Overview:
My name is Karl Buchka. I am a third-year Electrical Engineering student at The University of Massachusetts Amherst. The car is a 1979 Volvo 242 with a 1995 Volvo 850 Turbo engine (B5234T).
Some details on the car:
- Inline 5-cyl., 2.3l, turbocharged (TD04H-15G), 4 valves per cylinder. The engine is essentially stock, save for a new (OE Volvo) intake manifold and 350cc injectors. At 15psi on the current setup I flow fuel for approximately 250bhp.
- VEMS 3.3 will replace the current setup of: MSnS-E 029y4 on a V3 PCB with sequential COP, batch fire injection, boost control, fan control, tacho output, two-step, and a Just Another Wideband (JAW).
VEMS Setup:
Apart from the standard sensors (MAP, CLT, IAT, TPS), I'm planning on setting up the VEMS with the following major functions:
- Sequential coil on plug
- Sequential injection
- Single channel wideband and EGT
- Dual channel knocksense
- Fan control, boost control, two-step, tacho output, shift-light, 20x4 LCD
Trigger settings:
The engine comes from the factory with a 60-2 wheel/VR sensor on the crank and a single tooth wheel/hall sensor on the cam.
Goals:
My initial goal with this install is to overcome the limitations of Megasquirt (some of which I have reached, others not), putting me in a much better position to take the car to the next level. Also to have a good time with it, and possibly learn something useful along the way.
Shopping cart:
I have just (Sept. 25, 2008) ordered the following from the VEMS shop:
- GenBoard v3.3
- Power Flyback - With wire yes
- Econoseal36-PCB
- Econoseal18-PCB
- EconoSeal36-Wire side
- Econoseal18-Wire side
- Alubos EC frontplate - Drill-count 3 small
- Alubos Endplate - Drill-count 4
- Alubos1600 - Drill-count 6
- Ignition driver insulator - Size 2lines
- Pneumatic tube
- Pneumatic connector
- VEMS sticker - Color 9-pack
The following items have been ordered from Newark and/or Mouser (significant cost savings over VEMS Webshop):
- IRGB14C40LPBF - Ignition driver FET, 3pcs (2 for board, 1 spare)
- MPXH6400AC6U - 400kpa MAP sensor, 2pcs (1 for MAP, 1 for exhaust backpressure)
- RH0506R000FE02 - 6R 50W power resistor, 5pcs
- FQPF20N06L - Injector driver, 8pcs
- TPIC8101DW - Knock sensor interface, 1pcs
A 20x4 HD44780 LCD and MAP sensor mounting boards were also purchased from SparkFun.com
I have decided to purchase the un-assembled GenBoard for a few reasons: I'm doing this as much for the learning experience as for the VEMS feature-set. If I wanted a 'plug-and-play' system I would buy a Haltech or Motec. A more minor motivator is the lower price.
Sections: (most of these are incomplete, will continue to add info and break into sections as time permits)
Crank and cam sensors/settings MembersPage/KarlBuchka/Trigger
Sensors and inputs MembersPage/KarlBuchka/Sensors
Fuel (Injectors, VE, lambda, enrichments) MembersPage/KarlBuchka/Fuel
Spark (Coils, Spark advance) MembersPage/KarlBuchka/Spark
Outputs/ancillaries MembersPage/KarlBuchka/Outputs
(Fan control, boost control, shift light)