Power Vision Information Thread
So where do the "fuel used" and mpg values come from??
I have to assume that the amount of fuel used is based on injector duty cycle, which I assume is also included in the VE calculations, not??
So if one is off they'd all be off by an equal amount.
It appears, based off of GPS readings that my speedo is dead on, or VERY close, depending on how much you believe GPS readings.
I have to assume that the amount of fuel used is based on injector duty cycle, which I assume is also included in the VE calculations, not??
So if one is off they'd all be off by an equal amount.
It appears, based off of GPS readings that my speedo is dead on, or VERY close, depending on how much you believe GPS readings.
Let me try to explain....
VE is the predicted airflow model of the engine, it is used along with the lookup tables to determine fuel delivery requirements, while PV Trip Center is simply a channel that displays "estimated" MPG etc.. like the distance to empty on your odometer (how accurate is that?) The Trip Center is based on algorithms used and stored by the speedo cluster. The Fuel used and MPG in the PV trip center are simply displayed values based on outputs, they are not ECM inputs.
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Jamie Long / Fuel Moto USA
The USA's Leader V-Twin EFI & Performance www.fuelmotousa.com
Contact 920-423-3309
Email jamie@fuelmotousa.com
Jamie Long / Fuel Moto USA
The USA's Leader V-Twin EFI & Performance www.fuelmotousa.com
Contact 920-423-3309
Email jamie@fuelmotousa.com
Cruiser
Joined: Aug 2011
Posts: 229
Likes: 11
From: East Iowa
I realize this, the fuel used number is an output. However, when I have to add a percentage to that number in order to correct it, that means that whereever that number came from was inaccurate, which also means every other place that number was used is potentially screwed up too.
I know that injector outputs can be all over the map, has Fuel Moto ever played with the OEM Harley injectors to see how consistent they are??
I know that injector outputs can be all over the map, has Fuel Moto ever played with the OEM Harley injectors to see how consistent they are??
Road Master
Joined: Jun 2006
Posts: 871
Likes: 7
From: Manchester, NH
2. You can also, from the Main Menu of the PV:
Select Vehicle Tools/Select Reset Trims
Road Master
Joined: Jun 2006
Posts: 871
Likes: 7
From: Manchester, NH
And/or if you have changed anything in the AFR/Lambda fueling tables.
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Joe Kucinski
Road Master
Joined: Jun 2006
Posts: 871
Likes: 7
From: Manchester, NH
I don't believe so. When you begin the autotune process the AFR/Lambda values are changed globally. When you export the values learned the AFR/Lambda values are changed back to the original values; (haven't changed) and, you can ride and let the learned values accumulate. You have to physically change the values in the AFR/Lambda Fuel Table. For example, you are using a value of .981 in the cruise area of the table. You want to try and get a little better fuel economy and change those values to .986. You would then have to reset the trim.