Torque or HP
Senior Member
Joined: Aug 2006
Posts: 1,159
From:
RE: Torque or HP
Sortof but not quite. unfortunatly with an engine it isn't that cut and dry. you can't have one without the other and there are many ways to create HP from Low torque high Redline to Low redline high Torque. There are also many other factors involved. And as i said before
Holding everything else constant. A car with Higher HP will accelerate faster regardless of it having higher torque.
Holding everything else constant. A car with Higher HP will accelerate faster regardless of it having higher torque.
1st Gear
Joined: Sep 2006
Posts: 268
From: Westchester, NY
RE: Torque or HP
if you want to look at it in a real world perspective, built honda civics have a lot of hp(no whiplash) but no torque. A diesel truck usually has relatively low hp but a lot of torque(but they can pull houses down.
2nd Gear
Joined: Aug 2006
Posts: 1,340
From:
RE: Torque or HP
Bondga:
horse power and torque are direcally praportional, and constant. if a car has 30 foot pounts of torque at 5252 RPM, it MUST HAVE 300 horsepower at 5252 rpm. the reason ricers can have high horsepower and very little torque is becuase they rev verry high. Any RPM above 5252 will have higher horsepower than torque. Muscle cars can have a **** load of torque, and just a lot of HP becuawe they start producing their torque at a very low RPM. Hence them being super fast off the line.
And for the really long complex thing above, here is a simplified version
If something has 20 lbs of torque, basically that means that if you have a bar mounted on an axis, such as the minure or hour hand of a clock, and the bar is 1 foot long, it can turn or stay still with up to 20 pounds on the end. or you cna have a 20 foot bar with 1 pound on the end. That is why having big wheels hurts your acceleration. larder radius (longer bar) means less force on the outside. to deal with that, gear it lower. in an ideal world with no friction and massless gears and wheels, it wouldnt matter. but if you have big wheels, you lose power spinning them, and lower gearing, you lose power form friction of gears and spinninbg them. That is why in a car, the crank horsepower is anywhere from 14 to 21% higher than the wheel horsepower: Friction and kenetic energy (getting something moving)
horse power and torque are direcally praportional, and constant. if a car has 30 foot pounts of torque at 5252 RPM, it MUST HAVE 300 horsepower at 5252 rpm. the reason ricers can have high horsepower and very little torque is becuase they rev verry high. Any RPM above 5252 will have higher horsepower than torque. Muscle cars can have a **** load of torque, and just a lot of HP becuawe they start producing their torque at a very low RPM. Hence them being super fast off the line.
And for the really long complex thing above, here is a simplified version
If something has 20 lbs of torque, basically that means that if you have a bar mounted on an axis, such as the minure or hour hand of a clock, and the bar is 1 foot long, it can turn or stay still with up to 20 pounds on the end. or you cna have a 20 foot bar with 1 pound on the end. That is why having big wheels hurts your acceleration. larder radius (longer bar) means less force on the outside. to deal with that, gear it lower. in an ideal world with no friction and massless gears and wheels, it wouldnt matter. but if you have big wheels, you lose power spinning them, and lower gearing, you lose power form friction of gears and spinninbg them. That is why in a car, the crank horsepower is anywhere from 14 to 21% higher than the wheel horsepower: Friction and kenetic energy (getting something moving)
4th Gear
Joined: Nov 2005
Posts: 3,393
From: Columbus Ohio
RE: Torque or HP
ORIGINAL: Jeff
my car dosent use hp or tq. its all thrust. by that i mean i want a rocket car
my car dosent use hp or tq. its all thrust. by that i mean i want a rocket car
It was actually an old fighter jet they converted to a wheeled vehicle.
Bet that one has a good butt-dyno result.
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