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First off the turbo is stock with no porting. Not sure if porting is ok for it to be called stock.
Lets keep in mind that I can bolt on a fpred for 1500 bucks and make 550 safely with out any changes other than tune and larger injectors. I know of a few guy in FL over 600 with stock blocks.
I don't know what the duty cycle is. I do know to make over 500 I need to go bigger.
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