This is a VW Beetle from 1966 that has 2litre engine and soon-to-be complete VEMS conversion.
Note that queries without missing basic info (cylinder count, firing order, etc..) are answered with a delay, or kept waiting for info.
- 4 cyl even fire
- firing order 1-4-3-2
IAT and CLT (well, engine temp)
I'll use
- a WebShop NTC resistor for IAT
- a stock thread size NTC-type coolant sensor for cylinder head temp (this is an aircooled => no coolant)
Injectors: 240cc Saab 9000 Turbo ones (donor car for EFI and eventually turbo conversion).
Ignition: Two Lancia Delta Integrale wasted spark coils (2 cylinders each)
I've made an EFI conversion together with fabricating fuel rails, injector bungs, new intake manifold and RPM trigger.
Trigger
DONE: Primary trigger: simple trigger means 2 welded iron pieces placed appr 70 BTDC, sensed with 1GT101.
Secondary trigger options:
- one M8 bolt to the crank, sensed by a 2nd 1GT101 sensor
- can only be run in wasted spark mode (2x2 coilpack is a good idea anyway)
- one pulse on the cam (either an M8 bolt sensed by a 2nd 1GT101 sensor, or some other optical or HALL solution or distributor gear).
- note that you can also place the M8 bolt to the crank, between the 2 already placed simple-trigger bolts sensed by same HALL sensor. That makes a 4-1 missing tooth setup. This saves you a HALL sensor and some hassle. Q: Is it important where exactly weld additional bolt/teeth on the crank? Is it ok to weld it 90 degrees from the other two teeth?