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on their scion xb zpi actually upped the boost to 12 psi and had about 230 to the wheels but with slicks, the snapped the axles. They said the engine held fine, now for how long is another story. I am shooting for a decent amount higher then 220 to the wheels. but yea a stock bore with beefier components would definately allow for 220 to the wheels. just be careful with our tiny axles. and taking metal away isnt too bad if like i am doing you sleeve it. it allows for a bigger bore, i'm hoping to be able to get a couple mm over bore, maybe have a 1.6 liter engine haha.
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