Cheap boost retard?
Ok so I think I have an idea for a boost retard unit.
If you have a voltage outputting intake temp sender, it could potentially be used as a boost retard unit if a MAP sensor is used as an interceptor.
If the temp output is used as the earth for the MAP sensor, earth is used as the voltage input, the output of the map sensor then contains both intake temperature AND boost information. This setup would see the voltage falling towards zero as the boost increases.
Now all I need to figure out is how to make the output of the map sensor equal to the input at zero vacuum, and change as boost increases, instead of it being constantly modified (atmospheric pressure is normally half way through the range on a 2 bar map sensor).
*of course this would have an unknown effect on timing unless you had access to both the IAT sensor output data, and the contents of the Air temp/Ignition Timing table in the ecu. It may also reduce fuel input. But one things is for certain, if you make the computer think it is hotter, timing will be reduced.