Good morning gentlemen,
still in the work to "tune" my M110.994 in a mercedes g-wagen, 280GE, id like to update the current progress.
the far goal is to fit the car with a roots-compressor, this will be together with some other peripherals from the SLK230 / R170: a/c-compressor and generator and the compressor itself.
to do so i decided to rip off the COMPLETE k-jetronic to do spark & fuel on a fully electronical way. this to be able to meter the amounts of fuel & air and to have total ignition control.
the first step was to get the needed signals for the motor-management-controller ( a self built unit called megasquirt). so the damping wheel was cut to have 36-1 flanges on it. thats one each 10° but one missing to signal a full round. ignition itself is done by a ford-edis6, wasted spark. there are no moving parts, 2 sparks are fired together. as this works perfectly i moved ahead to the next step to rip off the rest of the k-jetronic. a fuel-rail was built, coolant and air-temperature-sensors together with a throttle-position sensor was installed. the fuel-pump and filter was useable so i only needed to install a fuel-pressure-controller, vacuum controlled.
here are some pictures form the built so far:
the trigger-wheel, formerly known as damping wheel.
the lambda-controller on top and the ignition-coil. a lambda-sensor was installed to have information about the current conditions and lambda during drive, makes tuning much easier. the ignition coil has 3 seperate-ignition coils in it, firing two sparks the same time
Fuel-Rail Test setup.
another test, with pressure-controller attached.
another test, note the missing distributor :-) you can see the TPS-sensor as well.
Now you have total control. the ignition is set with a laptop
currently im doing test-drives with the car to get the optimum mixture for efficency and power. as some sideeffects you now have overrun-fuel-cut (example: if RPM above 1500, coolant above 71°C, manifold-pressure below 40kPa and these conditions for at least 1,5sec the fuel is cut off - very fuel saving!)
as these conversions are not very "original-like" everyone has to decide to go this way or not. as i ripped off i noticed that EVERY rubber-hose has leakage and would need to be replaced.... as the car is used in an offfroad-environment "originality" was not the first point on the list... and, to go on attaching a compressor is - apart form the mechanical-aspects (polybelt instead of normal belt, mounting etc..) - quite easy. if you are going normal aspirated to ambient-air-pressure (wide-open-throttle) or more than that (supercharged) - you write the values into your engine-managment...
if you have further question please let me know.
best regards
carsten günther
Linear Mode
