Power Vision Information Thread
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Extreme HDF Member
Joined: Sep 2005
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From: Baton Rouge, LA
Okay, so what comprises the "O2 integrator" value? I assume it must be comparing the Lambda value from the WB O2 sensors with the AFR in the AFR table (in my case), but what is the formula?
Thread Starter
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Extreme HDF Member
Joined: Sep 2005
Posts: 11,615
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From: Baton Rouge, LA
I was combining morning (cooler) and afternoon (hot around here) tuning runs to get better or I should say more consistent results when tuning with the stock O2 sensors. The stock sensor tuning seem to vary more as the result of outside temp. I would do one tuning run and see a cell go up by 4 then use the afternoon log and it would go back down by 3. I combined the runs to get "quicker" better averaged results and it seemed to work well. When I started WB tuning, the outside temp didn't seem to cause as much variance from one tuning run to the next.
Road Warrior
Joined: Jan 2008
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From: Upstate SC
Yeah, but if you have a New VE that's VE+20 and another right under it that's VE+2, doesn't that mean that a lean spike has caused the New VE to be richer than the VE?
Okay, then wouldn't a dot at the top of the graph be a lean spike? If New VE is VE+20 it would mean that it is adding fuel in response to a lean condition. I may be totally off-base, but if so I'm confident I'll get it eventually. Be patient.
Okay, then wouldn't a dot at the top of the graph be a lean spike? If New VE is VE+20 it would mean that it is adding fuel in response to a lean condition. I may be totally off-base, but if so I'm confident I'll get it eventually. Be patient.
Road Master
Joined: Mar 2007
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Is there a way with PV to tell the wideband/ECU to be closed loop?
Andy
question... when trying for BASIC TUNE.. and logs are tabulated and PV log Tuner used to generate VE tables for a good tune... if your driving while doing the Logs isnt consistent... will you obtain a "Straight" line when VE table is plotted ? Example... lets say I ride like a nit first few logs... rev from start to 6k often... then next log i drive like old man.. .never go higher than 3K RPM.. As i have noticed , the MAP value will of course vary according to Throttle position and how hard or soft i throttle...
If i am inconsistent the way I drive while trying to set the VE tables... will this throw of my tune ? So far its going good for me.. i adjusted the AFR tables but still get some popping when engine is warm at start till about 2400RPM depending how hard i'm on the throttle... would i decrease AFR number ( add more Fuel) to get rid of the popping at the 20% MAP column ? ...This PV is getting to be fun and interesting.
I hope I'm making sense.. I'm not at caliber of IC and JD or for sure many other,, but its begining to sink in... thanks HDFORUM.
If i am inconsistent the way I drive while trying to set the VE tables... will this throw of my tune ? So far its going good for me.. i adjusted the AFR tables but still get some popping when engine is warm at start till about 2400RPM depending how hard i'm on the throttle... would i decrease AFR number ( add more Fuel) to get rid of the popping at the 20% MAP column ? ...This PV is getting to be fun and interesting.
I hope I'm making sense.. I'm not at caliber of IC and JD or for sure many other,, but its begining to sink in... thanks HDFORUM.
Road Master
Joined: Mar 2007
Posts: 1,177
Likes: 23
question... when trying for BASIC TUNE.. and logs are tabulated and PV log Tuner used to generate VE tables for a good tune... if your driving while doing the Logs isnt consistent... will you obtain a "Straight" line when VE table is plotted ? Example... lets say I ride like a nit first few logs... rev from start to 6k often... then next log i drive like old man.. .never go higher than 3K RPM.. As i have noticed , the MAP value will of course vary according to Throttle position and how hard or soft i throttle...
If i am inconsistent the way I drive while trying to set the VE tables... will this throw of my tune ? So far its going good for me.. i adjusted the AFR tables but still get some popping when engine is warm at start till about 2400RPM depending how hard i'm on the throttle... would i decrease AFR number ( add more Fuel) to get rid of the popping at the 20% MAP column ? ...This PV is getting to be fun and interesting.
I hope I'm making sense.. I'm not at caliber of IC and JD or for sure many other,, but its begining to sink in... thanks HDFORUM.
If i am inconsistent the way I drive while trying to set the VE tables... will this throw of my tune ? So far its going good for me.. i adjusted the AFR tables but still get some popping when engine is warm at start till about 2400RPM depending how hard i'm on the throttle... would i decrease AFR number ( add more Fuel) to get rid of the popping at the 20% MAP column ? ...This PV is getting to be fun and interesting.
I hope I'm making sense.. I'm not at caliber of IC and JD or for sure many other,, but its begining to sink in... thanks HDFORUM.
That sort of thing. They all have the ability to toss out data they don't want to consider as valid in the next VE guess.
Any VE vs VE New plot that appears to be very close to a straight 45% line is most likely an open loop tune.
Andy
Thread Starter
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Extreme HDF Member
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From: Baton Rouge, LA
Those formulas were based on what I have found on the stock ECU with the stock narrow bands. I am basing what I have figured out on the wide band setup from one log and about 15 min of snooping at the data. I will be getting a wideband setup for my Sporty soon and I hopefully will have a better idea what is happening under the covers soon.
Is there a way with PV to tell the wideband/ECU to be closed loop?
Thread Starter
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Extreme HDF Member
Joined: Sep 2005
Posts: 11,615
Likes: 50
From: Baton Rouge, LA
I understand what you are saying and in a sense you could interpret that as a lean spike. The new VE is saying that it should be a higher number so it should be richer. I was looking at it more in the sense that the VE wasn't set correctly or close enough in the VE table. I was mainly using the analysis to see if the VEs were "tuned" close enough overall since you will always have some variance. Good points!
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Joe Kucinski
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You're basically doing what I'm doing, except I run the eco tune most of the time. Actually, I have yet to run my rich tune since getting the PV, as it makes no difference in performance that I can discern and is only good for some extra cooling when needed.
That was a tongue-in-cheek remark, obviously an understatement. I put the smiley in there to make sure my sarcastic intent was clear. In reality I would have to say your numbers are excellent. I haven't dynoed my bike, but it doesn't even come close to the numbers you have since it is a mere Stage 1 TC96 with 255 cams. Based on charts I've seen of like-equipped bikes I would guess it is in the neighborhood of 82HP and 100TQ.
That was a tongue-in-cheek remark, obviously an understatement. I put the smiley in there to make sure my sarcastic intent was clear. In reality I would have to say your numbers are excellent. I haven't dynoed my bike, but it doesn't even come close to the numbers you have since it is a mere Stage 1 TC96 with 255 cams. Based on charts I've seen of like-equipped bikes I would guess it is in the neighborhood of 82HP and 100TQ.
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I think DJ is working on an AT-100 kit which will include 12mm WB sensors, so the sensors alone should be available, maybe even at a reasonable price. If not, why not just add some 18mm bungs to your head pipe and use both NB and WB together? I believe Fuel Moto's head pipes have both.