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Originally Posted by tommy_thrash
What do you think a A'pexi GT spec exaust would do to a semi stock S13 with a SR20det that has a few upgrades, about 250hp?
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No. Not without a LOT of boost. You might see somewhere close to that with about 17 psi on the stock turbo...but I doubt it. More likely with a T28 set to about 14-15 psi.
You were talking about RWHP right? Or where you talking about power at the flywheel? My car is pushing 11.5 psi right now with a full 3" exhaust, and I'd guess it's making around 210-220 at the wheels. On a cold day.
Eric