I finally got off my *** and installed my NeoBrain
piggyback megasquirt. What the hell was I thinking?, driving the past 8k turbo miles on fmu. Don't buy it from me when I post it, pm braineack instead.
(Piggyback, hi-res, 460cc, map, no variable tps or cops, yet)
Acceleration is great, smooth and consistent power. No rich, then lean, then too rich to run crap. Using a basemap provided by our esteemed brain, we leaned it out a little and then richened it up a bit because of a little knock, and got it about right where we started, just a bit smoother. Reaches full boost (10.5 psi now) at 4100rpm with the GT2860, at 70% duty cycle with 460cc injectors. Starts at 12:1 afr and gets closer to 10:1 at redline (relatively cold ambient temperature).
Before I start messing around, I have a few little hiccups I need advice on:
1. Cold start is so rich it vapor locks and then starts but misses really bad until it warms up a little.
2. At cruise under certain loads, lifting off the throttle a little bit causes it to go rich for a split second and jerk. It is hard to keep it steady at cruise (AFR’s around 16:1)
3. After a 20 mile drive, it started idling at 12:1, although very smoothly. If I restarted it warm (starts pretty well), it idled at 13.5 to 14 to1.
4. My tune seemed to change with the outside temperature, isn’t megasquirt adjusting for air temperature?
I am really sorry about needing so much “hand holding” but I really want to get this right.