I've already bought and installed the 7x external crank trigger. I did this because I thought that the Megasquirt wasn't able to read the 'odd' crank reluctor on the LX9. The downside of doing this was that I had to use a 3100 DIS ignition complete with ICM. If I can get the megasquirt to understand the crank reluctor, I can set the megasquirt up to use the coil near plug (CNP) setup that the 3500 uses. In other words, the coils are fired directly from the megasquirt. Or, instead of using the 3500 CNP setup (which is not really 'near'), I can use a LS1 CNP setup or better yet, use a COP setup.

To do this, I need the megasquirt to understand the LX9 crank reluctor. I knew the megasquirt supports the LS1 crank reluctor which looks a lot like the LX9 reluctor, but it was my understanding that the LX9 reluctor is 58x whereas the LS1 is 24x. Well today I plotted the LX9 reluctor and then plotted the LS1 reluctor. I used 'A' for long and 'B' for short, and 0 for the forward wheel (in the pictures) and 1 for further. These are my results.


LS1 = A1B0 B1A0 B1A0 B1A0 B1A0 B1A0 A1B0 B1A0 B1A0 B1A0 A1B0 A1B0 B1A0 B1A0 A1B0 A1B0 A1B0 B1A0 A1B0 B1A0 A1B0 A1B0 A1B0 A1B0
LX9 = A1B0 B1A0 B1A0 B1A0 B1A0 B1A0 A1B0 B1A0 B1A0 B1A0 A1B0 A1B0 B1A0 B1A0 A1B0 A1B0 A1B0 B1A0 A1B0 B1A0 A1B0 A1B0 A1B0 A1B0

EDIT: I have rearranged the order so that it matches what the CPS sees. I basically mirrored and reversed the previous. I also started in a different location to match the LS1 configuration for TDC #1 compression.

They are the same.

So my next step is to determine where the wheel is at TDC of cyl 1. Brad, I used your picture of the crank reluctor when I plotted. I noticed you marked the reluctor. Did you mark that TDC cyl1?



Is there anyone who has a LX9 crank laying around that they can determine TDC cyl1 for me?