I converted this car from carb to a Throttle body injection, & used a brain from a 3cylinder GEO Metro. Using a jimstim 1.3 I queried the brain & hacked into it with a soldering iron & some old guitar amplifier parts. It has been a daily driver that way for about a year & a half. Huge improvement in torque & power. Depending on how I set it up mileage was the original 25 MPG US gal, sometimes 30mpg, & down to 21 mpg when I had a sensor failure.
So I dove in & bought an MS last week. What did I learn ?
1: The manuals are tough to read online: http://www.megamanual.com/mtabcon.htm Better retention when printed out & read with a highlighter.
2: A Stimulator is essential to make sense of the tuning program. Build one of those first.
3: The Megasquirt works fine. Using it's built in suggestion tools I came up with a VE table & a REQ fuel. It fired up instantly & ran as well as with the GEO computer after 3 minutes of changing the REQ fuel around.
4: Doing everything at once can make you crazy. I know we all want ignition control, turbo, nitrous & whale sounds at the same time, but start with fuel only, then add ignition.
5: An MS 1 with 8x8 tables is still a great tool. You can always update later, & the simplicity is good for keeping confusion down.
6: This thing is running well without autotune or an oxygen sensor. Don't be afraid, just go for it.
& there you have it. When I graft in an O2 sensor I'll make another post of findings.
Here's to the B& G Fan club.
Runs much better with the ignition than previously with a stock distributor, Why ? Better dwell controll ? Who knows.
Anyway, on to multiport injection. & MSII