Power Vision Information Thread
Advanced
Joined: Mar 2020
Posts: 71
Likes: 10
From: Kansas
Advanced
Joined: Mar 2020
Posts: 71
Likes: 10
From: Kansas
TT question
Is it normal for Target Tune to hunt around so much at idle for AFR. I idle at 30-34 KPA. During heat Cycles I noticed the front Cylinder WB02 is 13-17AFR while back stays near targeted 13.8-14.3. TwinCam D&D boarzilla exhaust. Star Racing 650 cams
Last edited by Richard Bruce; Jun 5, 2022 at 05:33 PM.
Advanced
Joined: Mar 2020
Posts: 71
Likes: 10
From: Kansas
Also, does Target Tune on a base map with Target Tune enabled supply fuel based on the VE table, or does it supply fuel based off the fuel map for cylinders? Would my base map be so far out that the VE's would make it hunt around that much while idling because of the massive amounts of upgrades I've done. DJ supplied a map that in the description was basically my setup or Dyna I have a softail FLSTFBS but boarzilla 650 cams. I doubt they had the heads done up like I did but would that cause this behavior OR do I have something else going on? Would a intake leak, exhaust leak cause this behavior? Just doesn't seem normal. I'm taking it to a dyno tuner but I want it to be good to go for him.
Last edited by Richard Bruce; Jun 5, 2022 at 05:48 PM.
Cruiser
Joined: May 2012
Posts: 146
Likes: 13
From: Kingston, NH
Also, does Target Tune on a base map with Target Tune enabled supply fuel based on the VE table, or does it supply fuel based off the fuel map for cylinders? Would my base map be so far out that the VE's would make it hunt around that much while idling because of the massive amounts of upgrades I've done. DJ supplied a map that in the description was basically my setup or Dyna I have a softail FLSTFBS but boarzilla 650 cams. I doubt they had the heads done up like I did but would that cause this behavior OR do I have something else going on? Would a intake leak, exhaust leak cause this behavior? Just doesn't seem normal. I'm taking it to a dyno tuner but I want it to be good to go for him.
Advanced
Joined: Mar 2020
Posts: 71
Likes: 10
From: Kansas
This is my log from a heat cycle.. does the WB Front look normal and could be attributed with the tune rather then something else? I appreciate your time. I initially thought it was an intake leak but I've done the intake seals 3 times and now not so sure..
Advanced
Joined: Mar 2020
Posts: 71
Likes: 10
From: Kansas
it really doesn't matter. Joe Lyons is the man and can get her going. Thanks for the information
Advanced
Joined: Mar 2020
Posts: 71
Likes: 10
From: Kansas
15-17.8 AFR at decel while cruising
I got my bike back and put about 300 miles on it. I currently have TT/WB hooked up to it. I noticed Hella decel popping and while doing cruising anytime I let off the throttle it jumps to 17 AFR. This is anywhere from 10-25KPA and 1000-4500 RPM. The TPS is at 2-3% enclosed is my log. This is professionally dyno tuned. Any suggestions? Can this hurt my motor? Should I add fuel, spark, or both? Thanks.
Last edited by Richard Bruce; Jul 4, 2022 at 09:04 PM.
Road Captain
Joined: Aug 2006
Posts: 707
Likes: 38
Originally Posted by Richard Bruce
I got my bike back and put about 300 miles on it. I currently have TT/WB hooked up to it. I noticed Hella decel popping and while doing cruising anytime I let off the throttle it jumps to 17 AFR. This is anywhere from 10-25KPA and 1000-4500 RPM. The TPS is at 2-3% enclosed is my log. This is professionally dyno tuned. Any suggestions? Can this hurt my motor? Should I add fuel, spark, or both? Thanks.
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1st Gear
Joined: Dec 2021
Posts: 5
Likes: 0
From: New England
Something I would like to understand better:
If I run a factory-like closed loop map with adaptive control enabled (which learns and applies correction factors over the set VE table), why is it that we still need to tune our VE tables when we modify the bike? (lets just say Stage 1 mods)
Is it simply because there are areas of the map that are open loop and will never learn through adaptive control? Or is it that adaptive control is in some way inadequate?
If I run a factory-like closed loop map with adaptive control enabled (which learns and applies correction factors over the set VE table), why is it that we still need to tune our VE tables when we modify the bike? (lets just say Stage 1 mods)
Is it simply because there are areas of the map that are open loop and will never learn through adaptive control? Or is it that adaptive control is in some way inadequate?
Cruiser
Joined: May 2012
Posts: 146
Likes: 13
From: Kingston, NH
I got my bike back and put about 300 miles on it. I currently have TT/WB hooked up to it. I noticed Hella decel popping and while doing cruising anytime I let off the throttle it jumps to 17 AFR. This is anywhere from 10-25KPA and 1000-4500 RPM. The TPS is at 2-3% enclosed is my log. This is professionally dyno tuned. Any suggestions? Can this hurt my motor? Should I add fuel, spark, or both? Thanks.