Power Vision Information Thread
Intermediate
Joined: Jan 2012
Posts: 34
Likes: 0
From: Anchorage, Alaska
I requested and received a map from FM to start my tuning runs. After 3 tuning runs I found that the PV was wanting to remove a lot of fuel from the map (in some areas 15% - 20%). If I compare the map produced by the PV it is even leaner than the "stock improved" map on PV website.
Disco down
Disco down
VE tables are about mapping the actual airflow for the engine. Fuel control is the Lamda or AFR based fuel table. The fuel table sets the target mix, the VE tables allow the ECM to calcuylate how much fuel is needed to hit that mix at that rpm/etc.
Sure, increasing the VE table value has the effect of "richening the mixture", but only if you are running open loop. Otherwise, the ECM will "correct things".
But, there is a limited range of correction. The ideal is that the VE tables be accurate for normal conditions and the fuel tables set to prefered mix. That way, when the environment changes (some bad fuel, major temp or altitude change, etc.) the ECM still has the max +/- adjustment range.
As far as the shift in values...
1) Every bike is a bit different.
2) Local environ (fuel, air temp, pressure, etc) does have an effect.
3) Better to error on the VE high side than low, specially in open loop areas.
All of the maps I got from FM were a mix of changes, som areas increasing, others dropping, no biggie. Important thing being _accurate_ VE tables so that what you set in the fuel table is actually what you get.
Intermediate
Joined: Jan 2012
Posts: 34
Likes: 0
From: Anchorage, Alaska
Flash the bike, then read-back the tune from the ECM and load back into computer. The bike already as them, this will combine the new values from the FM map with those already in the bike. Remember, most of the tunes you will receive/see only set the general options, local/specific stuff (CDE tables, temp tables, etc) is generally not included.
Intermediate
Joined: Jun 2010
Posts: 45
Likes: 0
From: 3 rd rock
Disco....yes sir mine did the same thing. i was thrown by it as well. I have emailed fuel moto because i was worried about it not being correct. I had drops all the way out to the higher rpm,s and kpa,s. After talking to Jamie at fuel moto i feel better now and am convinced that this is just what my heads are looking for.
This does not mean we wont have to make modifications to our A/F table or spark table to get better performance but this is the flow our heads are looking for at certain rpm and kpa ranges.
After this happened i thought for sure my bike was going to run like crap and ping. I have neither from these changes. The bike is actually running better.
I have questioned it because some here on the forum have questioned the powervisions ability to be accurate in certain areas....jamie confirmed what i had thought...The AT runs take the eintire A/F table to 14.6. The narrow band sensors are very accurate at this value. Good data is being seen no matter the rpm or kpa. So if you are using the AT feature i would say that is what your bike wants in thoes areas and you will be fine.
This does not mean we wont have to make modifications to our A/F table or spark table to get better performance but this is the flow our heads are looking for at certain rpm and kpa ranges.
After this happened i thought for sure my bike was going to run like crap and ping. I have neither from these changes. The bike is actually running better.
I have questioned it because some here on the forum have questioned the powervisions ability to be accurate in certain areas....jamie confirmed what i had thought...The AT runs take the eintire A/F table to 14.6. The narrow band sensors are very accurate at this value. Good data is being seen no matter the rpm or kpa. So if you are using the AT feature i would say that is what your bike wants in thoes areas and you will be fine.
OK, that make sense. As I mentioned, the bike runs good. I was concerned about getting into a 105 temp day and have the thing ping like heck due to being lean. When I get some weather like that I'll make sure I have the PV with me so I can fatten up a little in case I need to.
Thanks Boston and Cbrown!
Disco down
Intermediate
Joined: May 2012
Posts: 47
Likes: 1
From: Texas
Flash the bike, then read-back the tune from the ECM and load back into computer. The bike already as them, this will combine the new values from the FM map with those already in the bike. Remember, most of the tunes you will receive/see only set the general options, local/specific stuff (CDE tables, temp tables, etc) is generally not included.
Pat at DynoJet Quote:
"You can update any tune that you have to show the latest tables available. To do this please make sure your Power Vision unit is up to date by using the Update Client. With the latest version of firmware in the Power Vision and it connected to your computer, open the tune you want to update. Once the tune is open click on Power Vision in the software and it will have a drop down menu. From this menu select Update tune using PV. This will run the tune back though the device and update the tune."
