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I add a bit more advance under vacuum at light load. It helps overcome the low end losses before the turbo spins up. Retarding timing throws more heat to exhaust, increasing turbo drive, but also reduces efficiency. Having knock detection is benificial. Fuel mixture plays a large part...

Blow thru, fuel inject. Turbo likes load, use lower number than 3.55. Speed shifting is important to keep throttle wide open. Auto trans works good. I designed ECU for 2.2L Mopar. It does direct ignition, fuel and idle control, with WBO2. 3D fuel, ignition and desired WBO2 tables. The...