Outstanding MPG
Outstanding HDF Member
Joined: Mar 2008
Posts: 3,471
Likes: 5
From: Ocala, FL
You can't extrapolate from your experiences that the PCIII gets lousy mileage while TTS is the other way around. Both simply tell the EFI how much fuel to inject at a given RPM and TP. The TTS does this by altering the ECU's configuration and the PCIII does it by intercepting the signal and altering it. The net effect is identical, and had you attempted to tweak the PCIII to get better mileage you would've reaped the benefits from that effort. I got 45-50mpg with a PCIII and later with a PCV, so it can be done regardless of the tuner you use, assuming it can be programmed to affect mileage in the range where you operate the bike. Both TTS and PC can do this.
Stellar HDF Member
Joined: Oct 2007
Posts: 2,947
Likes: 234
From: Kentucky
I've had 4 big twins since 02, 3 carbed and my current is efi. I have gotten an average of 48 highway mileage with all 4 in their stock form. After rejetting the carbed bikes I lost 10% of my fuel mileage. After setting up my fuelpak to suit me I also lost 10% of my fuel mileage. All these bikes was just a simple stage 1 setup. City riding will decrease mileage a lot, most of my riding is on the road as I hate riding around town.
Seasoned HDF Member
Joined: Jul 2007
Posts: 6,336
Likes: 67
From: SW Minnesota
How many of you have checked the accuracy of your odometer? Next time out, take a long stretch of road and set one of your trip meters as you pass by a mile marker, and check it for accuracy. You my find that the Harley odometer is as inaccurate as the speedometer, and puts more miles on than you actually traveled. Here's a chart for checking your speedometer. Set your cruise right at 60, and time yourself for a few miles, and compare to this chart (click it twice and it will open big enough to read). This chart is courtesy of the Mn State Patrol.
Seasoned HDF Member
Joined: Jul 2007
Posts: 6,336
Likes: 67
From: SW Minnesota
To further explain my last post, here's a simple example of just a 2% odometer error.
If you travel 100 miles, and use exactly two gallons, you are getting 50 mpg. If you odometer is off by 2% and reads 102 miles, you now think you got 51 mpg. Motorcycle Consumer News now indicates speedo errors in their tests, and some are off by 5% or more.
If you travel 100 miles, and use exactly two gallons, you are getting 50 mpg. If you odometer is off by 2% and reads 102 miles, you now think you got 51 mpg. Motorcycle Consumer News now indicates speedo errors in their tests, and some are off by 5% or more.
Seasoned HDF Member
Joined: Jan 2008
Posts: 5,914
Likes: 3,196
From: On one of 10,000
m.p.g.
Last 3 tanks of highway riding; 41, 43, 42 m.p.g.
Stock 2007, FatCat 2 in 1, Power commander, S/E air cleaner, dynotune.
I will be checking again soon. An Andrews26 & another Dynotune being done as we speak...
Stock 2007, FatCat 2 in 1, Power commander, S/E air cleaner, dynotune.
I will be checking again soon. An Andrews26 & another Dynotune being done as we speak...
Seasoned HDF Member
Joined: Jan 2008
Posts: 5,914
Likes: 3,196
From: On one of 10,000
Thanx for this
How many of you have checked the accuracy of your odometer? Next time out, take a long stretch of road and set one of your trip meters as you pass by a mile marker, and check it for accuracy. You my find that the Harley odometer is as inaccurate as the speedometer, and puts more miles on than you actually traveled. Here's a chart for checking your speedometer. Set your cruise right at 60, and time yourself for a few miles, and compare to this chart (click it twice and it will open big enough to read). This chart is courtesy of the Mn State Patrol.
I've noticed this side by side with my Wife's 95 FatBoy. My FLTR racks up the miles quicker. Not much, but noticeable.
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Road Warrior
Joined: Jan 2009
Posts: 1,433
Likes: 922
From: Northern MI
I really wonder how some of you figure MPG.. I just dont believe a lot of the figures.. I guess ill just go with my 39/41 with the bike running great and not worry about it.. Im really surprised some of your bike just done seize up. they have to be running way hot at that MPG 
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