Crankshaft and camshaft position sensor for electronic fuel injection upgrade. Porsche 911 1974 to 1983
Porsche 911 / 911S - 1974 to 1977
Porsche 911 3.0ltr Carrera - 1976 to 1977
Porsche 911 SC - 1978 to 1983
For cars with CIS fuel injection
Why do you need this system and what are crankshaft/camshaft position sensors?
When converting classic Porsches to modern electronic fuel injection, the engine control unit (ECU) needs to know exactly where the crankshaft and camshafts are in there 4 stroke cycle and how fast they are spinning. This allows the ECU to correctly time each spark and fuel injector opening time and duration. The first sensor is pointed at the crankshaft pulley and measures a pulse for every tooth. There is one missing tooth and from this the ECU can work out what the crankshaft position is relative to this missing tooth. The time between pulses gives the engine speed and rate of change.
But there is a problem, the engine spins two complete revolutions to complete its 4 stroke cycle. So whilst with this one sensor, the ECU knows where it is relative to top dead centre (TDC), it does not know if it is on the compression or exhaust stroke. This is where the second reference sensor comes in. This sensor is installed in the body our module, and measures a single tooth. As this is installed in the distributor hole, this is geared to run at half engine speed, so will produce a pulse once every 720 degrees. With these two sensors, the ECU knows the exact position the engine is in its 4 stroke cycle. And now, we can run accurate sequential injection and ignition.
Our kit uses high speed digital hall effect sensors for a digital output to the engine control unit, these are best run at 8V, most modern ECU's have an 8V output dedicated for crankshaft sensors.
Machined aluminium housing and anodised finish, complete with maintenance free bronze bush and sealed for life roller bearing. These sensors are quite adjustable so are often able to be used with existing crank pully and trigger wheel setups from other quality vendors.
Sync 2 Kit Includes:
Main body assembly
ZF Hall effect sensors x 2
Wiring and connectors, with pins and connectors for connecting to your wiring loom.
For use with other crank trigger systems.
(We can not guarantee that that this system will fit every crank/trigger system, however it can be easily modified to suit most systems)
This replacement kit fits to the OEM distributor location using your own factory distributor gear. Simply remove the factory distributor gear from your install the gear, wire to your ECU, fine tune the sensor air gap to the crank trigger disc, setup the reference position in the ECU and you have all the sensing you need for the latest sequential fuel and ignition systems. This kit works on the 2.7lre, 3.0ltr and with the turbo distributor gears.
2.7 engines may need to trim some of the crank case near the crank pulley to prevent interference.
- Porsche 911 1974-83