Let us know the outcome...

 

Tuning with the PV Log Tuner software or the new Beta At will yield the same end results. The new Beta update allows you to do everything on the PV display rather than in the software, and gives you more enhanced monitor options as well.

 

It all really depends on the design of the exhaust system, also remember VE is not actual measured air flow it is predicted/modeled airflow and is simply a reference value.

 

Im really trying to understand the relationship between VE's and actual air flow and how it relates to power and torque of an engine. I thought the higher the VE's the more air and fuel an engine is taking in, therfore it would be making more power? I"m just trying to better understand what is happening.
Thanks...

 

Yesterday I did my first 2 logging runs using the latest beta firmware and Autotune. First impression, what a cool way to tune for those like me who haven't quite grasped the intricacies of doing logging runs and adjusting via log tuner. Second impression, I have thus far been very cautious with how I've run the bike, and doing the AT runs gave me an excuse to go much higher in the RPM / load range than I've previously done - and gave me my first real impression of the potential my 103" motor has.

Observation/question for those experienced with the tuning process. I started out with a F-M map for my bike's config, and the results from my AT tuning runs showed some localized, fairly dramatic spikes in my VE tables vs. the F-M tune. The 2nd run was similar to my 1st in this regard, with pronounced peaks in the VE values at various RPMs/MAPs. The F-M tune had two distinct rounded peaks in the VE tables - mainly in the 3-4K RPM range, at 30-50 MAP and 95-100 MAP. My AT tuning results show more pronounced spikes, and in several different locations. I'm wondering if this is just due to lack of enough "hits" in all cells because my runs didn't stay at certain RPM/MAP levels long enough, or? One surprise was that my rear cyl VE #s went up quite a bit across many RPM/MAP cells. Thoughts? I'm guessing I need to do more AT tuning runs to see further changes and reconcile in my head.

 

One thing that I do is after I get a few runs in and corresponding tune adjustments, if I still see spikes I'll "smooth" in that general area; ensuring it's something I can get hits on during subsequent runs. If it returns to the prior state, that is what the engine wants. Most likely, you'll see less dramatic spikes. I do make several runs after smoothing to ensure I benefit from the real time feedback and my tune is adjusted accordingly.

 

Excellent advice - and thanks. I'll try this route once I get some time to do more tuning runs. Most appreciated.

 

I sent you the calibration files, original tune and the log files. I also forgot to mention I tuned the bike using th HD narrow band sensors.


Thanks,
Mark

 

Will do.

 

Auto tuned one of my maps today..pretty cool stuff!