What is the most critical factor for engine performance? - Sportbike Forum: Sportbike Motorcycle Forums
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post #1 of 22 (permalink) Old 03-15-2002, 10:00 PM Thread Starter
 
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What is the most critical factor for engine performance?

What is the most critical engine design factor for maximum horsepower?
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post #2 of 22 (permalink) Old 03-15-2002, 10:20 PM
 
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For maximum horsepower, the introduction and removal of fuel/air mixture, and subsequently exhaust gasses must be maximzed.
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post #3 of 22 (permalink) Old 03-16-2002, 02:16 AM
 
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the rpm achievable is the greatest factor in horsepower produced regarding a particular displacement. However, displacement is probably THE most imortant factor in power production.
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post #4 of 22 (permalink) Old 03-16-2002, 06:40 AM Thread Starter
 
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Hi Kevlar7R,

It is true that introduction of the fuel/air is the net result that determines the maximum power. However that is a little vague. What precisely limits it?

Hi apexismaximus,

You could have huge displacement, but what most important factor limits the amount of horsepower. High RPM is the net result, but what is the limiting factor?

Andy
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post #5 of 22 (permalink) Old 03-16-2002, 09:21 AM
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Quote:
Originally posted by Andy
High RPM is the net result, but what is the limiting factor?

Andy
Based on that, I'd say you're looking for "piston speed".

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post #6 of 22 (permalink) Old 03-16-2002, 10:33 AM Thread Starter
 
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Hi Dad,

So far Kevlar7R was the closest. I'm looking for the single most important factor for maximum power.

Andy
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post #7 of 22 (permalink) Old 03-16-2002, 11:58 AM
 
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Okay, are you talking about the ability to use a combustable fuel, an energy containing substance??????????????? Ultimately, that is the limiting factor.
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post #8 of 22 (permalink) Old 03-16-2002, 12:16 PM
 
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well, then,

from a purely thermodynamic point of view, In order to produce more power, more fuel must be used. Therefore, to produce the maximum horsepower of the engine, it must be able to liberate the maximum amount of energy from the fuel supplied to it. This is independant of the total amount of fuel supplied, since that is directly related to displacement.

Last edited by Kevlar7R; 03-16-2002 at 12:24 PM.
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post #9 of 22 (permalink) Old 03-16-2002, 12:20 PM
 
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I don't think IMHO that it's the most important factor but maybe he's talking about valve area???????? You sure ain't gonna move much charge with 1mm valves????????
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post #10 of 22 (permalink) Old 03-16-2002, 12:25 PM
 
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Apex,

Perhaps you should re-read my first post in this thread, then get back to us.
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