WBO2 logging with LM-1
Safety Car
Joined: Sep 2003
Posts: 3,599
Likes: 24
From: Orange County NY
St. Jude Donor '10-'11-'12-'13
Yes - I use the LM1 with the RPM converter. What type of problems are you having? Is it just the RPM information from the converter that you are having trouble logging, or are you not able to read A/F ratio information from the meter itself?
Thread Starter
Drifting
Joined: Jun 2001
Posts: 1,625
Likes: 1
From: Zagreb, Croatia
I can log AFR as long as rpm converter is not connected.
As soon as I try to log AFR with RPM I get terrible noise (spikes)
on both AFR and RPM readings.
It got a little better after adding potentiometer (like suggested
on LM-1 forum) but still not usable infos.
I'll try to post my logs later so you'll see what I'm talking about.
Where did you take your rpm signal from?
As soon as I try to log AFR with RPM I get terrible noise (spikes)
on both AFR and RPM readings.
It got a little better after adding potentiometer (like suggested
on LM-1 forum) but still not usable infos.
I'll try to post my logs later so you'll see what I'm talking about.
Where did you take your rpm signal from?
Safety Car
Joined: Sep 2003
Posts: 3,599
Likes: 24
From: Orange County NY
St. Jude Donor '10-'11-'12-'13
Did you properly configure the RPM cable as outlined in the manual?
If so, this could be a grounding issue. How do you have the LM1 meter wired? When I initially started using mine, I plugged the LM1 meter power cable into the cigarette lighter. Turns out the poor ground in the cigarette lighter was causing inaccurate data logs, weird readings, etc. After I hard wired it (and ran the ground directly to the frame), my problems were solved.
I am taking the rpm signal directly from the "tach" terminal in the HEI cap. My MSD 6A box feeds an Autometer tach.
If so, this could be a grounding issue. How do you have the LM1 meter wired? When I initially started using mine, I plugged the LM1 meter power cable into the cigarette lighter. Turns out the poor ground in the cigarette lighter was causing inaccurate data logs, weird readings, etc. After I hard wired it (and ran the ground directly to the frame), my problems were solved.
I am taking the rpm signal directly from the "tach" terminal in the HEI cap. My MSD 6A box feeds an Autometer tach.
Thread Starter
Drifting
Joined: Jun 2001
Posts: 1,625
Likes: 1
From: Zagreb, Croatia
I thought it was ground problem so I wired LM-1 directly to battery.
I have tried with rpm converter grounded, not grounded, it's
the same.
I have configured rpm converter with PC like stated in manual.
Do you use potentiometer on rpm signal?
I have also connected directly to tach terminal on cap.
I have tried with rpm converter grounded, not grounded, it's
the same.
I have configured rpm converter with PC like stated in manual.
Do you use potentiometer on rpm signal?
I have also connected directly to tach terminal on cap.
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