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Re: 89 crew cab k20 4wd twin turbo cummins swap
There's an internal waste gate on the smaller turbo and nothing on the larger one, but i'm guessing the smaller phatshaft needs to open up when the larger s474 spools up. I try calling industrial injection but I can never reach anybody.. A few threads on the cummins forum said they had to drive a couple hundred miles before the turbos were broke in? I've never heard that before. What are you running for boost on your set up?
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