WBO2-Tuning Spreadsheet

[dave w]

Yes, "Idle VE vs. MAP vs. RPM" and "Open Throttle VE vs. MAP vs. RPM" are the correct tables.

dave w

BPW Parameters.JPG

[grumbolt]

Yes, "Idle VE vs. MAP vs. RPM" and "Open Throttle VE vs. MAP vs. RPM" are the correct tables.

dave w

BPW Parameters.JPG

awesome, thanks.

i used that and then copied the prescribed values back to those tables after logging.

then i relogged and did it again with the fine tune numbers..

it seems to be much better now!

all the stuff i am using in tunerproRT including the log files and spreadsheets are located at http://robertweaver.net/tuning/

i think i have things kinda sorted out, i still have to do some logging and tuning while driving it around, but that will require someone to hold the laptop being that the buggy isnt super smooth and the terrain is anything but laptop friendly lol

i did see one thing that bothered me, while it was idling on log 2, everything seemed normal then everything dipped, the engine recovered and seemed ok, but i dont know what made it all dip almost to the point of stalling.

if you wouldnt mind taking a look and seeing if it looks like i am on the right track it would be greatly appreciated.

thanks again,
grum

the reason for the link above is the website would not allow me to upload the logs, xls, or csv files.

[dave w]

I'm thinking the .xdl is an allowed file type. Often files types that are not allowed can be compressed to a .zip file and attached.

dave w

[grumbolt]

here are the logs from the first 2 tries at tuning..

thanks again for your help and insight.

[dave w]

here are the logs from the first 2 tries at tuning..

thanks again for your help and insight.

Files??

[grumbolt]

lol i must have gotten the cart ahead of the horse lol... here they are now...

i had originally saved them as .rar files, i changed them to .zip and they upload now...

thanks again.

[dave w]

I can't speak directly to the logs you posted. I honestly do not have the free time to "crunch" posted data logs.

Tuning VE Tables often requires Smoothing the Peaks and Valleys in the VE Table that occur from the using the WBO2 spreadsheet. Smoothing is 3D thinking. An engine under heavy load and high RPM's require more fuel than an engine under light load and low RPM's. Kpa is engine load, an engine at 100 Kpa is at or close to WOT. The Kpa will be near 100 Kpa when the engine is being started. Engines need more fuel accelerating to 70 MPH than maintaining a cruising speed of 70 MPH. The computer interpolates VE values of the surrounding cells, so if the idle is 43 Kpa @ 700 RPM's the computer interpolates VE table values of cells 600 RPM's / 40 Kpa and 800 RPM's 40 Kpa. If the idle was 48 Kpa @ 700 RPM's the computer will interpolate cells 600 RPM's / 50 Kap and 800 RPM's 50 Kpa. As expected the VE value for 600 RPM's / 50 Kpa is lower than the VE value for 800 RPM's / 50 Kpa.

The attached has sample screen shots using the TunerPro "Smoothing" tool. I often use .55 for smoothing daily drivers. Tuning is experimenting, so smoothing with values between .35 ~ .75 are typical. Extreme peaks or valleys indicate something is VERY WRONG!. Minor peaks and / or minor valleys are common.

In a perfect world a data log would have information for every cell in the VE Table, but that would be nearly impossible to accomplish. It seems unlikely a daily driver will need tuning in the extreme corners of the VE table.

dave w