweds,1,News,334,Nicaragua,2,North America,11,North Carolina,6,North Dakota,1,North Ireland,1,Northern Ireland,1,Norway,20,Nutrition,447,Occasional Travel,9,Oceania,1,Offbeat,648,Ohio,6,Oman,5,Online Date Tips,1,Operating Systems,2,Oral,4,Oregon,10,outdoor,3,Outfits,166,Ownership,61,Pain,24,Painting,16,Pakistan,2,Panama,5,Pancake,19,Panda,1,Panna Cotta,3,Paraguay,1,Parenting,370,Paris,23,Paris Motor Show,4,Pasta,2,Pastry,7,Pebble Beach Concours d'Elegance,2,Pedicure,4,Penguin,4,Pennsylvania,10,People & Places,88,Perfumes,14,Personal Finance,164,Peru,21,Pets,172,Phoenix,1,Photo Feature,1,Pie,27,Pimple,3,Plum Cake,1,Poke Cake,10,Poland,3,Popular Ingredients,26,Pork Recipes,7,Portable Media,14,Portugal,21,Pound Cake,55,Prague,1,Pregnancy,112,Premium,1,Printer,2,Protein Bars,1,Psychology,1,Pudding,9,Puerto Rico,7,Pumpkin Cake,45,Qatar,6,Quick & Easy Recipes,11,Real Estate,72,Recalls,4,Recipe,1098,Recipes,52,Recipes & Meal Ideas,3,Recipes By Course,5,Relationship,137,Relationship Advice,70,Relationship Advice for Men,1,Relationship Advice for Women,5,Relationship Problems,23,Relationship Secrets,6,Relationships,53,Research,94,Resort,11,Restaurants & News,13,Resume,11,Retirement,10,Reviews,1,Rhode Island,2,River Travel,2,Road Trips,49,Romania,4,Romantic Getaways,15,Rome,5,Russia,16,Safety,5,Saint Lucia,1,Saint Patrick's Day Travel,1,Salad,6,San Miguel de Allende,1,Science & Tech,66,Scotland,10,Seasonal,56,Seasonal Travel,59,Security,9,Self Help,14,Self-Care,3,SEMA Show,5,Sex,7,Sexual Health,19,Shanghai Auto Show,7,Shaving,1,Sheet Cake,20,Shirt,4,Shoes,29,Shopping,10,Shots & Shooters,1,Side Dishes,4,Sightseeing Tours,2,Singapore,18,Ski Resorts,10,Skin,429,Skin Caare,1,Skin Care,609,Sleep,62,Slovenia,6,Small Business,163,Smartphone,28,Smile,1,Smoothies & Juices,3,Snacks,1,Social Media,44,Solo Travel,24,Solomon Islands,1,Somoa,1,Soth Africa,1,South Africa,14,South America,3,South Carolina,4,South Dakota,5,South Korea,3,South Pacific,2,Space Travel,14,Spain,33,Special,30,Special Cake,579,Special Feature,113,Special Features,448,Sponge Cake,15,Sports,22,Sports and Exotics,4,Sports Cars,8,Spring Travel,23,Squirrel,1,Sri Lanka,6,Strawberry Cake,22,Street Fashion,8,Stress Relief,35,Stroke,2,Student Travel,1,Style Guide,25,Summer Travel,53,Summer Vacation,8,Supercars,10,Sweden,19,Swiss Alps,1,Switzerland,20,Tahiti,1,Taiwan,3,Tanzania,1,Tarts,12,Tattoos,81,Taxes,7,Teas,2,Tech,89,Tech Advice,12,Tech Education,7,Tech Hacks,19,Tech Updates,2,Technology,13,Teen Advice,1,Teeth,5,Tennessee,6,Texas,57,Thailand,31,Thanksgiving Cake,4,Thanksgiving Travel,5,Therapy,3,Things to Do,165,Tibet,2,Tips,259,Tips & Tricks,6,Tokyo Motor Show,2,Tools & Skills,16,Top Stocks,1,Top Stories,1,Traditional Cake,4,Train Travel,23,Training,1,Transportation,22,Travel,223,Travel Advice,64,Travel Apps,1,Travel Guide,40,Travel Tips,149,Trends,7,Trucks,1,True Health,5,Tunisia,2,Turkey,10,Turkish,1,Tuscany,1,TV,2,UAE,10,UK,40,Ukrine,1,Understanding Women,9,Urban Travel,47,Uruguary,1,USA,629,Utah,12,Uzbekistan,1,Vacation Travel,245,Valentine's Day Cake,7,Valentine's Day Travel,1,Vanilla Cake,17,Vegetables,3,Vehicle Travel,2,Venezuela,1,Vermont,4,Victoria Falls,1,Video,5,Vietnam,5,Virginia,5,Waffles,3,Washington,15,Washington DC,20,Waxing,19,Web & Social,17,Wedding,73,Wedding Cake,549,Wedding Dress,30,Weddings,39,Weddings Travel,4,wei,1,Weight Gain,29,Weight Loss,755,Weird,172,Wellness,193,West Indies,2,Wi-Fi,2,Wildlife Travel,13,Winter Travel,56,Wisconsin,5,Women Lifestyle,23,Women's,118,Women's Health,173,Work Environment,77,Workout,8,Workouts,81,Worldwide,155,Wyoming,2,xxx,1,Yemen,1,Yoga,85,YouTube,3,Zadar,2,Zambia,3,Zimbabwe,4,
ltr
item
News: Horsepower Versus Torque: Who Is Right?
Horsepower Versus Torque: Who Is Right?
https://1.bp.blogspot.com/-g7mcFvXRAyg/XbvKPX-MkbI/AAAAAAABVrA/JOan6HBqBBY6eH3qyDvo3pLQnUTkEM93QCLcBGAsYHQ/s1600/1.jpg
https://1.bp.blogspot.com/-g7mcFvXRAyg/XbvKPX-MkbI/AAAAAAABVrA/JOan6HBqBBY6eH3qyDvo3pLQnUTkEM93QCLcBGAsYHQ/s72-c/1.jpg
News
https://news.dearjulius.com/2019/11/horsepower-versus-torque-who-is-right.html
https://news.dearjulius.com/
https://news.dearjulius.com/
https://news.dearjulius.com/2019/11/horsepower-versus-torque-who-is-right.html
true
637333457269776417
UTF-8
Loaded All Posts Not found any posts VIEW ALL Read More Reply Cancel reply Delete By Home PAGES POSTS View All RECOMMENDED FOR YOU LABEL ARCHIVE SEARCH ALL POSTS Not found any post match with your request Back Home Sunday Monday Tuesday Wednesday Thursday Friday Saturday Sun Mon Tue Wed Thu Fri Sat January February March April May June July August September October November December Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec just now 1 minute ago $$1$$ minutes ago 1 hour ago $$1$$ hours ago Yesterday $$1$$ days ago $$1$$ weeks ago more than 5 weeks ago Followers Follow THIS PREMIUM CONTENT IS LOCKED STEP 1: Share to a social network STEP 2: Click the link on your social network Copy All Code Select All Code All codes were copied to your clipboard Can not copy the codes / texts, please press [CTRL]+[C] (or CMD+C with Mac) to copy