Improved MPG
Road Master
Joined: Nov 2009
Posts: 997
Likes: 3
From: Charlotte, N.C.
I had the same setup on my bike and it does work I was able to get 46mpg when cruising at 65mph, I was just always worried i was running too lean and would burn valves and possibly holes in the piston. I noticed that the filament on my number 1 cylinder spark plug would warp after a lean ride like that and i would have to reset the gap, I took that as an indication that I was running too lean. What I would like to know what would it take for the MoCo. to make the 2012 touring models get at least 60mpg so i wont have to go and buy that Chevy Volt cause the Sportster is just to small but that new '48 is badd a$$.
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Road Master
Joined: Oct 2009
Posts: 860
Likes: 1
From: Deep South Texas
I had the same setup on my bike and it does work I was able to get 46mpg when cruising at 65mph, I was just always worried i was running too lean and would burn valves and possibly holes in the piston. I noticed that the filament on my number 1 cylinder spark plug would warp after a lean ride like that and i would have to reset the gap, I took that as an indication that I was running too lean. What I would like to know what would it take for the MoCo. to make the 2012 touring models get at least 60mpg so i wont have to go and buy that Chevy Volt cause the Sportster is just to small but that new '48 is badd a$$.
Last edited by Sancho; Mar 31, 2010 at 09:48 AM.
Extreme HDF Member
Joined: Sep 2005
Posts: 11,615
Likes: 50
From: Baton Rouge, LA
FWIW, I did a write-up here on using the switch with Auto-Tune, which works a bit different than for the basic PCV.
Last edited by iclick; Apr 2, 2010 at 10:04 AM.
Extreme HDF Member
Joined: Sep 2005
Posts: 11,615
Likes: 50
From: Baton Rouge, LA
Yes! But you'll need to buy the Multifunction Hub, which is $150. I happen to have one I'll sell for $75 if anyone's interested. I used it along with a map switch on my bike before buying the PCV, which doesn't require the hub.
Extreme HDF Member
Joined: Sep 2005
Posts: 11,615
Likes: 50
From: Baton Rouge, LA
I wondered the same thing about running to lean. Running too lean should make your engine run hotter and the oil as well I would think. That's why I included the oil temp. The way mine is set up it is only running lean from 5% to 20% throttle position. Over 20% TP and it runs like the richer map. In addition I have faith in Jamie at Fuelmoto. I think he took that into consideration when he programmed my map for improved mpg.
I don't think running stock AFR's will cause problems, especially if you are running an oil cooler, which I consider essential with any TC engine. My oil temps are very reasonable, running 180-205° while cruising depending on outside temp, up to 230° rarely in heavy summer traffic. Keep in mind that with the map switch you have the option of switching to a richer AFR setup when needed, and I only do this on rare occasions.
Last edited by iclick; Mar 31, 2010 at 04:34 PM.
Grand HDF Member
Joined: Mar 2007
Posts: 4,928
Likes: 285
From: Edmond Oklahoma
I get about 45mph on my 09 SG if I limit my speed to 65 (which I rarely do). So wouldn't just leaving the other setting to stock give the better mileage without risking over heating.
Beary
Beary
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Road Master
Joined: Oct 2009
Posts: 860
Likes: 1
From: Deep South Texas
I'm not sure I understand what "other setting" you are talking about. Maybe ICLICK can chime in here. I got most of my info from him to begin with.
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Extreme HDF Member
Joined: Sep 2005
Posts: 11,615
Likes: 50
From: Baton Rouge, LA
I'm not sure either, but he may be responding to my comment on the PCV map switch. If so I'll try to answer his question here. I run about stock AFR's in the cruise range most of the time, but am able to switch to a richer setting whenever the going gets hot and I need extra cooling, which is rare even in summer. The oil cooler helps greatly to keep temps under control, and will extend the time you can spend idling in traffic. My write-up mentioned above explains it in detail, but is specific to the PCV-AT. The basic PCV will also function with a map switch, but the way it works is different. I know of no other tuner that has the ability to switch between two or more maps.
Last edited by iclick; Apr 2, 2010 at 10:14 AM.
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Road Master
Joined: Oct 2009
Posts: 860
Likes: 1
From: Deep South Texas
My *** dyno can't tell the difference between the 2 maps. But apparently the gas pump can. Living in a rural area I anticipate using the leaner map 95% of the time or more. It certainly will be nice to run richer with the flip of a switch when the need arrises. I will be making a 350 mile trip this month which will give me a better feel for the mileage improvement. I will be checking my mileage again with this tank of gas for my normal riding. With a PCV and the 2 maps from fuelmoto my bike is running great. And, I can't say enough good things about Fuelmoto. In addition to ICLIK's knowledge base.