My project car is a 1st gen Saturn I've had for years.
I've been working towards turbocharging it, but I always find myself in the research/engine=can o' marbles stage.
So, finally time to get going on this, shopping list/plan is as follows (comments appreciated):
genboard
6 fets
1 dpak fet
idle stepper driver
later:
WBO2, harnesss, connector
cam sync generator
egt thermocouple/connectors
COP plugs
4 igbt drivers for COP
Genboard 3.3
no case/connectors
stock computer case and connectors (attempt at plug and play)
Use jumper wires and a stub board to connect from genboard to connectors removed from stock computer
Drivers:
fets:
4 injector drivers (driving 36lb low impedance injectors from a thunderbird)
batch fire 2+2 for now, hopefully sequential later
1 wbo2 heater
1 power steering orifice (pwm to control properly? need to scope, probably add later)
1 boost controller (using an egr solenoid probably low current, use extrafet spot?)
idle stepper driver - for the idle stepper...
TPIC:
egr control (stock solenoid)
canister purge solenoid (stock)
fuel pump (via relay)
fan (via relay)
air conditioning (probably relay, but might need to move to extrafet)
3 - stock check engine, coolant temp, and shift lights
DIS bypass signal (external circuit/igbt channel ?)
bypass an igbt channel and directly drive the est signal to the DIS
Sensors:
stock coolant temp sensor (standard GM type)
stock air temp sensor (same)
stock knock sensor (ditto)
2 bar GM map sensor
crank position signal from DIS module (square wave, hallish? even though sensor is inductive)
cam position signal from cam sync generator http://www.msdignition.com/sci_16.htm
stock throttle position sensor
stock nb O2, upgrade to wbo2 once running
Issues:
Getting the speedometer to work as it's driven by the PCM which takes the speed sensor signal and does the math to accomodate different size tires and then sends it to the speedo. This may be doable with an external part, will worry about this later...
Need a digital input for AC request line.
Reading the crank signal from the DIS should be easy because it's just a square wave. Controlling may be more difficult as it needs high or low so the igbt won't work. Since the ixdn404si can pull high or low, jumpering the igbt pads would do the trick or just connect directly to chip (maybe configure as input?). Cam sync signal is also in the same format, but won't be useful until sequential injection comes into play.
Gameplan:
Wire up injectors, idle stepper, and sensors, get idling with DIS controlling ignition, then get DIS working, then all the other niceys/emissions as time/money allow.
This car has a GM DIS, see http://www.saturnfans.com/photos/showphoto.php/photo/20073/si/crank for a crank picture or http://www.megasquirt.info/ms2/GM_DIS.htm for more general info.
From discussions on IRC, it doesn't sound like anyone's worked on this sort of set up.
Possible/probable roadblocks requiring extra code are:
sync pulse comes 70 ATDC #1/4
it's an extra pulse instead of missing and it's just plain wierd compared to the rest