Hi everyone just wanted to know if anyone out there is running a turbo or supercharger setup, on the stock M104 HFM ecu setup, and if so how much boost can the HFM system handle before a piggybank/aftermarket ecu is needed or required. I have just started turbocharging my car so i'm tryin to figure out my options, not looking to run more then 6psi at the moment nor do I plan on lowering the compression. Any useful advise would be welcome.

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