Extreme HDF Member
Joined: Aug 2012
Posts: 11,392
Likes: 184
From: Big ol Titties
Edit: just saw you posted this same answer while i was typing/posting this.
Last edited by Uncle Chester; May 6, 2013 at 07:13 PM.
man roy at powervision really needs to work on his customer skills
he calls me to take payment of my dual license, i miss his call
i call him back , he says hold on while i finish typing up some paperwork
im waiting a good 10min
he then takes my payment and emails me my code
go to put code in....no work, look at what he sent me and the unlock code powervision serial number is not my serial number
for those that have not done this, you dont type them your serial number you send them a file that the powervision generates for you that way you dont miss type it
i look at the file i gave them and the serial number is totally off
so now im at home dynojet is closed and gotta wait to hear from him tomorrow
yeah no big deal i know but from the getgo waiting 10min for him to finish typing was lame then giving me the wrong code for some other serial number jeeeeeeeeeeeeeez
he calls me to take payment of my dual license, i miss his call
i call him back , he says hold on while i finish typing up some paperwork
im waiting a good 10min
he then takes my payment and emails me my code
go to put code in....no work, look at what he sent me and the unlock code powervision serial number is not my serial number
for those that have not done this, you dont type them your serial number you send them a file that the powervision generates for you that way you dont miss type it
i look at the file i gave them and the serial number is totally off
so now im at home dynojet is closed and gotta wait to hear from him tomorrow
yeah no big deal i know but from the getgo waiting 10min for him to finish typing was lame then giving me the wrong code for some other serial number jeeeeeeeeeeeeeez
i just hope when i call they dont try and say it was the right serial even though the email i gave him with the file shows a totally different serial number, when you pay $200 for just a unlock code you expect it to be right
they might think im trying to get over on them and get another unlock code which i hope they dont think
they might think im trying to get over on them and get another unlock code which i hope they dont think
Road Captain
Joined: Apr 2009
Posts: 531
Likes: 4
From: Chile Flats, AZ
My Experience with Roy at DJ
Hi Gant- I get it that was your experience; but I just need to voice my experience with Roy.
When I called with several key questions regarding some seemingly contradictory info posted in this forum thread, he graciously said how can I help you.
I asked him question after question, which as you know, the answer to one question (at least for me much of the time) only raises a follow-up question which I'd never thought of until I heard the answer to the preceding question.
My point here is not to either disagree with you or discredit your post at all, but rather to relate my experience with Roy.
All that said, I'd be as frustrated as you were I in the situation you described.
Better luck tomorrow. Cheers.
When I called with several key questions regarding some seemingly contradictory info posted in this forum thread, he graciously said how can I help you.
I asked him question after question, which as you know, the answer to one question (at least for me much of the time) only raises a follow-up question which I'd never thought of until I heard the answer to the preceding question.
My point here is not to either disagree with you or discredit your post at all, but rather to relate my experience with Roy.
All that said, I'd be as frustrated as you were I in the situation you described.
Better luck tomorrow. Cheers.
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Road Captain
Joined: Apr 2009
Posts: 531
Likes: 4
From: Chile Flats, AZ
NO
Short answer -- no. Were you to do that, you'd have to begin retuning the result of changing the rear cylinder VEs.
Road Warrior
Joined: Aug 2005
Posts: 1,949
Likes: 288
Bump. Anyone?
TedMan
TedMan
A less serious topic. Last spring I took 10 readings to dial in my Trip A MPG calc on the PV, and got it so it would be pretty accurate. After running a couple of tanks of gas through this spring, which I pretty much ignore MPG, I noticed on my 4th tank fill up that PV said I was only getting about 33 mpg, when my "gas station" fill up said I was getting a bit over 40, which is about average for me. Did something change in the last PV update to make it necessary to recalibrate my mpg calc again. Is this going to happen every time PV gets an update. The reason I care is I use the PV mpg calc to make sure I am not losing mpg quickly, which might point to a problem. Thanks for any feedback.
TedMan
TedMan