Power Vision Information Thread
#2871
08-09-2012, 05:49 PM
Intermediate
Join Date: Jul 2012
Location: Chico, Ca
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[quote=iclick;10182202]I'm at 14.0 there and am having no problems either.
You might try extending your 14.2 rows on to 80KPA. It doesn't take much throttle to hit that level and you're quite rich there, which may affect your mileage if you are running there often enough.
Ya, I might give that a try. As far as fuel mileage I average about 44-46
and she runs like a striped ape. Those woods Triple 5 cams really woke her up.
You might try extending your 14.2 rows on to 80KPA. It doesn't take much throttle to hit that level and you're quite rich there, which may affect your mileage if you are running there often enough.
Ya, I might give that a try. As far as fuel mileage I average about 44-46
and she runs like a striped ape. Those woods Triple 5 cams really woke her up.
#2872
08-10-2012, 06:01 AM
Yes, that should be rich enough, but you might look more closely at your VE tables. You may be running into the same problem I had. For some reason I was getting progressively leaner in one area (~3k RPM IIRC @ 0% TP) for each tuning session. The changes were so small I didn't notice and after a few dozen datalog runs the VE values had decreased by around 20%. That was enough to cause decel popping.
I would suggest that you compare your VE values at 20KPA (or 0% TP) with those in the tune you started with before tuning with the PV. If you see what I experienced just use the stock values, and if you're getting no popping just leave them there, then eliminate those areas from future tuning. I've had no popping problems since doing that.
Looking for a reason for this, I asked Jamie who said muffler characteristics can cause this sort of anomaly--most of it from reversion or exhaust leaks, as Dennis has already mentioned. The 0% TP column is problematic with so many exhaust systems that DJ recommends not auto-tuning there with the PCV with Auto-Tune (closed-loop with WB O2 sensors).
I would suggest that you compare your VE values at 20KPA (or 0% TP) with those in the tune you started with before tuning with the PV. If you see what I experienced just use the stock values, and if you're getting no popping just leave them there, then eliminate those areas from future tuning. I've had no popping problems since doing that.
Looking for a reason for this, I asked Jamie who said muffler characteristics can cause this sort of anomaly--most of it from reversion or exhaust leaks, as Dennis has already mentioned. The 0% TP column is problematic with so many exhaust systems that DJ recommends not auto-tuning there with the PCV with Auto-Tune (closed-loop with WB O2 sensors).
#2873
08-10-2012, 06:04 AM
Thanks. My AFRs in the FM map Jamie sent with my PV are 13.0 and 12.5 already so I think that should be rich enough. Think I am going to start over with the FM map and use the Autotune to do some runs and see what changes.
#2874
08-10-2012, 06:11 AM
My calibration for my 2011 Wide Glide also has a 27 and 85 kpa column. Maybe its specific to the calibration for certain models. I think mine is a 176 calibration if I remember correctly (at work so don't have access right now)
#2876
08-10-2012, 11:04 AM
I assume you're running 12.5-13.0 at WOT, not below that, which is in open-loop and not an area that can be tuned with the stock NB sensors.
#2877
08-10-2012, 11:13 AM
No, you aren't alone. I just checked some tunes I have here to add to the list:
2006 FLH-Strat 141 (Jbrushoe): No
2007 FLH-Strat 159: Yes (27 and 85 KPA present)
2007 FLH-Strat 176 (mine): Yes
2008 FLH-Strat 205: No
2008 FLH-Strat 205: No
2010 FLH-Strat not shown: No
2010 WG-Strat 176 (MMXIWG): Yes
The common variables here are that all non-TBW with O2 sensors have the extra columns.
2006 FLH-Strat 141 (Jbrushoe): No
2007 FLH-Strat 159: Yes (27 and 85 KPA present)
2007 FLH-Strat 176 (mine): Yes
2008 FLH-Strat 205: No
2008 FLH-Strat 205: No
2010 FLH-Strat not shown: No
2010 WG-Strat 176 (MMXIWG): Yes
The common variables here are that all non-TBW with O2 sensors have the extra columns.
Last edited by iclick; 08-10-2012 at 11:27 AM.
