Power Vision Information Thread
Cruiser
Joined: Mar 2009
Posts: 228
Likes: 0
From: Texas
Does anyone here know if the Adaptive Fuel and Idle trims should be reset each time a new tune is flashed to the ECM? The manual recommends resetting them prior to each tuning session, but doesen't say what to do when flashing a new custom tune. Seems like the more I get into playing with the PV the more questions I have.
Advanced
Joined: Oct 2010
Posts: 62
Likes: 1
I know with the tuning software i use for my car every time you flash the ecu it automatically clears any learned fuel and idle trims. I think it is the same for PV but hopefully someone that knows for sure will let you know.
Thread Starter
|
Extreme HDF Member
Joined: Sep 2005
Posts: 11,615
Likes: 50
From: Baton Rouge, LA
In the AFR tables, higher values mean leaner mixtures. But in the VE tables, higher values would be richer. So in the WinPV software, the AFR table is a sub-section of the "Fuel" tune items. And the VE table is a sub-section of the "Airflow" tune items. Seems like they should be reversed, IMO.
If you raise values in VE, you're adding "FUEL", If you raise values in AFR, you're adding "AIR"... well, kinda?... Oh well, no biggie, sounded good in my head.
Does anyone here know if the Adaptive Fuel and Idle trims should be reset each time a new tune is flashed to the ECM? The manual recommends resetting them prior to each tuning session, but doesen't say what to do when flashing a new custom tune. Seems like the more I get into playing with the PV the more questions I have.
__________________
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
VE is a direct representation of the airflow model based on cylinder fill and the ECM uses this to calculate fuel requirements, raising this value richens the mixture while lowering leans the mixture. The AFR/Lambda table is essentially a table that represents the AFR the VE table was calibrated to. For example, if VE is synchronized correctly the AFR/Lambda table should reflect the actual mixture going out the tailpipe. On O2 sensor equipped bikes featuring calibrations with an AFR table this table along with the O2 bias table are used as a closed loop control however the AFR must be set to 14.6 to trigger closed loop, you then use the O2 bias table to set the value the ECM is looking for. Lambda based calibration use the lambda value itself as a control and closed loop is triggered with values of .98-1.02. Whether you have a Lambda or AFR calibration, the calibration give you the ability to set the closed loop area from approx 14.30-15:0:1 AFR as an end result, if you are looking for a richer (or leaner) mixture it will be open loop.
Hope this info helps
Hope this info helps
Advanced
Joined: Apr 2007
Posts: 82
Likes: 1
From: Idaho Falls, ID
That's the way I did it. My AT-100 and eliminators are still in place, although the latter don't need to be installed after if you run the PCV import feature. When you do that it inserts 14.5 where 14.6 existed before, and that disables closed-loop negating the need for the eliminators. I would just leave them in unless you decide to go back to the stock O2 sensors, which is doubtful since you have the AT-100 installed.
Thanks iclick.
Road Captain
Joined: Aug 2008
Posts: 528
Likes: 4
From: Alberta Canada
Can anybody explain how to calibrate the speedometer? I see in WinPV there is a speedometer calibration & gear ratio in the stock tune but only gear ratio in the Fuelmoto tune. How does this work?, I would like an accurate speedometer.
HD Forum Stories
The Best of Harley-Davidson for Lifelong Riders
8 Best Harley-Davidson Motorcycles Ever
Pouria Savadkouei
10 Worst Harley-Davidson Motorcycles Ever
Pouria Savadkouei
Killer Custom's Jail Break Is The Breakout That Refused to Blend In
Verdad Gallardo
Crazy Bunderbike Build Looks Amazing, But Is It Impossible to Ride?
Verdad Gallardo
Harley-Davidson Reveals Super Cool Cafe Racer Concept
Verdad Gallardo
Engraved Rebellion: Inside Bundnerbike's Glam Rock II
Verdad Gallardo
10 Motorcycles You Should Never Buy
Joe Kucinski
10 Things Harley-Davidson Needs to Fix in 2026
Verdad Gallardo
Southpaw Super Glide: A Left-Hand-Drive 1979 Harley FXE Built to Fit the Rider
Verdad Gallardo
Thread Starter
|
Extreme HDF Member
Joined: Sep 2005
Posts: 11,615
Likes: 50
From: Baton Rouge, LA
Use the Speedometer Calibration setting. Raise it to lower the reading on the speedometer and vice versa. As a reference, my original value was 2058 and my speedometer was 4% fast (reading about 62.5mph at an actual 60mph) and 2135 was the right number to get it spot-on with my GPS.
The odometer changes with the Speedometer Calibration, so if the speedo reading is reduced by 4% so is the odometer, or at least that's the case on my bike. Originally, my odometer was 2% fast and changing the Speedometer Calibration made the odometer 2% slow, but that doesn't concern me as much as an errant speedometer.
Oddly, what the mechanical speedometer and ECM read as the speed are different. If you'll assign a gauge to the ECM speedometer signal ("Vehicle Speed" I believe it's called, or similar) you'll see the disparity, but I can't see a downside to having the ECM speed a bit high or low. I don't even know what that signal does in normal riding.
The odometer changes with the Speedometer Calibration, so if the speedo reading is reduced by 4% so is the odometer, or at least that's the case on my bike. Originally, my odometer was 2% fast and changing the Speedometer Calibration made the odometer 2% slow, but that doesn't concern me as much as an errant speedometer.
Oddly, what the mechanical speedometer and ECM read as the speed are different. If you'll assign a gauge to the ECM speedometer signal ("Vehicle Speed" I believe it's called, or similar) you'll see the disparity, but I can't see a downside to having the ECM speed a bit high or low. I don't even know what that signal does in normal riding.
Last edited by iclick; Apr 7, 2011 at 09:52 AM.
Road Captain
Joined: Aug 2008
Posts: 528
Likes: 4
From: Alberta Canada
Use the Speedometer Calibration setting. Raise it to lower the reading on the speedometer and vice versa. As a reference, my original value was 2058 and my speedometer was 4% fast (reading about 62.5mph at an actual 60mph) and 2135 was the right number to get it spot-on with my GPS.
The odometer changes with the Speedometer Calibration, so if the speedo reading is reduced by 4% so is the odometer, or at least that's the case on my bike. Originally, my odometer was 2% fast and changing the Speedometer Calibration made the odometer 2% slow, but that doesn't concern me as much as an errant speedometer.
Oddly, what the mechanical speedometer and ECM read as the speed are different. If you'll assign a gauge to the ECM speedometer signal ("Vehicle Speed" I believe it's called, or similar) you'll see the disparity, but I can't see a downside to having the ECM speed a bit high or low. I don't even know what that signal does in normal riding.
The odometer changes with the Speedometer Calibration, so if the speedo reading is reduced by 4% so is the odometer, or at least that's the case on my bike. Originally, my odometer was 2% fast and changing the Speedometer Calibration made the odometer 2% slow, but that doesn't concern me as much as an errant speedometer.
Oddly, what the mechanical speedometer and ECM read as the speed are different. If you'll assign a gauge to the ECM speedometer signal ("Vehicle Speed" I believe it's called, or similar) you'll see the disparity, but I can't see a downside to having the ECM speed a bit high or low. I don't even know what that signal does in normal riding.