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.
- try to place the extra tooth appr in the middle (90 deg from both). It is NOT very important that it is deadly precise (not timed from this), but you can certainly do it within 90+-6 deg, so 96/84=1.14 far from 1.5 so not mistakenly considered as "missing tooth", even with default thresholds (without multitooth advanced filter).
- primary_trigger=01
- secondary_trigger=02
- tooth_wheel=03
- trigger_tooth=00
- ign_tdcdelay=8c # decimal 140 for 70 crankdegrees