Where to find torque details??

miniyazz

miniyazz

miniyazz

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Joined
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Hi guys,

I've been reading up a bit on torque this evening, and was wondering if anyone knew where I can find any information on torque or power bands (e.g. graph showing torque at different rpm or power bands) for my car? (1994 Peugeot 106 Aztec 1.4l, if that helps). I had something of a google but couldn't find anything very useful, thought one of you might know where/what to look for.

Cheers
 
That's exactly what I was looking for, thanks :)
Looks like my sweet spot with accelerating is 5500 rpm, but for maximum acceleration through the gears I would presumably need to accelerate to higher rpm, with associated loss of power, before moving up a gear, otherwise my rpm in the higher gear will be too low for optimal acceleration? If that makes sense!

So am I right in thinking the point of maximum fuel efficiency is where torque is highest? In both cruising and acceleration?

The only thing that slightly confuses me is the power dropping once the revs pass the power peak. I know it's due to the torque dropping faster than the rpm increase, and I suppose it means if I happenend to be cruising in 2nd gear, say, with the accelerator mostly down and the revs at 5500 I would actually be travelling faster than if I had the accelerator further down and the revs at 6000? That just sounds counter-intuitive, but I suppose that's right.
 
miniyazz said:
Looks like my sweet spot with accelerating is 5500 rpm, but for maximum acceleration through the gears I would presumably need to accelerate to higher rpm, with associated loss of power, before moving up a gear, otherwise my rpm in the higher gear will be too low for optimal acceleration? If that makes sense!

So am I right in thinking the point of maximum fuel efficiency is where torque is highest? In both cruising and acceleration?

The only thing that slightly confuses me is the power dropping once the revs pass the power peak. I know it's due to the torque dropping faster than the rpm increase, and I suppose it means if I happenend to be cruising in 2nd gear, say, with the accelerator mostly down and the revs at 5500 I would actually be travelling faster than if I had the accelerator further down and the revs at 6000? That just sounds counter-intuitive, but I suppose that's right.
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:confused:

Morba said:
none. all the way through.
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:D:D:D:D
 
miniyazz said:
The only thing that slightly confuses me is the power dropping once the revs pass the power peak. I know it's due to the torque dropping faster than the rpm increase, and I suppose it means if I happenend to be cruising in 2nd gear, say, with the accelerator mostly down and the revs at 5500 I would actually be travelling faster than if I had the accelerator further down and the revs at 6000? That just sounds counter-intuitive, but I suppose that's right.
Click to expand...

Not only is it counter-intuitive, it's just plain wrong! Provided your clutch isn't slipping, there is a solid mechanical connection between the engine and the wheels with a manual transmission, it's simply not possible for the engine speed to increase and wheel speed to decrease.

The point you are missing is that at 5500 RPM there is more engine torque available, so you would need less throttle opening to achieve the same torque that you would at 6000RPM.
 
Janesy B said:
What?
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Hehe, this seems to be a trend. Perhaps I should take eloquence lessons.

Sin_Chase said:
Torque is turning force, not turning speed.

6000 RPM from your engine into your gear box spins your drive shaft faster than 5500 does.
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Hmm that does make more sense.
I believe I was getting confused with acceleration potential and top speed.

Morba said:
Cruising, 2nd gear, 5500rpm..

Are you sure you have a license?
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It was hypothetical, that would be silly.

Dogbreath said:
Not only is it counter-intuitive, it's just plain wrong! Provided your clutch isn't slipping, there is a solid mechanical connection between the engine and the wheels with a manual transmission, it's simply not possible for the engine speed to increase and wheel speed to decrease.

The point you are missing is that at 5500 RPM there is more engine torque available, so you would need less throttle opening to achieve the same torque that you would at 6000RPM.
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Thanks, yes, I got there in the end :o
 
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Janesy B said:
Don't get me wrong, you seem intelligent but sometimes you leave me scratching my head :p
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I think my main problem is I need to understand more about how an internal combustion engine works, and the mechanics behind it, before making these silly assumptions. That shall be my project for the next few days!
 
I find the mention of maximum torque, best acceleration, top speed et all in the context of a 1.4 Peugeot 106 slightly amusing :-)

Your time would be better spent researching how to break wind harder and stronger :-)
 
amigafan2003 said:
I find the mention of maximum torque, best acceleration, top speed et all in the context of a 1.4 Peugeot 106 slightly amusing :-)
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Well it's no worse than the guys with the chipped diesels thinking they now own supercars doing it...

*Runs*

*Hides*

Hehe.


EDIT: ^............nice... Maybe best to give Pampers a call before any attempt.
 
Well it's no worse than the guys with the chipped diesels thinking they now own supercars doing it...
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You're right, the guys with chipped diesels are MUCH worse!
 
amigafan2003 said:
I find the mention of maximum torque, best acceleration, top speed et all in the context of a 1.4 Peugeot 106 slightly amusing :-)

Your time would be better spent researching how to break wind harder and stronger :-)
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:p unfortunately I'm out of baked beans, so this is all I have left!
 
book the car in for some dyno time. dont bother with rolling roads, have the engine out and on an engine dyno, that way you can know the true torque output
 
Matt82 said:
book the car in for some dyno time. dont bother with rolling roads, have the engine out and on an engine dyno, that way you can know the true torque output
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Sounds expensive :p I'm a cheap, cheap student.

But I'll bear it in mind in a couple of years time (when I have money and can upgrade!)
 
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