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Originally Posted by SilentBob420BMFJ
im not sure what the torque curve looks like, but the peak torque should be at least 500 rpms lower than the peak hp i would think.. yes i just learned tq and rpm = hp, thus meaning hp is a a measure of overall capability, just like watts is volts x amps, but im still a noob to cars, and the hp vs tq seems to stump me..
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ideally, peak torque should come at 1RPM, and should not drop off at any RPM. but thats not how gas engines work. when an engine gets to peak torque it will drop off. to minimize the amount of drop off, peak torque SHOULD come at redline dont you think? remember that horsepower is made from torque and revs. so for max HP from a set amount of torque, you need that torque to come in the high revs.
the thing is, that even though 'peak torque' comes at ~6500 in our cars and peak horsepower comes at 7800, from 6200 to 7800, the torque BARLEY drops a couple lb-ft. very good.
so unless you were gonna go from 180lb-ft at 6000RPM and then suffer a massive drop in torque and go down to 130lb-ft at 8000RPM, no, your just NOT gonna get an 8k redline and 200tq and 200hp.
not to mention, that would be a bad thing, because torque is what moves a car. you dont want torque to be dropping off.
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i found a really awsome article on how torque is more important than hp, and i emailed the guy and asked him a few questions, and this is what i got back.. "im sure your not stupid, but you look very ignorant typing how you do, blah blah blah" and he gave me a 1 sentence answer ending with "..it appears you already knew this, but chose to ignore it" or something like that.. long story short, i welcomed him to the 21st century, the internet, speed typing, and guess that he was at least 40 years old, probably more like 50, and he emails me back saying hes 65.. what an asshole..
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that really awesome article, is wrong. i dont mean to be agist, but since the guy is 65, he's probably grown up around muscle cars and has a bias against foreign cars and small displacement.
something to understand is that 200lb-ft of torque isnt enough to move a car. but 5000RPM is WAY WAY WAY too much RPM than whats needed to the wheels. what gearing does is transfer RPM to Torque.
The amount of potential torque and RPM at the wheels is based on horsepower. what torque and what RPM the engine made is meaningless
see this pic which was up in an earlier post:
what that guy doesnt understand is that "torqeless cars" have more revs for the gearbox to work with.
whats more important than peak torque is the shape of the torque curve. the shape of the torque curve tells us how close we are to peak torque. we want our cars to be close to peak torque all the time, ESPECIALLY in the high revs.