Outside temperature and MPG - SV650.org

24-10-13, 09:32 AM

Morning All

Was just sat at work wondering after filling in my Fuelly.com entry, is MPG connected outside temperature?

As the summer has drawn to a close my MPG has slowly reduced.

MJC-DEV · 24-10-13, 11:59 AM

Yes, more choke is required to start a colder engine. Not sure about when warm and running though.

24-10-13, 12:05 PM

Yes, MPG will be higher in warmer weather. Factors include air density, warm up time, air resistance, rolling resistance and gasoline formulation.

Paul the 6th · 24-10-13, 12:17 PM

I'm no expert but the basics of it are, the more air you can get into the engine, the more fuel goes in, the more power you get out. Colder air is denser than warm air, so a dry road on a frosty day, the engine may potentially feel slightly more perky.

yorkie_chris · 24-10-13, 12:49 PM

More time spent on choke before it's warm.

I think rest of factors are minimal and probably cancel out to some degree or are lost in the rest of the "noise" that comes with measuring economy.

24-10-13, 12:51 PM

Cheers guys, odd thing is I rarely use the choke, only when it gets really really cold which it isn't yet.

Bibio · 24-10-13, 12:58 PM

as it gets colder/wetter your speeds reduce so it makes sense then your MPG will be better. yes cold air is better than hot air but in reality it makes no fekin difference unless you have carbs that like to ice up.

jambo · 24-10-13, 01:07 PM

Are you using the air conditioning more in the colder weather? That can make a difference...

Jambo

24-10-13, 01:16 PM

http://www.scientificamerican.com/ar...fuel-economy-o
Lots of information like this is available just by using Google.

Paul the 6th · 24-10-13, 03:25 PM

Quote:

Originally Posted by jambo

Are you using the air conditioning more in the colder weather? That can make a difference...

Jambo

LAD

24-10-13, 09:32 AM	#1
daveyrach Guest Posts: n/a	Outside temperature and MPG Morning All Was just sat at work wondering after filling in my Fuelly.com entry, is MPG connected outside temperature? As the summer has drawn to a close my MPG has slowly reduced.

24-10-13, 11:59 AM	#2
MJC-DEV Member Join Date: Mar 2011 Location: Falmouth Posts: 621	Re: Outside temperature and MPG Yes, more choke is required to start a colder engine. Not sure about when warm and running though. __________________ 2006 SK6, wavy discs, 8.5N K-Tech springs, Debrix Emulators, Nitron Shock, Silkolene RSF Pro 10W, Eastern Beaver H4 Dual Headlight Relay Kit, Avon Storm Ultra 2 tyres, Ebay billet brake/clutch levers

24-10-13, 12:05 PM	#3
wideguy Guest Posts: n/a	Re: Outside temperature and MPG Yes, MPG will be higher in warmer weather. Factors include air density, warm up time, air resistance, rolling resistance and gasoline formulation.

24-10-13, 12:17 PM	#4
Paul the 6th Member Mega Poster Join Date: Mar 2007 Location: Yorkshire Posts: 4,790	Re: Outside temperature and MPG I'm no expert but the basics of it are, the more air you can get into the engine, the more fuel goes in, the more power you get out. Colder air is denser than warm air, so a dry road on a frosty day, the engine may potentially feel slightly more perky. __________________ RIP Reeder 20/07/1988 - 21/03/2012 - You were awesome Cbf600, sv650, sv1000, gsxr 750 srad, KTM adventure 950, gsxr 750 k1, gsxr 750 srad, fazer 1000, zx9r ninja..

24-10-13, 12:49 PM	#5
yorkie_chris Noisy Git Mega Poster Join Date: Apr 2007 Location: Halifax/Leeds Posts: 26,645	Re: Outside temperature and MPG More time spent on choke before it's warm. I think rest of factors are minimal and probably cancel out to some degree or are lost in the rest of the "noise" that comes with measuring economy. __________________ Currently Ex Biker Now rebuilding a 63' fishing trawler as a dive boat

24-10-13, 12:51 PM	#6
daveyrach Guest Posts: n/a	Re: Outside temperature and MPG Cheers guys, odd thing is I rarely use the choke, only when it gets really really cold which it isn't yet.

24-10-13, 12:58 PM	#7
Bibio Member Mega Poster Join Date: Jul 2008 Location: here as devil's advocate Posts: 11,561	Re: Outside temperature and MPG as it gets colder/wetter your speeds reduce so it makes sense then your MPG will be better. yes cold air is better than hot air but in reality it makes no fekin difference unless you have carbs that like to ice up.

24-10-13, 01:07 PM	#8
jambo Member Mega Poster Join Date: Aug 2003 Location: Croydonia Posts: 5,376	Re: Outside temperature and MPG Are you using the air conditioning more in the colder weather? That can make a difference... Jambo __________________ Modern motorcycles are bloody brilliant, enjoy it while we can

24-10-13, 01:16 PM	#9
wideguy Guest Posts: n/a	Re: Outside temperature and MPG http://www.scientificamerican.com/ar...fuel-economy-o Lots of information like this is available just by using Google.

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