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Wow! Are those numbers on the stock engine?
 

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I wonder if the characteristics of a bigger turbo are easier on the rotating assembly versus the stock unit.
 

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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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I owned a 2001 Focus and put well over 200,000 miles on it. I love to see guys taking caring of and improving older models. Not a fan of all of your choices, but overall I love it. Subscribing to see what else you do.
 
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