Engine Performane
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Stage III
Joined: Jun 2008
Posts: 3
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Engine Performane
This is probably a crazy question to post, but here goes.
I own an 2003 Road Glide with 20,000 Miles on it. I have 2 friends that have the same model as I do, One is a 2003 with 38,000 miles and the other is a 2006 with 28,000 miles.
My bike is pretty much stock other than the stage one download and air cleaner, and I have Hooker slip-on Mufflers.
The other 2003 is pretty much the same as mine except he has Rheinhart true duals.
The 2006 has screaming eagle slip-ons and performance gear driven cam.
All of us ride pretty much the same way and time in the saddle.
The question that I have is why would my bike average 47 miles to the gallon and the other 2 only average about 34 - 36 Miles per gallon?
Not that I am complaining, it's just curious to me that there would be that big of a difference.
Thanks for you input.
I own an 2003 Road Glide with 20,000 Miles on it. I have 2 friends that have the same model as I do, One is a 2003 with 38,000 miles and the other is a 2006 with 28,000 miles.
My bike is pretty much stock other than the stage one download and air cleaner, and I have Hooker slip-on Mufflers.
The other 2003 is pretty much the same as mine except he has Rheinhart true duals.
The 2006 has screaming eagle slip-ons and performance gear driven cam.
All of us ride pretty much the same way and time in the saddle.
The question that I have is why would my bike average 47 miles to the gallon and the other 2 only average about 34 - 36 Miles per gallon?
Not that I am complaining, it's just curious to me that there would be that big of a difference.
Thanks for you input.
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Stage III
Joined: Jun 2008
Posts: 3
Likes: 0
RE: Engine Performane
Considering the fact that I keep track of my mileage at every fillup by turning my trip meter to 00 the Math is not at all difficult.
Every single tank of gas that I have calculated comes out to between 47-48 miles per gallon. I just rode from Wittmann to Prescott which is approximately 100 miles each way and I averaged 52 Miles per gallon on the trip which was the same as the friend who went with me and he was riding a Triumph 750.
Thanks
Every single tank of gas that I have calculated comes out to between 47-48 miles per gallon. I just rode from Wittmann to Prescott which is approximately 100 miles each way and I averaged 52 Miles per gallon on the trip which was the same as the friend who went with me and he was riding a Triumph 750.
Thanks
Extreme HDF Member
Joined: Sep 2005
Posts: 11,615
Likes: 50
From: Baton Rouge, LA
RE: Engine Performane
It's all in the tuning. Tune it rich and it'll get lousy mileage. I get up to 50mpg with my SG, but I've achieved that only after considerable tweaking of my PCIII map.
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Joined: Mar 2008
Posts: 58
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From: Cajun Country
RE: Engine Performane
I get between 45 and 50, and as much as 52 on one particulary slow group ride. Can't complain with those numbers.
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Elite HDF Member
Joined: Nov 2006
Posts: 3,647
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From: Stockbridge, GA (Atlanta)
RE: Engine Performane
+1
ORIGINAL: iclick
It's all in the tuning. Tune it rich and it'll get lousy mileage. I get up to 50mpg with my SG, but I've achieved that only after considerable tweaking of my PCIII map.
It's all in the tuning. Tune it rich and it'll get lousy mileage. I get up to 50mpg with my SG, but I've achieved that only after considerable tweaking of my PCIII map.
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Ultimate HDF Member
Joined: Mar 2008
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From: SW Florida
RE: Engine Performane
As already suggested, gas mileage has \\;\\\\\\;to do with tuning and riding habits. Most good tuner will balance performance and mileage \\;\\\\\\;when \\;\\\\\\;they tune a bike. I have a well tuned bike and get an average of 40 mpg.
 \\;\\\\\\;
If a bike running in a lean condition, mileage will be higher. This \\;\\\\\\;lean condition can \\;\\\\\\;cause the engine to run hot, to very hot. One way to tell is to pull the plugs and take a look. If the insulator \\;\\\\\\;is entirely white this would indicate a lean condition. If the plug is dark then this would indicate a rich mixture and \\;\\\\\\;reduced gas mileage. Here's more information on reading spark plugs by Doc 1.
 \\;\\\\\\;
If a bike running in a lean condition, mileage will be higher. This \\;\\\\\\;lean condition can \\;\\\\\\;cause the engine to run hot, to very hot. One way to tell is to pull the plugs and take a look. If the insulator \\;\\\\\\;is entirely white this would indicate a lean condition. If the plug is dark then this would indicate a rich mixture and \\;\\\\\\;reduced gas mileage. Here's more information on reading spark plugs by Doc 1.
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