How to Megasquirt your 3G Hemi
HOW TO ADD GENERIC SENSORS:
The megasquirt box comes with three pre-wired generic 0-5 volt sensor inputs (additional available with internal wiring jumpers added).
There are a number of sensors that generate a 0-5 volt output. I'll be using these inputs for logging oil pressure to make sure I never lose oil pressure on a road course.
Oil pressure 1 (between oil pump and check valve)
Oil Pressure 2 (between check valve and accusump / engine)
Other 'generic sensors' that can be used here:
Pressure sensors of any kind (fuel pressure, nitrous pressure, etc)
Vacuum sensors / MAP sensors
Temperature sensors
Mass Air Flow sensor
Linear potentiometer (measuring suspension or pedal travel)
etc
Step 1: Wire the sensor. Three wire hookup.
Red: 5v feed (use pin 26 on the main megasquirt harness - already feeding your TPS, Cam sensor, and Crank Sensor)
Black: Ground (Use a Megasquirt box ground)
Blue: Sensor output. Connect to Pin 21, 22, or 23 on the MS3x harness
Screen shot of the '3x 0-5V analogue in' pins:
[ame]http://i1271.photobucket.com/albums/jj629/uhcoog1/ACF0E027-7745-4F4B-9E15-5101CE536A83_zpsyq3ylp5f.png[/ame]
I used the following pressure sensors ($18/each):
Pressure transducer or sender, 100 psi, stainless steel, for oil,fuel,air,water
[ame="http://www.ebay.com/itm/261260635816?_trksid=p2059210.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT"]Pressure Transducer or Sender 100 PSI Stainless Steel for Oil Fuel Air Water | eBay[/ame]
Screen shot of the 'description' indicating the linear output for the sensor:
[ame]http://i1271.photobucket.com/albums/jj629/uhcoog1/C0F9A789-0F82-4D60-A481-16816D45DB7B_zpsk43lcn1l.png[/ame]
Set-up within tuner studio:
Go to: Advanced Engine / Generic Sensor Input
Tunerstudio will automatically log these sensor inputs for you once you set them up in the Generic Sensor Input window.
Screenshot of log (middle log), showing sensor 1 and sensor 2. In my case, sensor 1 is the engine / accusump side (red), and sensor 2 is the oil pump side (green). The first half of the log was running a clockwise skidpad in 2nd gear. The second half of the log is running a counterclockwise skidpad in 1st gear. Needless to say, the oil pump pressure stayed at or above the engine/accusump pressure, which tells me I never sucked the pump dry.
References:
http://www.msextra.com/doc/ms3/genericsensors.html
http://www.msextra.com/doc/ms3/hardware.html#wiring
HOW TO ADD GENERIC SENSORS:
The megasquirt box comes with three pre-wired generic 0-5 volt sensor inputs (additional available with internal wiring jumpers added).
There are a number of sensors that generate a 0-5 volt output. I'll be using these inputs for logging oil pressure to make sure I never lose oil pressure on a road course.
Oil pressure 1 (between oil pump and check valve)
Oil Pressure 2 (between check valve and accusump / engine)
Other 'generic sensors' that can be used here:
Pressure sensors of any kind (fuel pressure, nitrous pressure, etc)
Vacuum sensors / MAP sensors
Temperature sensors
Mass Air Flow sensor
Linear potentiometer (measuring suspension or pedal travel)
etc
Step 1: Wire the sensor. Three wire hookup.
Red: 5v feed (use pin 26 on the main megasquirt harness - already feeding your TPS, Cam sensor, and Crank Sensor)
Black: Ground (Use a Megasquirt box ground)
Blue: Sensor output. Connect to Pin 21, 22, or 23 on the MS3x harness
Screen shot of the '3x 0-5V analogue in' pins:
[ame]http://i1271.photobucket.com/albums/jj629/uhcoog1/ACF0E027-7745-4F4B-9E15-5101CE536A83_zpsyq3ylp5f.png[/ame]
I used the following pressure sensors ($18/each):
Pressure transducer or sender, 100 psi, stainless steel, for oil,fuel,air,water
[ame="http://www.ebay.com/itm/261260635816?_trksid=p2059210.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT"]Pressure Transducer or Sender 100 PSI Stainless Steel for Oil Fuel Air Water | eBay[/ame]
Screen shot of the 'description' indicating the linear output for the sensor:
[ame]http://i1271.photobucket.com/albums/jj629/uhcoog1/C0F9A789-0F82-4D60-A481-16816D45DB7B_zpsk43lcn1l.png[/ame]
Set-up within tuner studio:
Go to: Advanced Engine / Generic Sensor Input
Tunerstudio will automatically log these sensor inputs for you once you set them up in the Generic Sensor Input window.
Screenshot of log (middle log), showing sensor 1 and sensor 2. In my case, sensor 1 is the engine / accusump side (red), and sensor 2 is the oil pump side (green). The first half of the log was running a clockwise skidpad in 2nd gear. The second half of the log is running a counterclockwise skidpad in 1st gear. Needless to say, the oil pump pressure stayed at or above the engine/accusump pressure, which tells me I never sucked the pump dry.
References:
http://www.msextra.com/doc/ms3/genericsensors.html
http://www.msextra.com/doc/ms3/hardware.html#wiring
