waste gates are used to improve on turbo performance across your operating band, my early cummins has a non waste gated turbo and pumps out about 30 psi of boost. i'm, taking a stab in the dark and I betting this one only makes about 10 psi as kirk says it's an altitude compensating turbo. where the what if comes in is that from what i've been reading is the engine is a 19 to 1 compression ratio which is quite high, kind of like the old 6.2 gm diesels which didn't last as long when you put turbos on them. you will notice engines like the cummins and power joke all have lower compression ratios to allow for higher boost on the turbo.