Hi guys,
I've got an M20B28 with the standard injectors. It's got a wideband fitted, and I've got a Miller WAR chip (mapable chip for the factory ECU) to go with it.
Happily, I've got a spare ECU with what looks like the factory 325i map on it, which I was going to be the WAR chip into, while keeping the '2.8' chip in the original ECU.
I tested the spare ECU earlier and it worked - much to my surprise, the car fired up and idled/revved as normal - I couldn't drive it, so don't know what it's like under load (I thought maybe it would run, horrifically, but at least confirm the ECU circuitry was intact, even if the map was awful).
Anyway, I'm guessing there's nothing different about the E30, and I should be aiming for around 14.1 (or slightly leaner) at idle/cruising, and slightly richer 14.1 under load/WOT?
Cheers,
Joe
M20 air fuel ratio
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