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 Car Torque or horsepower?Which 1 is more important, For acceleration?

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Joey Christensen
post Dec 8 2009, 05:08 PM

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If Sir Isaac Newton is still alive, he would have been struck with heart attack after reading the postings in this thread. If only electric motor has been discovered back then this question wouldn't have been asked int he first place. Where efficiency is high, often greater than 0.9 this issue is a matter of dust. Absolutely bin material if you asked me.

Regards, Joey

p.s: Torque and power are (almost) flip sides of the same coin. They are entwined entities.

This post has been edited by Joey Christensen: Dec 8 2009, 05:22 PM
Joey Christensen
post Dec 9 2009, 09:57 AM

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Added on December 9, 2009, 10:28 am
QUOTE(joe_star @ Dec 8 2009, 08:35 PM)
What exactly is the point of your reply? where does this connect with the importance of torque or horsepower in a vehicle?
Please refer to my post script. It's already has it's meaning there and then.

Regards, Joey


Added on December 9, 2009, 10:30 am
QUOTE(Aurora @ Dec 8 2009, 11:43 PM)
Hmm, I have to disagree with you. (No offense, but this is what phd section is all about: argument and discussion  laugh.gif) In fact, motor is a perfectly good example of how engine can be so different. I'll drop the efficiency factor, since this is a discussion about torque and horsepower.


I wouldn't take it too far. Torque is the only thing that a driver feels, and horsepower is just sort of an esoteric measurement in that context.

Regards, Joey



This post has been edited by Joey Christensen: Dec 9 2009, 10:30 AM
Joey Christensen
post Dec 9 2009, 01:06 PM

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Torque is what powers you out of corners. Brake horse power (Bhp) is what keeps you going on the straight once you've established momentum. Torque and power, in terms of measurements of an engine system's performance, are measuring completely different things.

Basically, if you want to outrun the Polis DiRaja Malaysia (PDRM) you really want a powerful engine + some nut driving skills, if you want to pull your friend out of a "longkang", then a high torque engine would be helpful.

Regards, Joey

This post has been edited by Joey Christensen: Dec 9 2009, 01:08 PM
Joey Christensen
post Dec 10 2009, 10:11 AM

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This gives me the idea of being ignorant is good. For example: Takumi Fujiwara with his ignorance in how a car works.

Anyway, there are mathematical ways to explain, there the graphical way to explain it and last but not least, there are words to describe it too.

HP = Torque x RPM รท 5252 (If you realised when you are comparing a few charts, you'll notice that the two entities will be intersecting at 5252 RPM) It's a bit weird but it's all there is to it. Note that at 5252 RPM, torque and HP are equal.

Regards, Joey

p.s: From my rusty science knowledge understanding, torque is measured while power is calculated.

This post has been edited by Joey Christensen: Dec 10 2009, 10:12 AM

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