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Location:
Brisbane
Registered:
May 2002
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Re: Fuel usage at same RPM levels in different gears
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Mon, 16 June 2003 12:13
 
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Yeah, it's pointless comparing fuel economy at different speeds because factors like wind resistance and rolling friction have more effect than the engine's efficiency.
As a rough guide, your engine is at its most efficient when it's developing peak torque. Even that's not clear-cut though, because some engines develop their peak torque at relatively high rpm, and the engine's internal losses increase with rpm!
I think it's safe to say that spinning the engine at a lower speed at any given road speed is the most fuel efficient, provided the engine isn't labouring.
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| | Subject | Poster | Date |
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Fuel usage at same RPM levels in different gears
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BlackSupra | Mon, 16 June 2003 11:21 |
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Re: Fuel usage at same RPM levels in different gears
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manipulate | Mon, 16 June 2003 11:59 |
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Re: Fuel usage at same RPM levels in different gears
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Norbie | Mon, 16 June 2003 12:13 |
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Re: Fuel usage at same RPM levels in different gears
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BlackSupra | Tue, 17 June 2003 10:34 |
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Re: Fuel usage at same RPM levels in different gears
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manipulate | Tue, 17 June 2003 11:00 |
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Re: Fuel usage at same RPM levels in different gears
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draven | Tue, 17 June 2003 11:42 |
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Re: Fuel usage at same RPM levels in different gears
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oldcorollas | Tue, 17 June 2003 12:23 |
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Re: Fuel usage at same RPM levels in different gears
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kingmick | Tue, 17 June 2003 12:08 |
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Re: Fuel usage at same RPM levels in different gears
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manipulate | Tue, 17 June 2003 12:09 |
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Re: Fuel usage at same RPM levels in different gears
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SUPRAGTE | Tue, 17 June 2003 13:21 |
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Re: Fuel usage at same RPM levels in different gears
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oldcorollas | Wed, 18 June 2003 04:05 |
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Re: Fuel usage at same RPM levels in different gears
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SupraPete | Tue, 17 June 2003 23:29 |
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Re: Fuel usage at same RPM levels in different gears
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GIN51E | Wed, 18 June 2003 07:59 |
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Re: Fuel usage at same RPM levels in different gears
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Remedy | Wed, 18 June 2003 08:40 |
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Re: Fuel usage at same RPM levels in different gears
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jza70-mel | Thu, 19 June 2003 17:04 |
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Re: Fuel usage at same RPM levels in different gears
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Nark | Sat, 21 June 2003 01:59 |
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Re: Fuel usage at same RPM levels in different gears
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willwal98 | Thu, 19 June 2003 23:25 |
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Re: Fuel usage at same RPM levels in different gears
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manipulate | Fri, 20 June 2003 09:48 |
