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Old 09-08-2000, 04:43 PM
G-Man G-Man is offline
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Join Date: Sep 1999
Location: SW Colorado USA
Posts: 296
In my quest to get more power from my '90 M103 I think I have found one limiting factor. I would like to add a vortech supercharger to the engine. It seems that engines that use a mass airflow system to calculate the fuel metering are easy to modify. If you add more air they add more fuel within the limits of the injectors. I am not sure which system is on my truck, Bosch LH maybe. How does this system work? Does it use a speed density system with a computer map, reading the various sensors, throttle position, temp, rpm etc. to determine fueling from a programmed set of variables? I would guess that this type would be very difficult to program for more airflow. I know my 944T uses a vane (barn door) type sensor to measure incoming air. I do not see this on my M103. Any clarification of the workings of this system and any know ways to alter it would be appreciated.

90 300GE 5sp
95 740iL
86 944 Turbo
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