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Originally Posted by curtis73
If you're flexible on engine displacement and target boost range, 6.0 powerstrokes have a Variable vane blower that should be in the junkyards by now. Not cheap, but cheaper than new. There aren't many trims available for that setup but it might be a close enough trim for you.
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The engine I'm running is an Isuzu 4BD1T, basically a japanese copy of the cummins 4BT at 3.9 litres. I'm in New Zealand where the vast majority of automotive stuff comes from japan (we import their cast-offs and drive them into the ground). American engines are almost non-existant.
A stock variable vane of a 6.0 might reach down to a lower range than my current turbo. But I've recently got a Gt2052V from a 2.5L audi diesel to play with. It's pretty small but the air requirements of a low speed 3.9L and medium-high speed 2.5L aren't too far off.