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Power Strokes
7.3 Aftermarket
gtp38 Billet WW2 sales start
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[QUOTE="Dieselsite, post: 575529, member: 9966"] What shaft speed is the max? What boost is the max and with what drive pressure? When you change efficiency of a turbo, IOWs, more air flow per rpm, you do in fact change the "size". In fact, I've stated it before. Garrett did this with the 4294 vs the 4294X. Billet wheel, more boost, 15% more air flow. Bob [/QUOTE]
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