View Full Version : How do I convert Lambda to AFR?
TJWells
February 6th, 2013, 04:28 PM
I'm trying to set up to log for the first time. I'm following E38 vve how to. It tells me to set B0141,B0143,B3618 to AFR numbers. But EFIlive is set to lambda. I've read that working with lambda is better so I guess I'd rather learn how to change AFR to LambdA #'S. I am using an LC-1 connected with a serial cable if it matters. v2 will show me both so I guess I got that part Right.Any help would be appreciated.
swingtan
February 6th, 2013, 10:32 PM
It will depend on the fuel being used.
AFR=Lambda X Stoichiometric Ratio
So assuming ULP ( Stoich = 14.68 ) and say you have a Lambda of 0.86, then the AFR would be 12.62:1
Transposing, Lambda=AFR / Stoich
Using the above example, 12.62 AFR / 14.68 = 0.86 Lambda
You can change the units in EFILive under Edit -> Properties.
Simon.
TJWells
February 7th, 2013, 02:57 AM
Thank you!
I hit every button I could find to edit units and could'nt find it.
joecar
February 7th, 2013, 08:01 AM
Edit->Configure Display Units.
TJWells
February 11th, 2013, 11:29 AM
Ok I tried to flash my ecm with the updated tune to log data per vve how to. I connected and tried to verify ecm status and I have a message saying that I need to launch v8 and update to newest version. My boot block is 2.07.04 and firmware is 2.07.35 which from what I can tell is the newest
version. If I open v8 and check It says I have the newest version. Here is a copy of my tune.
14549
plus what pids should i select with an lc1 in serial mode.
TJWells
February 11th, 2013, 01:15 PM
ok maybe its because its a .tun file not a .ctz but I can't convert it. For some reason it says my v2 is not compatible with this software.
AARRggghhh!!!
swingtan
February 11th, 2013, 02:44 PM
When you flashed the firmware into the V2, did you reformat the V2 config file system and reload the new script files?
PS: Don;t forget to take a current copy of your setup when doing this.
TJWells
February 11th, 2013, 03:47 PM
Errrrr.... Uhhhhh.....
Maybe?
Aparently I had a copy of v7.5 build 204 on my desktop and I clicked on it by accident returning me to build 204 instead of build 211 like i've been using.
reloaded build 211, everything flashed fine. I am a little confused though on pids. I loaded all pids in yellow section for e38 and all in blue for ls1b.
considering It's what I'll be using mostly. Now I gotta figure out which ones to log by your tutorial swingtan. Can you tell me what chart to use to monitor my ben pid cells while driving (B8???).Confused on script files though. Can you explain? I believe I did because it worked fine. I flashed options and settings per tutorials I found to setup fsv2.
Thanx!
Appreciate all your help, And if I can ever help please ask.
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