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Jespers Mercedes 190 2.3-16v Cosworth.
The car is initially built as a normally aspirated car but pretty much everything for a turbo engine is gathered too. |
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Jespers Mercedes 190 2.3-16v Cosworth.
The car is initially built as a normally aspirated car but pretty much everything for a turbo engine is gathered too. The VEMS unit for this car is custom built on a v3.1 board with a custom cooling solution to make it easy to service. ---- The car runs now and the rpm signal is very steady, the idle quality and that it looks like photograph when strobing the engine confirm this. I consider the steps taken to reduce noise to be successful. |
| The VEMS unit in this car is custom built on a v3.1 board with a custom cooling solution to make it easy to service. |
| Unforunately we had to reverse the polarity of the sensor to make this work, the engine now trig around 23deg BTDC. That will not let us use enough ignition advance and we will examine this further. |
| An other slight problem was that the ignition coil on the car turned out to have almost no inductance at all!! It must be a CDI coil or something like that as it blow a 15A fuse at 1mS dwell!!! We replaced it with an old breaker point coil (that started to make decent spark around 6mS dwell) for now and will replace it with a suitable coil ASAP. |
| To confirm this, you can measure resistance or with diode mode (over the ends of the cable) and find that there is no galvanic connection. |
| To confirm this, you can measure resistance or with diode mode (over the ends of the cable) and find that there is no galvanic connection. There is no series capacitor The sensor measures out to 840ohm.-JK |