sounds like you did it fine.

I use .22 - 5v 7.35-22.4, you are right on par.

 

Hey scott, I was thinking, (which usually doesnt end well, lol) Is there any way to get the lc-1 controller to output just a specific value?

Like have it put out lets say 10 afr, so you can compare it with what tunerstudio is seeing, and then do the same for something around 16 afr. That way you could get a more accurate linear progression line. and be more accurate in the area you need the MS to see most accurately?

Cause I know my MS is seeing differently than my gauge, and i know its about an afr off, in the most important spot, around 14 afrs. but everywhere else im not sure,

PS I am going to try your voltage values as well and see if i cant get something more reasonable.

 

just shut the car off then put the key back to the ignition setting but do not start the car
your lc-1 will read much more steady when the motor is not running. and make sure to start the car first so there are exhaust gases in the tail pipe

 

That works, but I was really kinda hoping for something a bit more precise. Ill definitely do that though! thanks.

 

Use LM Programmer. Program the output to do what you want, compare to the MS reading.

for example: make the output as .9v to 1v and 10-20:1, then try 1.9v-2.0v, etc. Sit with the key on like jared suggets and you can compare the various voltage ranges that way.

Really, the issue is simply a voltage offset. The output is linear, as well as what the input is expecting, but when the LC1 is outputting lets say 14.7:1 @ 2.35v, the MS is only seeing 2.15v, so it displays a different value. That same offset is going to be the same through the range.

The best thing would be to do this, and then acutally read your voltage off the LC1 and at the MS cpu. But I found the .22v offset like I've given previously seems to get most installs to match up fairly well.

 

Thats exactly what I was thinking! I just didnt think of a good way to do it, I blame lack of actually using lm-programmer. Thanks scott!