Originally Posted by Darke_peak

I'm new to PV and to tuning. I have messed around with autotune and can see that it appears to only be altering the VE tables. The AFR table stays the same.

So the way I see it, autotune just a fine tuning tool. If your base tune (AFR table, spark advance table) is not correct for your specification (cams, exhaust, intake) then you are just auto tuning a bad tune which isn't going to replace a good base tune to start with. Correct?

I haven't read all 440 pages, but it seems some people are suggesting that you can start with any tune and if you run autotune enough times it will fix it and you will end up with a good result.

Originally Posted by goats

without an accurate ve table it doesnt matter what afr you want to run, you simply wont get it.

Air Fuel Ratio

if your ecm thinks there is a certain amount of air it will add a specific amount of fuel to achieve the desired afr.

if there is less or more air than what the ecm is expecting the added fuel will not equal the desired afr.

for stock bikes or slightly modified (pipes, intake) the base map may be off but that just means doing more runs to get the ve table accurately mapped.

spark is a bit more involved and better left for someone else to explain. personally i only changed my spark tables a little cause of the amount of knock i was getting.... i may be getting close but i am not ready to fine tune my spark tables yet

Originally Posted by stailjim61

I'm now glad you posted this. When you do an AT and let the unit make the changes you won't see anything in the 750 row. I experimented with a 176 cal this morning.

AT letting PV make changes = no VE correction to 750 row.

Datalog tune using PV Log Tuner = change to 750 row / 0 column.

Originally Posted by stailjim61

Try running a datalog at the same time your using AT. Then load the log into Log Tuner and go through the manual process of updating a new cal. You don't have to save it as a new cal but it will show you hit count. Even better if you had any knock retard you can see that also.

Here's a suggestion, right, wrong, good or bad. Go out for a 45 minute NORMAL ride. Then look at the datalog and see what is YOUR normal riding area. Take blue painters tape and make a box of that area then go out and max the crap out of that area. Do it 3 times and compare. After the 3rd run you should be around 3% or less. This won't be your final tune, but it's a way to see how your data in that area is affecting your tune. If you get, lets say 70+ hits on each run, and your tune is swinging, then you have something going on with the bike. If, after 3 runs of hitting 70+ in that bax and your tune stays within a couple % then you can rule out thebike. Operator error is the problem, or you're not reading the results correctly.

Another point to the above is this. When someone makes the first AT run it's not a bad idea to do a pretty mellow run. This helps in getting your VE's going in the right direction. Start out with a datalog run and use Log Tuner to build the new cal. PV Log Tuner will show you if you have any outrageous knock retard going with the starter cal. It's an extra step, but it gives someone a decent idea of how far off the starter cal really is. Ex: You see timing being oulled out in bucketloads, then one would be wise to make a correction before tuning.

As far as increasing how much correction you expect: I'm not a big fan of that approach, unless you're maxing out hits. It's like the geek saying of garbage in equals garbage out. I wouldn't trust letting the PV make a huge correction on limited hits. Yes, it will correct, but how valid is the big correction based on limited data. I'd rather make extra AT runs.

Originally Posted by VDeuce

Anybody know of a way to reset or change the session IDs for the auto tune?

Originally Posted by goats

the only way i know is to save them and rename them.
i wish there was a way to do this on the pv itself