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Oct 3, 2012 | 04:50 PM

#3251

fuelmoto

Platinum Sponsor

Joined: Feb 2007

Posts: 7,287

Likes: 4,286

From: Little Chute, WI

Quote:

Originally Posted by tdkkart

Question, if the fuel used/mileage etc needs a calibration factor entered on the trip page in order to be accurate, how can the VE #s be correct??

If the system can't figure out how much fuel is being used, it can't possibly be able to accurately calibrate VE's can it??

Appears that mine was off approx. 9% based on what it says I'm using vs what I am seeing on fill-ups, are my VE's that I've gotten from Autotune runs wrong also??

The trip center in no way affects VE calibration or the tune itself. Trip center is simply a displayed value that is based off info stored in the speedo cluster, PV lets you adjust it so it displays correctly

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Last edited by fuelmoto; Oct 3, 2012 at 04:52 PM.

Oct 3, 2012 | 04:52 PM

#3252

skarcher

Novice

Joined: Sep 2009

Posts: 23

Likes: 0

From: Langham SK Canada

Quote:

Originally Posted by tdkkart

In my experience, there has been no correlation between trip center settings and the tune process. Coming from Canada, I have to do a correction either to the gallons used or MPG to make it accurate for imperial gallons. I've tuned using log tuner and autotune with and without corrections applied to the trip center with very similar final results to my tune. My results ended up +/- 3% which is about what I end up with any tuning run from one day to the next.

Oct 3, 2012 | 05:25 PM

#3253

tdkkart

Cruiser

Joined: Aug 2011

Posts: 229

Likes: 11

From: East Iowa

Quote:

Originally Posted by fuelmoto

So where do the "fuel used" and mpg values come from??
I have to assume that the amount of fuel used is based on injector duty cycle, which I assume is also included in the VE calculations, not??
So if one is off they'd all be off by an equal amount.

It appears, based off of GPS readings that my speedo is dead on, or VERY close, depending on how much you believe GPS readings.

Oct 3, 2012 | 07:36 PM

#3254

stro1965

Seasoned HDF Member

Joined: Feb 2007

Posts: 10,602

Likes: 721

From: Bellevue, NE

OK, I did my first auto tune data log session and, as I compare the original tune to the new one, the VE tables are the only thing that changed at all. No changes whatsoever in the timing. Is this normal? Also, I had assumed that it would modify the original tune but it made me save the modified tune to a different slot, so I assume I need to load THAT tune to the bike, and then do further auto tuning from that map? Sorry for the rookie questions...trying to learn.

Oct 4, 2012 | 06:45 AM

#3255

lhgdale

Stellar HDF Member

Joined: Mar 2009

Posts: 2,454

Likes: 58

From: Graysville, AL

Yes, load the latest auto tuned map on the bike then autotune with it. I only see changes in VE's also but I am using the basic setup.

Oct 4, 2012 | 07:20 AM

#3256

stro1965

Seasoned HDF Member

Joined: Feb 2007

Posts: 10,602

Likes: 721

From: Bellevue, NE

Quote:

Originally Posted by lhgdale

Yes, load the latest auto tuned map on the bike then autotune with it. I only see changes in VE's also but I am using the basic setup.

Basic for me too. Not sure if I can expect to see timing changes or not?

Oct 4, 2012 | 07:35 AM

#3257

Sam2010

Outstanding HDF Member

Joined: Aug 2009

Posts: 2,858

Likes: 217

From: Puyallup Wa.

Use auto general logging and run it through PV log tuner to adjust your timing after you are done with the VEs. Auto tune retards timing 4* during tune runs. And I still like to compare tunes in WinPV to me it makes sense to keep a check on if anything is going astray.