Here's my 2cents. Your ET jumps up at idle, NOT because of lack of fuel, but because of the lack of airflow over the cooling fins. In other words, you went from 70mph to zero mph. Big twins do NOT like sitting at zero mph.
But if you think it's too lean at idle, I would just bump the VE's in those cells, rather than changing the AFRs. When the PV first came out, we did not have Log Tuning capabilities yet. So all of my editing was with the AFRs. But now that we have the Log Tuner, I do almost all my edits to the VE tables.
But as long as you back-up your files, you can try anything! If it doesn't run better, go back to what works!

 

A friend has a '12 Dyna Switchback and it is EITMS capable, although isn't turned on by default. It can be done with the PV, of course.

 

Adding some advance at idle would help, up to a point of course, but I would be surprised if it made much difference at times when you are barely moving or stationary. Ditto what Steevo said about airflow. Does the TTS manual give any guidelines on where to start with this? I've added some advance (1-3°) in the cruise range for cooling and mileage and my bike runs very sane ET's most of the time. I haven't added any at idle but would like to know more from those who've tried it, like a good starting point.

I used a map switch on the PCV which allowed me to toggle between a lean and rich map on the fly, but of course you can't do this with the PV. What I did that's almost as easy and just as effective is to load two maps on the PV, both with identical characteristics (VE, spark, etc.), but with the AFR/Lambda values altered. Mine is non-TBW that uses AFR's, which I've set to 13.0 across the board. For TBW you would set to .89 Lambda. This isn't a magic number and is just a stab at an AFR that would be rich enough to make some difference in cooling.

If you have TBW and have stock NB O2 sensors in line, setting Lambda values below .98 it will force it to run in open-loop mode. Thus, just use your normal tune and set all Lambda values to .89, which will force it to run ~13.0 AFR across the entire operating range. Save that tune to another filename and load both tunes (normal and rich) into the PV. When the going gets hot, pull over to the shoulder and flash the richer tune until you get moving again.

In my experience a richer AFR works to some degree, but to really get control of engine temperatures the most effective way is to install an oil cooler and/or one of the aftermarket parade fans (HD, LeNale, etc.). I have an oil cooler only and rarely see ET's hot enough to trigger EITMS (290° on this bike, although I don't have it enabled).

 

O2 sensors were first used in '06 Dynas and '07 for the touring family. I'm not sure about Softails but I believe V-Rods had none until later.

 

My understanding is that DE works for the initial decel only, that instant when you first pop the throttle back. I had a minor problem with a pop right at that point in time, but only when hot, and decreasing DE in the affected temperature range got rid of it. Now, after changing pipes and leaning the 0% TP column (20% KPA for TBW) I'm getting some sustained decel pop, which I'm going to address soon by adding fuel a bit at a time in that area.

 

So what percentage increase in ve would be a good place to start? 10% in the 0 column?

 

Increased the fuel in the 20kpa by.5 in every rpm range. Totally got rid of all popping. Thanx for the tip guys. I dont think I needed to richen it up that much, smells really gassy at idle. I figure a little rich at idle will be great, especially when I get caught at long lights on a 105 degree day. But might be a little too rich. Might lean it back to .3 richer than where I started. Just a little fine tuning is all it needs.

 

Steevo, thanks for the explanation.

If I understand what you are saying, you suggest changing the VE’s to increase fuel. But if you are in Closed Loop wouldn’t the narrow band O2 sensors indicate it is too rich and lean it out?

Also, how much of a change to the VE’s affects fuel delivery? As an example, if I wanted to increase fuel delivery to mimic a Lambda value of 0.981 to 0.890 (AFR of 14.4 to 14.3) how much would I bump up the VE in each cell?

Thanks for your input and patience……

 

I am working to get the VE optimized. I then adjust the AFR to get the appropriate air/fuel ration for each cell. I have even go so far as to develop multiple maps with four different targeted AFR maps using the same VE tables. For instance, I rode interstate highways for three hundred miles in fifty degree temperatures on Saturday. I used the stock AFR (level 14.4) to get better fuel mileage. I did not need acceleration or engine cooling. My 13.8 really pulls off of the bottom. Great for the mountain roads. I have two other AFR maps...14.4 and 14.1 that are rounded down to 13.3....not flat like stock.

 

Changing VE values at idle shouldn't affect decel pop, so I would put those values back where they were. As for 20 KPA above idle, I would richen it only enough to get rid of the pop.

In fact, as per Linville Lions' procedure, instead of altering VE's I would have changed the Lambda table to richen the AFR's. The idea is to get the Lambda table and VE's in sync--i.e., a match with real-time AFR's--then make changes to Lambda values to get your AFR's where you want them.