t max bad mpg
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Road Master
Joined: Sep 2006
Posts: 977
Likes: 184
t max bad mpg
I install my tmax unit I also clear the learn fuel adjustment and learned idle control adjustment, did the warm up procedure. After 86 miles I check the mpg and it is about 26.5 I have been riding in the city and country but this seems a little low. Is this normal until the bike gets some more miles on it. I wonder if my timing is retarded to fare
07 road king
big sucker a/c
rush slip-ons 2.0
map 392 lean out the cruse range 2816-3072 from 13.5 to 13.8
Cruiser
Joined: Feb 2006
Posts: 186
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From:
RE: t max bad mpg
Yeah, thats way low. Unless you are doing a lot of dragging. I have the exact set up on my 07 Roadglide as yours. Big sucker and 2.0 Rushes. I went with the Fuelpak and have been averaging around 38 to 42 on combined city-hwy. I'm very pleased with the results.
I would look at the set-up with the t-max again. See if there is a change you can make. I don't know a lot about them, but I would change the settings. If that doesn't work think about returning the t-max and go with a different fuel management system.
I would look at the set-up with the t-max again. See if there is a change you can make. I don't know a lot about them, but I would change the settings. If that doesn't work think about returning the t-max and go with a different fuel management system.
Outstanding HDF Member
Joined: Feb 2007
Posts: 2,710
Likes: 6
From: Spokane, WA.
RE: t max bad mpg
Got a Tmax with Auto tune- I called Pete at Zippers and he walked me through my set up and Map- I am not a ( PC Tech type person ).
I did a download of latest version software, and cleared out settings and went for the new map he suggested.
Bike got about 42- 44 mpg before I changed in cams. Also, short rides of 15 miles or so were recommended so Tmax would learn quicker than just doing a long Hwy ride.
Tourer
Joined: Mar 2006
Posts: 294
Likes: 3
From: Pacific Northwest
RE: t max bad mpg
Funny~I'm looking for the same answer. My mpg averages around 28 and I do 12 miles back and forth every day to work. I was starting to think it was the fact that I start up/warm up twice daily and do a relatively short trip. I've been "thinking mpg" every day and not blipping the throttle and not really doing much of a warm up, just getting the oil flowing and warm cylinders and go. Checked yesterday and 28.82mpg! I was kind of reserving judgement till I get a chance to take a longer trip, but the weather has been crappy lately.
I also went through a little bad patch with my tmax shutting off completely and actually took to riding with the stock ecm and a roll of duct tape in the saddle bag. Called them up and they sent me an updated version of the firmware and I cleared and reloaded everything. I'm about 250 miles on this setup and haven't had any further problems, but they didn't start showing up the first time until I had miles on the setup, so. . . .
Back to the fuel economy thing~Does anyone have any ideas what to do here? My mpg wasn't THAT great before I changed the ECM. In fact, come to think about it it was very nearly the same. I always put in about 4-4.5 gallons right around 132 miles or so. I'm 6'3" and weigh 220, but I see guys riding full on UltraClassics whoare MUCH bigger than me and claiming 45-50 mpg. Hmmm
I also went through a little bad patch with my tmax shutting off completely and actually took to riding with the stock ecm and a roll of duct tape in the saddle bag. Called them up and they sent me an updated version of the firmware and I cleared and reloaded everything. I'm about 250 miles on this setup and haven't had any further problems, but they didn't start showing up the first time until I had miles on the setup, so. . . .
Back to the fuel economy thing~Does anyone have any ideas what to do here? My mpg wasn't THAT great before I changed the ECM. In fact, come to think about it it was very nearly the same. I always put in about 4-4.5 gallons right around 132 miles or so. I'm 6'3" and weigh 220, but I see guys riding full on UltraClassics whoare MUCH bigger than me and claiming 45-50 mpg. Hmmm
Thread Starter
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Road Master
Joined: Sep 2006
Posts: 977
Likes: 184
RE: t max bad mpg
I thought that was pretty bad mpg I will give it 200 miles and see what happens before I adjust any thing but I think that the timing is to retarded in the cruse range. The thing I can not understand is how you know if you are to advance I think it will ping. At idle it runs ruff I move the timing up to see what happens and the bike seem to run smoother but I chicken out and put it back.
Road Master
Joined: Feb 2007
Posts: 1,205
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From: Arizona
RE: t max bad mpg
Your not going to get good fuel mileage running in the 13's AFR for your cruise setting. By default the Tmax runs in the low 13's in closed loop mode.
I know we are all stigmatized to thinking running in the 14's is bad as that is where the stock setup is. But your not going to get good fuel mileage until you bring your cruise up into the 14's range. Remember your bike is going 65 to 70 mph. The wind is blowing through the cooling fins doing its job. Where the stock bike runs into problems is being set too high at idle or close to idle when the air moving by isn't enough to cool the bike. Don't be afraid and try different settings in the 14's at cruising speeds. Try 14.2 and see how she does.
I know we are all stigmatized to thinking running in the 14's is bad as that is where the stock setup is. But your not going to get good fuel mileage until you bring your cruise up into the 14's range. Remember your bike is going 65 to 70 mph. The wind is blowing through the cooling fins doing its job. Where the stock bike runs into problems is being set too high at idle or close to idle when the air moving by isn't enough to cool the bike. Don't be afraid and try different settings in the 14's at cruising speeds. Try 14.2 and see how she does.
Thread Starter
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Road Master
Joined: Sep 2006
Posts: 977
Likes: 184
RE: t max bad mpg
Sounds good I will raise the afr to 14.2 and see what happens. At stock it was 14.7 but 26.5 to a gal. It got to be something else. I know that when I put the Tmax on my bike my bike runs hotter then with the power commander and the sert; I use to worry about it not being hot enough to evaporate the moister in the engine.
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Cruiser
Joined: Apr 2007
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RE: t max bad mpg
Guys, here's a graph I got from another site. Set your throttle positions up like this from 1792 to 3584 RPM. You'll get good mileage at cruise and have good power when you twist it. You can tweak it to your liking from here.
[IMG]local://upfiles/29873/AB6CEB7E146F426780921B5FEFFAD1B1.jpg[/IMG]
[IMG]local://upfiles/29873/AB6CEB7E146F426780921B5FEFFAD1B1.jpg[/IMG]
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Thread Starter
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Road Master
Joined: Sep 2006
Posts: 977
Likes: 184
RE: t max bad mpg
Thanks I will try this map to see what happens. Can anybody out there with a 07 send me a copy of your map so I can compare it with mine. ubreal@charter.net
Thank you
bob
Thank you
bob
6th Gear
Joined: Nov 2007
Posts: 11
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From:
RE: t max bad mpg
Hey fxrp, Can I ask you what site you got the map from that you posted here. Just love doing Tmax research. Email me ( bluhogrider@yahoo.com)
[IMG]local://upfiles/48346/00DBE997FC8743CAAAF727AB17A7F163.jpg[/IMG]
[IMG]local://upfiles/48346/00DBE997FC8743CAAAF727AB17A7F163.jpg[/IMG]