Power Vision Information Thread
Outstanding HDF Member
Joined: Jun 2014
Posts: 3,185
Likes: 189
From: 90210
Feel free to send your latest calibration to jamie@fuelmotousa.com and i will take a look, should not take much to get it squared away. Be sure to include a full explanation of all of your modifications and exactly what it is doing. Note the 17.9 AF you are seeing is the reported value during decel fuel cutoff when the injectors are shut off
Last edited by LA_Dog; Mar 10, 2016 at 01:23 AM.
Outstanding HDF Member
Joined: Jun 2014
Posts: 3,185
Likes: 189
From: 90210
Andy- Not yet, the only logs I have right now are short AT-TT runs checking decel behavior. probably not overly helpful. I know the injectors are staying on to some degree because my shift pop is completely gone after getting back the adjusted code tune file from Roy. But, from what I (sort of) understand the 'decel cut' operation (which is hidden from us in the code) can be turned off or left on for certain rpm ranges. I should have time this next week to do some regular riding and gen some decent logs. Overall the tune is running very well, the several M-80's are mostly unsettling to little ol ladies standing on the corner. don;t want to give anyone a premature heart attack ya know? lol
I found one very interesting bit of info provided by T-max on tuning the decel region- (attached)
it mainly discusses how to tune decel VE when the 'decel cut' feature is disabled and injectors are left enabled for decel. Now I know they use a replacement ecm but thinking- is this principal going to be the same for me as well if I have injectors enabled for decel? I've never run a wide band AT session on 30kpa or below. I see how it could make sense for injectors enabled on decel. anyway just another obsure area of tuning for discussion.
I found one very interesting bit of info provided by T-max on tuning the decel region- (attached)
it mainly discusses how to tune decel VE when the 'decel cut' feature is disabled and injectors are left enabled for decel. Now I know they use a replacement ecm but thinking- is this principal going to be the same for me as well if I have injectors enabled for decel? I've never run a wide band AT session on 30kpa or below. I see how it could make sense for injectors enabled on decel. anyway just another obsure area of tuning for discussion.
Extreme HDF Member
Joined: Nov 2007
Posts: 14,670
Likes: 139
From: East of the Sun, West of the Moon
you must change the calibration ID in PV, TTS, etc. to the same as the SE calibration currently in bike for it not to throw up a red flag.
Road Master
Joined: Mar 2007
Posts: 1,177
Likes: 23
Dog What are you tuning the bike with and what are you looking at the data with?
When I was tuning the Sporty, I ended up with REALLY BIG VE numbers in the 2500 to 5500 range and 0 throttle. Keep in mind that I am an ex racer and pulling big downshifts is just in normal riding. My bike is really quiet in a downshift. AFR is right at 14 if I recall.
Andy
When I was tuning the Sporty, I ended up with REALLY BIG VE numbers in the 2500 to 5500 range and 0 throttle. Keep in mind that I am an ex racer and pulling big downshifts is just in normal riding. My bike is really quiet in a downshift. AFR is right at 14 if I recall.
Andy
Last edited by whittlebeast; Mar 10, 2016 at 08:57 AM.
Outstanding HDF Member
Joined: Jun 2014
Posts: 3,185
Likes: 189
From: 90210
Dog What are you tuning the bike with and what are you looking at the data with?
When I was tuning the Sporty, I ended up with REALLY BIG VE numbers in the 3000 range and 0 throttle. Keep in mind that I am an ex racer and pulling big downshifts is just in normal riding. My bike is really quiet in a downshift. AFR is right at 14 if I recall.
Andy
When I was tuning the Sporty, I ended up with REALLY BIG VE numbers in the 3000 range and 0 throttle. Keep in mind that I am an ex racer and pulling big downshifts is just in normal riding. My bike is really quiet in a downshift. AFR is right at 14 if I recall.
Andy
what's interesting is I have adjusted decel VE richer by a fair margin as well as lambda table in that trouble decel area and it does not make a lick of difference in the logged WBO2 data- the AFRs in that trouble area are always showing highly lean. hence my suspicion that injectors are shutting of at that rpm range for some reason but staying active in other rpm areas.
I do like the concept of leaving injectors enabled on for decel though- it got rid of my shift pop right away. to me it would seem bad to shut off injectors at decel for a motorcycle. last I heard from DJ their engineers were working on a way to give us a setting in the tune file to keep them on or leave the default of shut off.
BTW my VE numbers in the trouble area (3000-2500, 0TP) are presently about 118/119. lambda in that area, 20kpa is 0.823, timing in that area is 42- but i also tried 45 and down to 33. no difference.
Last edited by LA_Dog; Mar 10, 2016 at 09:14 AM.
Outstanding HDF Member
Joined: Jun 2014
Posts: 3,185
Likes: 189
From: 90210
I'm not concerned with pops and crackling on decel- always going to have some and it's fine. but the three or four loud cherry bombs are unique and only presented after using the TT add on. before the TT and just running with normal NB sensors and PV tune, i had no cherry bombs of that type- just the typical pops and crackles of short open pipes.
HD Forum Stories
The Best of Harley-Davidson for Lifelong Riders
7 Times Harley-Davidson Chucked Tradition Out the Window
Verdad Gallardo
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
Road Master
Joined: Mar 2007
Posts: 1,177
Likes: 23
It appears to be a little lean in the mid range, compared to how I set up most tunes. I go about 14.2 or so up to about 60 KPA, fading up to about 13 above about 85 KPA. These AFR numbers are a little +/- as the calibration of a Wide Band can be a little off. Your sweet spot may be a little different.
Did you get this from FuelMotoUSA?
Did you get this from FuelMotoUSA?
Last edited by whittlebeast; Mar 10, 2016 at 09:50 AM.
Road Master
Joined: Feb 2014
Posts: 804
Likes: 237
From: TN
Dog, thanks for info on the fuel cut off. I don't have a pop, but have the "jake brake" effect when backing off the throttle for corners when riding the twisties. It doesn't seem to matter what the rpm were, it seemed more throttle position related. What I did was in the throttle blade control (alt) I lowered the 5% column 1750-2500 from 5 to 4 which helped. i was looking at the copy of the factory tune this morning, that setting was at 3, so I'll try that out to see of it helps any more. My thoughts are that if the throttle blade moves less in lower throttle conditions it the might smooth out the transitions. It may also help with the pop, just a thought. When the bike was stock, I don't remember having that drop off/cut off being this abrupt.