Anyone else using MegaSquirt on a LA motor?

BigBlockMopar said

Looks like a fun project.
I specially opted for keeping the HEI-7 in the loop in case I might fubar something with the MS3 ECU, as I still have some additionial wires to hook up.
The engine will still run on HEI-module alone, just without any advance curve.
Being this is my dailydriver I want to keep a backup-system ready at all times.

I plan on incorporating fuel (propane) on a later point in time.

Click to expand...

I've been running MS2 on my turbo magnum small block. built the whole system. I control ignition and fuel with it. I love it, there's just so much tuneabilty and options to run anything. You can change ignition and fuel curve on-the-fly, engine running. With MS, you spend little but learn a lot. Other kits you spend a lot and learn very little. I used a super cheap ($8) Bosch bip373 Ignition driver to control the coil. Hides right inside the Ms box.

Looking at your ignition advance table, you have spark advance really high up there. I'm assuming it's because the distributor is phased too far retarded, so you have to manually advance the timing in the tuner studio graph to make it right. There's an option for "ignition offset" in the studio where you can add advance instead of adding advance in the graph. So if your graph says 18* at 900 rpm, but your timing light says anything but 18, adjust the ignition offset to get 18. Then your MS is in sync with your whole distributor system. But, it's only to adjust little inaccuracies. I set my distributor rotor to match up perfectly in line with the cap so the spark will jump the smallest gap throught the entire advance curve. Basically the rotor points directly at #1 terminal at 25* btdc. That way, at idle the spark gap lags #1 cap terminal and leads the terminal at max advance. Lock the dist down. Start it up and adjust ignition offset to get the exact timing your graph demands.