VAgcom logging - Engine load etc
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AudiWorld Senior Member
Joined: Jan 2010
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From: Brighton, MI
VAgcom logging - Engine load etc
I logged a few 3rd gear runs to determine what parameters can be logged and what they 'tell'.
For example:
"Engine Load": Group 2 - Field 1 -Engine - Load - ms. Climb to 10.5 ms at 4000 rpm, then fall to around 8 at 6.5k.
"Timing Retard": Group 20 - Field 0
Cylinder 1 - Timing Retard. Shows zeros for lower rpm, then 2.2 up to 3.7 for higher RPM.
For example:
"Engine Load": Group 2 - Field 1 -Engine - Load - ms. Climb to 10.5 ms at 4000 rpm, then fall to around 8 at 6.5k.
"Timing Retard": Group 20 - Field 0
Cylinder 1 - Timing Retard. Shows zeros for lower rpm, then 2.2 up to 3.7 for higher RPM.
Thread Starter
AudiWorld Senior Member
Joined: Jan 2010
Posts: 1,668
Likes: 16
From: Brighton, MI
Turbo is a K03/K04 hybrid, chip is 'T.A.P. Stage 2'. Stock injectors.
And since 'timing' is (?) an important parameter, what module/channel would be the one to log?
Intake air temp: I made several 3rd gear pulls to 6.5k, and several 4th mid rpm WOT pulls. IAT once reached 40 deg C, but mostly maxed out at 35 deg C.
Waste gate N75 duty cycle: starts at 99% up to 3k, then falls quickly to 78% before 4k and tapers to 60%. Does it mean (lower numbers)that N75 is bleeding off/reducing boost? Because running too lean? To prevent misfires? To keep boost under a certain given value?
Specified Torque is always 410 Nm. Does not seem to valuable info.
Actual Torque: peaks at 4k rpm with value around 215 Nm, falling to 170 at 6.5k rpm. Since it seems a calculated value: how does the value compare to 'reality'?
And since 'timing' is (?) an important parameter, what module/channel would be the one to log?
Intake air temp: I made several 3rd gear pulls to 6.5k, and several 4th mid rpm WOT pulls. IAT once reached 40 deg C, but mostly maxed out at 35 deg C.
Waste gate N75 duty cycle: starts at 99% up to 3k, then falls quickly to 78% before 4k and tapers to 60%. Does it mean (lower numbers)that N75 is bleeding off/reducing boost? Because running too lean? To prevent misfires? To keep boost under a certain given value?
Specified Torque is always 410 Nm. Does not seem to valuable info.
Actual Torque: peaks at 4k rpm with value around 215 Nm, falling to 170 at 6.5k rpm. Since it seems a calculated value: how does the value compare to 'reality'?
Thread Starter
AudiWorld Senior Member
Joined: Jan 2010
Posts: 1,668
Likes: 16
From: Brighton, MI
2 logs
For test purposes, I logged 2 sets of data.
Which parameters can be dropped, which should I add?
Is 031-1 Lambda current value of interest? Other 031?
HP is calculated from torque. Airmass/per HP ditto.
Which parameters can be dropped, which should I add?
Is 031-1 Lambda current value of interest? Other 031?
HP is calculated from torque. Airmass/per HP ditto.
AudiWorld Super User
Joined: Aug 2001
Posts: 2,264
Likes: 404
From: Vancouver, BC, Canada
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