Power Vision Information Thread
Cruiser
Joined: May 2010
Posts: 127
Likes: 0
From: Las Vegas, NV
Used the Log Tuner software over the weekend to fine tune the file from Fuel Moto supplied with my PV. Worked great! Did 3 data runs and after the last one when I did the compare there were no changes. Bike now has very little deceleration pop and no more knocking under hard acceleration.
Has anyone figured out how to adjust the fuel rate reading in the PV? When using the MPG and fuel used function, it is reading approx 18% less fuel than what is being used and makes my MPG reading way off.
I will be adding a new cam during the next few weeks and will be getting the AT-100 wideband sensors when I do. I noticed that the Log Tuner software supports running both the stock and wideband sensor in parallel. I was thinking of adding another set of sensor bungs to my headpipes to support this. Any ideas of what I might need for extra cables/splitters and if the PV will work with this setup once the AutoTune feature is available?
Has anyone figured out how to adjust the fuel rate reading in the PV? When using the MPG and fuel used function, it is reading approx 18% less fuel than what is being used and makes my MPG reading way off.
I will be adding a new cam during the next few weeks and will be getting the AT-100 wideband sensors when I do. I noticed that the Log Tuner software supports running both the stock and wideband sensor in parallel. I was thinking of adding another set of sensor bungs to my headpipes to support this. Any ideas of what I might need for extra cables/splitters and if the PV will work with this setup once the AutoTune feature is available?
Last edited by sbaalman; May 31, 2011 at 03:08 PM. Reason: spelling
Cruiser
Joined: Jan 2011
Posts: 125
Likes: 0
From: Rowlett, TX
I am by far no expert, but seems to me all you are doing with the Stock 02 sensors and log tune is leaning out your motor.. IMO ya it's fun to play with log tune, but not sure I am too inclined to take fuel away from my VE tables, especially in the 2800-4000 rpm range.
The values in the AFR table are in essence, a 'target' mixture that your ECM is trying to attain. However, with narrow band sensors, this target has to be an AFR of 14.6, or else it falls out of closed loop operation. So I think you're saying 'what's the point?', if the only 'target' we can aim for with NB sensors is stoich? Right?
Well, the answer is this... we're all fooling the ECM into thinking a mixture is leaner than it really is by varying the CLB values. Larger values in these tables result in the sensors reporting a leaner condition than what really exists, so the ECM richens up the mixture to compensate. For example, this is a screenshot of the comparison between the FM tune and my stock (stage II harley download) tune closed loop bios tables.....
Note how much smaller the stock tune CLB values are in the cruise range... These higer values will yield a richer final tune, even if logtuner leans up the mixture some along the way.
This is how we keep from autotuning our way right back to a mixture that's just as lean as the one with which we started! I think:-)
Last edited by aclundwall; May 31, 2011 at 02:19 PM.
Outstanding HDF Member
Joined: Jan 2007
Posts: 2,598
Likes: 19
From: Naples FL / Pine TWP PA
Oh wow, I was so busy putting my bike together and going to Rolling Thunder I missed this information. I'm glad this is out because my map is off quite a bit. Roll on throttle is pinging all over the place. Although I do have a request in for Jamie to write me a map update.
Today,
Tested my first corrected map, made a new logfile for my 2nd round of corrections. First Impressions: Idle is the best it's been since the cam install. Off-idle is also improved.
Tonight,
Created a new map using today's new log, loaded it on the PV to test tommorrow.
My 2cents:
I really like the way the "Log tuning" works. Because it is not automatic, we are directly involved in the tuning of our bikes. We get to see the changes that are being made, then we get to feel the difference those changes make. For those of us with Power Vision Tuners, these are exciting times!
Tested my first corrected map, made a new logfile for my 2nd round of corrections. First Impressions: Idle is the best it's been since the cam install. Off-idle is also improved.
Tonight,
Created a new map using today's new log, loaded it on the PV to test tommorrow.
My 2cents:
I really like the way the "Log tuning" works. Because it is not automatic, we are directly involved in the tuning of our bikes. We get to see the changes that are being made, then we get to feel the difference those changes make. For those of us with Power Vision Tuners, these are exciting times!
Stellar HDF Member
Joined: Sep 2007
Posts: 2,459
Likes: 674
From: Vancouver Island B.C.
This is my .02$
Well, the answer is this... we're all fooling the ECM into thinking a mixture is leaner than it really is by varying the CLB values. Larger values in these tables result in the sensors reporting a leaner condition than what really exists, so the ECM richens up the mixture to compensate. For example, this is a screenshot of the comparison between the FM tune and my stock (stage II harley download) tune closed loop bios tables.....
Note how much smaller the stock tune CLB values are in the cruise range... These higer values will yield a richer final tune, even if logtuner leans up the mixture some along the way.
This is how we keep from autotuning our way right back to a mixture that's just as lean as the one with which we started! I think:-)
Well, the answer is this... we're all fooling the ECM into thinking a mixture is leaner than it really is by varying the CLB values. Larger values in these tables result in the sensors reporting a leaner condition than what really exists, so the ECM richens up the mixture to compensate. For example, this is a screenshot of the comparison between the FM tune and my stock (stage II harley download) tune closed loop bios tables.....
Note how much smaller the stock tune CLB values are in the cruise range... These higer values will yield a richer final tune, even if logtuner leans up the mixture some along the way.
This is how we keep from autotuning our way right back to a mixture that's just as lean as the one with which we started! I think:-)
Outstanding HDF Member
Joined: Jan 2007
Posts: 2,598
Likes: 19
From: Naples FL / Pine TWP PA
I just hope they get to the level of TTS because a refined tune that makes power is certainly possible using the narrow band 02 sensors. This is proven by TTS Mastertune.
Cruiser
Joined: Mar 2009
Posts: 228
Likes: 0
From: Texas
It's not like the TTS and SEPST are brand new technology, they have been out for years. I can't believe DJ would put out a "Revolutionary" new tuner/software program that aren't even set up to perform the basic functions that the "Old" tuners already on the market can. Bummer.
Last edited by 883_dave; Jun 1, 2011 at 08:10 AM.
Outstanding HDF Member
Joined: Jan 2007
Posts: 2,598
Likes: 19
From: Naples FL / Pine TWP PA
Well I will give them time, but I'm certainly not opposed to using TTS if DJ doesn't meet the benchmark. I'm not wiring an AT100 into my bike.
HD Forum Stories
The Best of Harley-Davidson for Lifelong Riders
7 Surprising Harley-Davidson Products that Are Not Motorcycles
Verdad Gallardo
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
Are you not happy with the tuning METHOD, or are you not happy with the RESULTS? At least try it before you bail out.