I never suggested any of the %s I shared were facts. Far from it. I said they were my opinion and my opinion only. I stated clearly that it was my opinion based on my tuning experiences with multiple bikes, using multiple tuning software compared with 6 dyno tunes from 5 different competent and talented dyno tune shops.

All of these shops significantly improved the performance of the bike after their dyno-tuning. Over the course of that decade I probably spent between $2-3000 on these dyno-tunes and I don't have a single complaint.

But technology advances and EFI engines are well-suited for computer tuning since the entire engine is run by a computer. After my dyno-tune last year, my bike ran very well and put out 129hp/129ftlbs (123/123 SAE).

After that dyno-tuning I added a PV for the benefits of viewing real-time data gauges such as engine temp while I was riding. I started using the auto-tune feature after it was released last Fall and applied it to the last dyno-tune map. The performance was even better and where I had a few very small stumbles in the bike's performance those were eliminated entirely. The entire map ran stronger and smoother. Those are the only "facts" I can share and either they're helpful to you or not. Either way, for those considering a new "tuner", the PV should definitely be on your research list.

 

First, the SEPST, Mastertune, and PV Autotune basic all use O2 sensor data in pretty much the same way. They all three depend on the ECU's closed loop circuitry. And they all three have the same identical limitations/abilities when it comes to tuning cells. You say PV auto tunes at 100kpa with rev limit rpm? Really?

It's not only my opinion. But the precision tune available in a modern up to date dyno lab cannot be duplicated with narrowband (stock) O2 sensors DIY. Even the addition of PV's wide band sensors cannot even the score with a well equipped dyno engine lab.

I think the PV array of tuning tools are fine. Going with their Pro AT option will cost about $800 for everything. If you like to tune and tune it's the ticket.

 

You need to do some research. PV's autotune approach changed the tuning game from the approach used my MasterTune or Smarttune. Smarttune and Mastertune are essentially identical and tune the engine's map only in the closed loop range (20-60kPa and 1000-3500 rpms).

The PV offers "Basic" autotune at no charge and works with the stock O2 sensors across the ENTIRE map (20-100kPa and 1000-7000rpms). DJ also offers "Pro" autotuning which requires the purchase of WB sensors as you referenced. This is a "Fact" since I've compared maps before and after Basic Autotuning and almost all cells that were touched during the datalogging ride were modified including cells up to 100kPa and to my engine's rev limit of 6200rpms.

Obviously with the WB sensors (Pro) you'll get real-time autotuning however with Basic they take a unique approach that's far different from SEPST or TTS. The PV's Basic Autotuning takes 4 degrees of spark advance out of the entire map being tuned. The PV moves the entire map into the lowest AFR setting that will function in closed loop. The software then captures the rider's realtime data. With this data, the PV's Basic Autotune modifies the VE tables using the data collected from the stock NB O2 sensors across the entire map.

Basic Autotune then calculates the necessary VEs, inserts the new VEs back into the map with the original AFRs and adds back the 4 degrees of spark advance. You now have your original map but with the new optimized VEs. The user doesn't need to know that any of these steps are being taken since its all invisible to the user. I'm sure there's many other steps taken by the PV's algorithyms that I have no visibility to, however the process is far different from any other Autotuner using the stock NB O2 sensors.

Neither the SEPST's Smarttune or TTS's Mastertune can tune this way. Once again, for those that are interested they should do some reading before suggesting they know how PV Autotune functions. http://www.powercommander.com/downlo...utotune.01.pdf

 

Here is an example of having before and after #'s on the graph. Obviously I had a nice improvement over the stock #'s......

 

How do i view your dyno runs it wont let me said im not authorized and i cant seems to find a questions that address what i am trying to do i am new at this.

thanks
prondas

 

You installed preformance pipes on your bike, changing the back preasure on the engine. Then You installed a preformance air cleaner changing the bikes
feul and air mixture.
Then, Is a dyno tune nessasary you ask?
Ask yourself if you like your bikes piston rings in good condition?
Let us know.

 

...it's because you only have 5 posts..you need to post some more until that frees up...I think it's 10 posts..not sure though...hang in there....

 

There's a lot that goes into dyno tuning that you should hear and see from a qualified technician who does this every day. I don't mean any disrespect to anyone from this forum. But I don't think your question is answerable here. There's just too much to cover. If you got the time or interest, go and visit a shop that does bike tuning using a dyno and talk to them.
You can find locations that use dyno equipment made by Dynojet Research here.

http://http://www.dynojet.com/dyno_c...otorcycle.aspx

They're well known in the business and have well trained operators.

good luck