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What size turbo what psi are you running? A stock mode 90s Volvo was like 110 hp the same motor with a Garret t3-4 well close to it running 7.5 psi boost stock form was like 150 hp. Honda guys turbo the 1.5 1.6 liter motors 110-125 stock and push 400+ hp. So way to many variables. You can tweak the psi to make more power but then there is also spool time little turbo quick spool overall lower psi capability. Big turbo long spool up time but high psi 20+. So run two a little and a big no lag and big top end. Volvo s80 turbos use that set up. So you need to clue us in what the goal is you could also build a jet engine out of a turbo.
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