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Originally Posted by kingbriani
how much of a difference will a bigger turbo(s) make to overall power on pump gas? i was under the impression the pressures were already close to the limit due to the high compression ratio.
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There can be power gains with upgraded turbos due to the reduction in exhaust backpressure and improvements in VE. How much really depends on turbo matching and available octane. On pump gas, I'm guessing we could see 400whp or thereabouts. On race gas, one could get considerably more (beyond the limit of the block I'm guessing).
-shiv