G.9.9) Intercooler Spray

I am convinced that the usual theory about intercoolers is flawed - their primary effectiveness is not to cool the air from the turbo when at a steady speed, etc., but (in my humble opinion) is to act as a heatsink by which the compressed air from the turbo can be cooled during hard acceleration, etc., Subsequent driving cools the intercooler which then can act as a heatsink again. In other words it helps to damp rapid increases in air temperature.

Using the OBD reader to trigger it, I fitted a high pressure pump, reservoir and fine misting nozzles to my Saab Viggen, directing the mist onto the intercooler.



In simple pseudo-code:

IF obd.tempInlet > 40 AND obd.speed < 25 THEN
    Spray
END IF
 


The smart money seems to be on using a mixture of methanol and water, the methanol evaporating more quickly. 

Did this work? Yes, when accelerating the inlet temperatures were lower than without it.

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