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Post #21, you show a larger turbo. My point is, plenty of people have blown up the engine on a stock turbo, i wonder if a larger turbo is easier on the internals hence being able to make high 300s on cast pistons.
 

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Discussion Starter #28
Post #21, you show a larger turbo. My point is, plenty of people have blown up the engine on a stock turbo, i wonder if a larger turbo is easier on the internals hence being able to make high 300s on cast pistons.
Ahhhhh gotcha. After talking to Brian @ JST, it's much harder to lspi on a larger turbo.

Stock internals seem to be good until 420ish whp. You may be correct.

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