megasquirt bmw m20
This is called a 60-2 (sixty
minus two) wheel as there would be 60 teeth except two are missing.
Here's a quote for an ECU setup to control fuel, ignition, and boost on
this car.
MS2357-C $405 Assembled Megasquirt-II with V3.57 PCB
MOD_2357IGN1: Single Ignition Output through BIP373 coil driver $20
MOD_x357-VR_IN: Jumper unit for VR Ignition Input $0
MOD_x357-VR_IN: Jumper unit for VR Ignition Input $0
JimStim-C $88 Assembled JimStim test board
MSHarness $65 12' wiring harness
EBC_Sol_kit $38 EBC Electronic Boost Control Solenoid Kit
IATwPiggy $22.25 Intake Air Temperature Sensor
38NPT-Bung_A $9 Aluminum bung for IAT sensor (Also available in
stainless steel)
TuneCable $5.50 6' DB9 tuning cable
USB-2920 $20 (Only needed if your laptop doesn’t have a true DB9 port)
Subtotal without wideband-- $672.75
The wideband oxygen sensor is a very useful tuning tool. Almost all dyno
shops have wideband sensor systems they can install temporarily when
tuning your car on the dyno. It's almost essential to have a wideband if
you are tuning a standalone yourself, particularly on a turbo engine.
With a wideband sensor, you can also run at closed loop under boost and
use the sensor to target a rich air-fuel mixture to keep you out of
detonation. Megasquirt works with most popular aftermarket wideband
oxygen sensor controllers. We carry the Innovate Motorsports line. You
can find pictures of the gauges on our website.
Wideband Options—
LC-1 without gauge $199 (you can still view real-time AFR and datalog
AFR through your laptop)
LC-1 with Westach analog gauge $258
LC-1 with DB digital gauge $229 (available in red or blue)
LC-1 with G series analog gauge $289
LC-1 with XD-16 digital gauge $329
LM-2 basic data logger with one sensor $349
LM-2 deluxe kit with one O2 sensor $479
LM-2 deluxe kit with two O2 sensors $669
I think this will give you a pretty good start in the right direction.