Wish My torque matched my hp!

 

Horsepower is the product of torque and speed. Or... HP = torque x speed.

1 HP = 33,000 ft-lbs per min Or 1HP = 33,000ft-lbs/min OR 550ft-lbs/sec

So, lifting 550 lbs one foot in one sec is one hp.

If it takes two secs to lift it you got 1/2 HP. If you can lift 1100 lbs in one sec you got 2 HP.

If you were making a bulldozer you want a lot of torque but you aren't in a big hurry. If you were making something to set a speed record at Bonniville you want a lot of speed but only just enough torque to get you up to speed by the time you get to the starting line. You ever notice that the motorcycles there need a push to get going.

 

You drive with torque and race with HP.

 

Just to make note of one of my pete peves: remember Torque is measured by "Pounds per Feet" (or Kilograms per Meter if you're in Japan and Newtons per Meter if you're in Europe) not "Feet per Pounds" or "Foot-Pounds" like those muscle car guys always say. It's always measured by weight over distance...

 

Tacoma vs 350Z?? O.o

I would not think that there could possibly be any doubts in anyones mind about that one...

TQ is important in the low rpm's. HP is important in the high rpm's. TQ is that initial UMFH while HP is what keeps you going.

For example, an s2k can do 0-60 in the high 5's with 153 ft/lb tq while a Z can also do 0-60 in the high 5's with 274 ft/lb tq. That will mostly depend on the driver, and the s2k will take more skill to do so, but you have to take weight, gearing, and many other factors into it as well.

 

unless the tacoma owner changes the tranny and rear end setup, he'll have nothing but bottem end power off the line. After that, it's all downhill in a race.

 

I think you need another pet peve.... Torque is NOT measured in Pounds PER Foot (or whatever units you care to use). Pounds PER foot implies Pounds/feet. This is NOT correct.

Torque is Pounds multiplied by feet. This is why pound-feet AND foot-pounds is equally correct. No matter which comes first, the result is the same.

Check your high school science book or google, it's easy to find.

 

HP & Torque

 

I CANT WAIT FOR MY Z only 48 hours of freaking waiting left!

 

+1 I was cringing when I read "pounds per feet."

It's pretty easy to remember if you think of a torque wrench... let's say the torque wrench has a 1 foot handle, and you apply 1 pound of force. There you go, 1 foot-pound of torque. Same result if you have a 1/2 foot handle and 2 pounds of force. Thus, pounds and feet are multiplied together, not divided.

 

Dude talk about an off topic post...


whatmaname: Why don't you go to a honda dealership and go test drive a civic. That way, when you get your Z it will feel just that much better to drive.

 

Whoops someone shoot me now (crawls into a hole and dies)...

My post was made from an assumption that I see so many times of people writing lb/ft of torque so I assumed it was weight divded by distance. I hear Pound-Feet all the time and Foot-Pound all the time but see it written lb/ft so I didn't realize they were multiplied together. Ok now I know...thanks
But "Foot-Pounds" still doesn't sound right though...oh well

 

You have absolutly no idea what you are talking about. I suggest you go over to www.howstuffworks.com and search for torque and horsepower.

 

Isn't the only issue power to weight ratio?

 

for the most part, other than when the power comes on in the power band.

 

yeah it's always funny when you talk to someone who knows just enough
about cars to be completely ignorant. for example, when they think since
their car has more hp it will be faster than your car. seems like power vs
weight would be an obvious concept... but it alludes most.

 

Smaller displacement motors can rev much higher than large displacement motors so that motorcycle motors rev crazy high. Single cylinder motors make mucho torque but cannot rev as high as multi cylinder motors of the same displacement.

http://www.totalmotorcycle.com/school-SectionSix.htm

 

right, because the more cylinders an engine has, the less it's volume per cylinder and hence the less it's stroke which allows it to rev faster since piston travel distance is not as long as if it was a single cylinder engine of the SAME displacement.

This is probably the reason why big rigs, fire trucks, and busses use big displacement (10-12 liters???) inline 6 cylinder deisel engines as opposed to say a V12 of the same displacement since the 6 cyl would have a longer stroke per piston giving it more low end torque than a 12 cyl. It won't rev as high and won't make much hp but in these applications hp is not as important as towing power.

 

I said: For a given design and SIZE, the engine with more cylinders generally delivers more horsepower and the engine with fewer cylinders generally delivers more torque.

You said: I think you are agreeing with me, but I could be wrong

 

tacoma runs 1/4 low 16's and traps 85-87. Z runs 1/4 mid 13's to low 14's and trap 100-103. not even close.