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Author Topic: 2012 Classic fuel mileage  (Read 938 times)

Guzzohm

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Re: 2012 Classic fuel mileage
« Reply #15 on: August 29, 2013, 01:45:21 AM »
20 hp motors?  :o

Oh!  You must be thinking about the Iron barrel engine.  The fuel injected UCE's produce 27.2 horsepower.  ;D
Maybe at the crankshaft.  I saw a dyno printout for a UCE which topped out at 20.5HP at the wheel.
2013 Honda CBR250R ABS  "Little Raven"
2007 Moto Guzzi Breva 750  "Karla"

Arizoni

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Re: 2012 Classic fuel mileage
« Reply #16 on: August 29, 2013, 04:19:18 AM »
Sounds about right.

All of the companies that I've heard of that list horsepower ratings are speaking of the horsepower at the crankshaft.

There's a lot of loss between the crankshaft and the rear wheel on any vehicle, what with all the chains and gears and oil and tires using up some of it so a loss of 5-7 horsepower should be expected.
Jim
2011 G5 Deluxe
1999 Miata 10th Anniversary

Ducati Scotty

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Re: 2012 Classic fuel mileage
« Reply #17 on: August 29, 2013, 06:18:30 PM »
I took my bike up a local ski mountain, about 6000 ft elevation at the peak.  The last section of road was a little steep as it switchbacks up to the lodge.  I could not go more than 45mph on that stretch.  The bike ran beautifully, but there's not much muscle left as the elevation gets higher.

Scott

hortoncode3

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Re: 2012 Classic fuel mileage
« Reply #18 on: August 29, 2013, 09:45:31 PM »
I bought a very nice Harley D cell phone holder that magnet mounts to the tank and placed a cheap dollar store spiral pad in it. Easy and cheap. My 2009 G5 gets a low of 60 and has got a high of 80 mpg. The higher mileage is a result of cruising consistently at 30-50 mph, a typical Vermont secondary  road jaunt.
I generally fuel up when the guys I ride with do. It's a good habit to get into, fueling when the opportunity presents itself. They all have V- twins so their mileage sucks.!

crush02342002

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Re: 2012 Classic fuel mileage
« Reply #19 on: August 31, 2013, 02:52:27 AM »
got my first tank of fuel today (low fuel light just starting to flicker on), dealership said they filled it (ill have to take their word for it), I calculated 73mpg. Im at or below sea level (Houston, Tx  USA)

High On Octane

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Re: 2012 Classic fuel mileage
« Reply #20 on: August 31, 2013, 03:20:29 AM »
got my first tank of fuel today (low fuel light just starting to flicker on), dealership said they filled it (ill have to take their word for it), I calculated 73mpg. Im at or below sea level (Houston, Tx  USA)

That's the going average rate on these bikes.  Some get better, some worst, but most report around 75mpg.

Scottie
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crush02342002

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Re: 2012 Classic fuel mileage
« Reply #21 on: August 31, 2013, 03:24:46 AM »
sounds good, its better than 41mpg I get with my Duc

meilaushi

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Re: 2012 Classic fuel mileage
« Reply #22 on: September 02, 2013, 01:39:04 PM »
I took my bike up a local ski mountain, about 6000 ft elevation at the peak.  The last section of road was a little steep as it switchbacks up to the lodge.  I could not go more than 45mph on that stretch.  The bike ran beautifully, but there's not much muscle left as the elevation gets higher.

Scott
Only steam engines get more powerful as the altitude goes up as I understand.  Any direct hot air operated engine gets less powerful as the air becomes thinner (lower pressure).  But that's OK...as I understand the new UCEs' fuel injection systems' mapping is set up to handle air pressures from sea level to around 18,000 feet (Himalayas) as that's about how high the Indian Army takes them on border patrol.  They do lose power but at least one doesn't have to re-jet 'em if one is going to head into the mountains.  Another nice aspect of REs besides beauty and all that other good stuff. ;)
Ralph Meyer
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ace.cafe

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Re: 2012 Classic fuel mileage
« Reply #23 on: September 02, 2013, 02:41:42 PM »
Yes, altitude makes a difference.
The EFI bikes can adjust the mixture for the altitude, so that's a nice feature of the EFI equipped bikes.
However, compression and breathing still are affected.
With the Iron Barrel engines, we make compression corrections for those people who live in high elevations and won't be likely to ride down to sea level much.
We have some users at 7000' elevation who are using over 9.5:1 compression, and have about the same cranking compression psi as users at sea level with 8.25:1 compression. So, they get about the same power output as the guys at sea level, but need some corrections to be able to do it. And if they come down to lower altitudes, they'd need octane booster to stave off the ping.
But it works.
We are very well-versed in correcting for altitude, and we do it for every Fireball owner as part of their build support.
« Last Edit: September 02, 2013, 03:04:45 PM by ace.cafe »
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