Efi
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Tourer
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From: Rockys
Efi
Picked up a 2003 Ultra with EFI that has me baffled on the fuel consumption.
No wind, no hills, hi-way, running 70 MPH and only getting 34 MPG little luggage and one person, me, on the bike.
On one strech, nearly did not make it to a gas stop and only got 166 miles on 4.85 gallons (5 gallon tank).
I'm used to my EVO Ultra with a carb that can get up to 50 MPG, or up to 250 miles on a tank in a similar situation. EFI is supposed to get better mileage than a carb, but, I'm not seeing this.
Then, all of a sudden on a tank, same day, same trip.... I get 44 MPG with the EFI, under similar riding conditions. I fill up to the brim of the fuel tank neck each time and calc MPG (miles / gallons).
Whats going on here, do I have a faulty EFI sensor or something like that which is causing the EFI to run in "rich" mode most of the time ?
Bike has a Stage 2, 95" big bore kit, Vance & Hines true duals, super sucker air filer.
No wind, no hills, hi-way, running 70 MPH and only getting 34 MPG little luggage and one person, me, on the bike.
On one strech, nearly did not make it to a gas stop and only got 166 miles on 4.85 gallons (5 gallon tank).
I'm used to my EVO Ultra with a carb that can get up to 50 MPG, or up to 250 miles on a tank in a similar situation. EFI is supposed to get better mileage than a carb, but, I'm not seeing this.
Then, all of a sudden on a tank, same day, same trip.... I get 44 MPG with the EFI, under similar riding conditions. I fill up to the brim of the fuel tank neck each time and calc MPG (miles / gallons).
Whats going on here, do I have a faulty EFI sensor or something like that which is causing the EFI to run in "rich" mode most of the time ?
Bike has a Stage 2, 95" big bore kit, Vance & Hines true duals, super sucker air filer.
Extreme HDF Member
Joined: Sep 2010
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From: Phoenix '53, '88, '09 Big Twins
I would guess that your has been tuned or altered somehow which could be looked at- tuning is sometimes adjusted overly rich esp at high speeds
even so, the efi is not much better than carb for MPG
my evo bagger w. carb was good for 45 MPG at 65 MPH fully loaded with me and camping gear
my 09 FLHTC is good for 43 MPG at 70 ish
Not the gains you might expect from a more complex/accurate system even with the larger displacement should be offset by the 6 speed tranny's longer legs.
Mike
even so, the efi is not much better than carb for MPG
my evo bagger w. carb was good for 45 MPG at 65 MPH fully loaded with me and camping gear
my 09 FLHTC is good for 43 MPG at 70 ish
Not the gains you might expect from a more complex/accurate system even with the larger displacement should be offset by the 6 speed tranny's longer legs.
Mike
Last edited by mkguitar; Sep 25, 2012 at 12:15 PM.
Intermediate
Joined: Jul 2012
Posts: 27
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From: SoCal
Same bike here running 42 mpg on average. Something doesn't sound right. Mine is EFI as well. 34 is pretty low.
Just put on Stage 1, pipes and fuel pak but haven't calculated the new mileage so unsure of where I am now.
Just put on Stage 1, pipes and fuel pak but haven't calculated the new mileage so unsure of where I am now.
Road Master
Joined: Aug 2012
Posts: 944
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From: Ct
Bike has a Stage 2, 95" big bore kit, Vance & Hines true duals, super sucker air filer.
Cant compare apples to oranges either did your other bike have a stage 2? 95"? etc.. if it isnt exactly the same it wont be the same and even if it is nearly the same set up all bikes are different so you might just need a tune.
Lump
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Tourer
Joined: Mar 2008
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From: Rockys
Yup, sounds like I need to find someone in my neck of the woods that can tune an EFI for more fuel efficiency.
Previous owner said he had it dyno tuned, and he was getting 32 MPG.
If I keep it at 65 mph (and there is no way I can't ride that s...l...o...w on a long trip) on the open road, it gets get 43 MPG.
At 75 mph = 37 MPG.
About town, and 80 mph = 34 MPG.
Previous owner said he had it dyno tuned, and he was getting 32 MPG.
If I keep it at 65 mph (and there is no way I can't ride that s...l...o...w on a long trip) on the open road, it gets get 43 MPG.
At 75 mph = 37 MPG.
About town, and 80 mph = 34 MPG.
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Ultimate HDF Member
Joined: Dec 2007
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From: Lake City, Florida (Native)
Can get around 45 MPG on the Ultra if don't exceed 70 MPH and no heavy throttle through the gears .. That happens about 2% of the time I ride, usually runs high 30's MPG
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From: Phoenix '53, '88, '09 Big Twins
That is actually not too out of line- the 43/37/34 is pretty much the results of air resistance.
so I would say maybe 2 or 4 mpg lower than what other riders get- and take into account the work done on the motor
a better tune might pick up a couple of MPG...or swapping some components
what's your gearing like ?
if you have plenty, plenty grunt down low, you may be able to go to a 65T rear pulley.
mike