stormin94

Yes, please read the rest of the post. You have a point, but it also proves my original point that torque is related to displacement. If you build the engine to have more RPM, it may have more HP, but the torque will stay mostly the same, maybe a little higher RPM than before, though.

Dirt Driver

I did read your whole post. Now do me the favor of digesting mine.

If the power peak occurs at an RPM higher than 5252, then torque will be lower than power regardless of displacement.

Bumpin' Yota

Oh yes you can! Take a ride with me in my LS1 GTO and believe me, I will show you torque that you will feel! You will feel it so much so you'll pee your pants! 300ftlbs of tq at 2000rpm (to 6000rpm) with a peak of 365ft lbs is a beautiful thing! (oh yeah and 29mpg too! hehe!)

Any vehicle regardless of its make or type will accellerate the hardest at its torque peak. The "HP" section of the curve is merely a calculated number based off of the torque.

FredTJ

Matter of fact, TORQUE is the ONLY thing that you feel. You don't "feel" HP.




Fred

davenjai

Never ridden one have you? I can assure you, you can feel horsepower. HP wins drag races, not TQ. Like I said right tool for the job. Even in tractor pulls they build HP biased motors. If you want o move a lot of weight slowly, you build a big motor with a ton of CR. Back to bike, math don't go low 10's in the 1/4 mile. With 34lbft and 94hp at the rear wheels, it's not TQ either. Oh, a new trend is putting the larger (13,1400cc) engines in cars. Turboed they can make 500+HP with 200+lbft. making something like a mini cooper into a rocket. You just have to decide if you want to haul ass or plywood?

liferunner2

The two of them are linked. Torque is a measure of engine's ability to accelerate a rotation, or a twisting force it is only a force. Power is a measure of the engines ability to do work. But, let's imagine an engine even more gutless than my 3vze, one that produces so little torque that it cannot turn the flywheel, it produces some torque but not enough to spin the flywheel. So even though a force is being applied, no work is being done because no motion has occurred, this engine does not produce a measurable amount of power at the flywheel. So, again HP is calculated based on torque, as was said earlier, and if you look up the S.I. units of energy, work, and force in any physics text you can easily see how they relate. Go read a book and learn some .

I don't know if that helps.

Chris

ernest t bass

it seems to me that the 3.0 has a rather high torque peak.
doesnt 3400 seem a little high for a truck motor.
this motor seems to have a much better rev capability than say a ford 3.0
perhaps its the tranny on the ranger. the one i drove was more responsive.
side by side at half throttle the ranger blows the toyota away.
but at full throttle the toyota pulls better once its past 3400 or so and will eventually pull the ranger.
this is regarding 2wd automatic trucks.

150 hp at 4800
180 lb ft at 3400

Dirt Driver

The late '90s Ford 3.0 has similar output characteristics; 150hp @ 5000rpm and 185lb-ft @ 3750. It's still a turd, though. The 4.0 blew it out of the water with more torque, more power, and the same fuel economy.

stormin94

Motorcycle engines are a diferent story. Racing depends largely on power to weight ratio. Motorcycles don't wiegh much, so they won't need much torque, but the more the better. As for Torque not being related to Displacement, and more related to RPM's, I'd really like to see your source on that. Maybe why does the Supercharged 2.2 liter Honda 4Cylender engine make 300HP@6800RPM, and 300ft-lb of torque at around 3450RPM?????

tc

Because it's supercharged, duh.

Supercharging is a way of burning the same amount of fuel per spark as a larger displacement engine.

stormin94

Yeah, but some one on here said that ALL motors will have more HP than torque if they make their peak HP over 5225 RPM.

Dirt Driver

The aforementioned equation, my previous example, and the dyno charts out there are my sources. 5252rpm is where torque and power are equal. Below that, torque is higher than power. Above 5252rpm, the opposite is true. Naturally there may be exceptions for the odd highly efficient engine, but they are the exception rather than the rule and likewise many variables come into play. My point is that displacement does not dictate how much output an engine has nor where it occurs.

What is "the" supercharged Honda you speak of and what blower type?

davenjai

The more the better for what? The point I have been trying to get across is HP for speed and TQ for weight. A blower just add's artificial inches. This same arguement rages between the Harley and the sportbike groups. Then you get to add operator preferance. Do you like to shift? Do you hate to shift? Just run what you brung, if it ain't enough? Get something else! BTW, I'll take the rev's!

Belize Off Road Team

i have absolutly NO clue what did anything. all i know is that your normally supposed to replace the CAT. every so often. and mine was done before i bought it. so i dont know what it did, but i have got better MPG's and more power at lower RPM's. if you can explain to me what WOULD cause me to get increased power and MPG's that would be good.