Quote:
Originally Posted by donaldt
the piggy is there to trick the sensor so that the valve does not open so quickly, and therefore the boost maintains higher
how much does it cost to produce such a unit? probably not much
why does AC and Hartge ask for so much more?
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Not exactly....at least the Hartge box I have tried does a lot more than just increasing the boost pressure. There are connectors for Air-Flow mass sensors, fuel pressure sensors, camshaft sensors etc (5 sensors) in order to monitor an array of parameters and also make sure that everything is working within safe limits. If the tunning box detects any problem with the tunning, it dissables it. I am sure the AC unit works in a similar way.