Microsquirt timing- how?
So I recently decided it was time to try and get some control of my engine and try and improve driveability.
Car is a 91 GT. Motor is a very fresh 351- Canfield heads, mid .500 hydraulic roller, etc. intake is a typhoon and I have 30b injectors.
I bought the efi source microsquirt kit. It was literally plug and play and came with a base tune. I removed both o2ís, plugged drivers side header and installed an AEM wideband in pass side.
Opened tuner studio, changed engine and injector size, set required fuel, selected wideband and inputted wideband specs. Fired engine.
It started right up much to my amazement. It smelled rich- adjusted fuel table down some just to get mid 13ís on gauge.
But my question is timing. Tuner studio shows 20 degrees at idle. So I went into ignition settings, selected fixed timing, set it to 12 and started engine. Matched timing to 12 degrees on engine, spout out. Idle sounded great. Saved tune, changed to table settings, replaced spout, and started car.
Idle surged and gauge shows 20 degrees.
So, I went through the same process with spout in. But used the trigger offset to get timing light to match the 20 degrees the gauge shows. Still have some idle surge but better. Car smells pig rich.
What am I missing? It revs great, total timing maxes at 36 when revved.
Yes Iím new obviously at this. Iíve researched and canít find much. I havenít driven the car yet until I know I have the timing correct. Then I can autotune to get me closer.
Thanks for the help.
91 Mustang GT 5 speed 351W, .040, Canfield CNC ported heads, .544 lift hydraulic roller, 1 3/4" long tubes, Typhoon intake, 30 lb injectors, 4.56's with spool and 35 spline axles, Draglites.
92 Bimini Blue hatch 5.0 AOD completely stock with 26k miles