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ECM/Fuel Management systems ECM/Fuel Management systems For Road Glides

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post #1 of 13 (permalink) Old 08-04-2016, 04:23 PM Thread Starter
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FP3 and Fuel Mileage/MPG Questions

First a little background. I have a 2015 RGS that I bought used from my dealer, and it came with the Arlen Ness Big Sucker, V&H power duals and screaming eagle mufflers (not sure of exact model). A guy at the dealer mentioned that it had a SERT tune done to it, but I am not positive and don't know how to find out. This is my first Harley and I am not well versed in all of this performance tuning stuff yet (trying to learn more).

I've filled up my tank 3 times now and I am only getting 36 mpg. So first question, is that normal? Seems kinda low to me. My last tank got me 198 miles and took 5.5 gal of gas. I am putting only premium (91) gas in her. Solo riding 95% of the time. Combination city and highway, but mostly short trips back/forth to work 7 miles each way.

Next, I have been reading a lot about the Vance and Hines FuelPak3 and really like the interface and rave reviews about it. Would putting one of these on my bike possibly correct my mpg issue? I like the way my bike runs right now, but maybe it could run even better with the FP3.

If I did get the FP3 and put it on my bike, would it save the current tune that is on there even though it might be from a different brand tuner? I would worry that if I got the FP3 and wanted to get back to the tune I have now, that I wouldn't be able to.


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'15 FLTRXS - V&H Power Duals w/ Screamin' Eagle Street Cannons - Arlen Ness Big Sucker - BT4180.14 w/Arc Moto 602v2 and Polk MM652 - Le Pera Maverick Daddy Long Legs - Advan Lowers - Freedom Shield 15"
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post #2 of 13 (permalink) Old 08-04-2016, 04:55 PM
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As far a fuel mileage mine varies depending on my riding and location. I have a V&H FP3 and get from 36 to 43. As far as the saving the map. When you install the FP3 it will take the stock map, in your case your map and copies and stores it so it is always available.


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post #3 of 13 (permalink) Old 08-04-2016, 05:15 PM
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If they put the fuel to it to cool it down when they dyno ed it. That will effect milage. I have an fp3 on my 16 and I get 200 to 210 out of a tank. Usually 5 gallons to fill it up. That's exactly tell same as when I bought it. Only difference I noticed was the bike ran a ton better. The FP3 will save the map you have now so you can flop from the FP3 tune to this one and see. But as soon as you plug it in its married to the bike. Same as the sert.

I don't put a lot of stock into these Harley dealership dyno guys. They do it when they have to. I had a better tune on my SG done at an event in an hour. It's all they do. Performance Solutions.

Me, now that I have an FP3 and never intend on doing cams. Will only ever run a FP3. I've had a PC5 and a SEPRT. Pro race tuner. Different from the standard SERT.

I'd swap it out. But that's me.


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post #4 of 13 (permalink) Old 08-04-2016, 08:27 PM Thread Starter
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Well here's an interesting turn of events...

So I get home from work and decide to remove the saddle bag and pull the side cover so I can see where the tuner would go. Get the cover off and bam, right smack in front of me is a Vance and Hines FP3 hooked to the bike! I couldn't believe it.

I immediately downloaded the app and updated all the firmware etc and was talking to the bike within 10-15 minutes. There were three tunes on it - stock (read only), one for air cleaner with v&h power duals and HO mufflers, and one that was Autotune.

I couldn't tell which one the bike was using, but I selected to do a new Autotune using the old Autotune map as the starting point. I'll ride it to work tomorrow and see what kind of data gets imported. As I said previously, I know nothing about this stuff!
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post #5 of 13 (permalink) Old 08-04-2016, 08:42 PM
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Not shocking the dealer didn't know what he was talking about. You can see your fuel tables and see what the AFR is set at. The previous owner may have changed them himself.

If it were me I'd dump the 2 maps and start fresh. Load the map configuration for your set up yourself and then ride it a tank or 2. See how that goes. Then run the auto tune. At least you will have no doubt what it's set at.


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post #6 of 13 (permalink) Old 08-04-2016, 08:57 PM
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New tune. Look up the parts you have installed and blamo!! I won't auto tune till I add more parts. They update those things all the time. Guy's on the forums are saying until you have true duals, this muffler that cam...it's not worth it.

Saying all that...it will not hurt it. I don't know if you can start and stop the process...may have to do it in one sitting. Not sure the 7 mile trip will get it but hey. Give it a shot! Also you wanna see the fon so you can see the squares as you fill them in by riding. Think of it as an empty checker board. The bottom left corner is drag racing and the top right is cruise control on the interstate for 30 min. I made those up but what I'm saying is you have to do every maker of riding you can do your bike will learn
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post #7 of 13 (permalink) Old 08-04-2016, 09:10 PM
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Spend some time in this thread.

https://www.roadglide.org/21-ecm-fuel...explained.html


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post #8 of 13 (permalink) Old 08-05-2016, 12:01 AM
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Gotta say that I don't know if I get anything better than 36? Maybe it's 45? Dunno. Don't really care... it's a motorcycle.
One of the things I've always enjoyed about riding is that it allows me to escape from thinking about shit... so fuel efficiency ain't on the agenda.

I fill it up when it needs fuel. Sometimes I fill it up when it doesn't need fuel, but I need to stop. The range usually says about 240 miles or so when it's full, but I usually need to stop before going that far these days. You young guys may not get that - but, in time, you will.

I always use 91 octane, unless it's not available.
110 with stock high-flow intake along with V&H Power Duals, 450 OS Titans & FP3.
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post #9 of 13 (permalink) Old 08-05-2016, 12:11 AM
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I had the FP3 on my street glide and loved it.
You have the ability to autotune to adapt to your riding style and also to adjust lots of parameters if you know what you are doing.

Yes my fuel consumption did go worse but if you allow more air in you have to burn more fuel.

Oh yes - your right hand on the throttle can also make it worse!!
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post #10 of 13 (permalink) Old 08-05-2016, 04:26 AM
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Quote:
Originally Posted by Wharf Rat View Post
Gotta say that I don't know if I get anything better than 36? Maybe it's 45? Dunno. Don't really care... it's a motorcycle.
One of the things I've always enjoyed about riding is that it allows me to escape from thinking about shit... so fuel efficiency ain't on the agenda.

I fill it up when it needs fuel. Sometimes I fill it up when it doesn't need fuel, but I need to stop. The range usually says about 240 miles or so when it's full, but I usually need to stop before going that far these days. You young guys may not get that - but, in time, you will.
That's my outlook. Not concerned at all. Just like my lifted 2500HD. If I was worried about gas mileage I'd own a prius. Nah. Not me. Wife drives an H3. We're a tree huggers nightmare.


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