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Old 06-12-2017, 02:44 AM   #753
Scooby Guru
Member#: 82745
Join Date: Mar 2005
Chapter/Region: SCIC
Location: So Cal
2005 Subaru STI
2003 EJ207 S204 Wagon


Originally Posted by Nick411 View Post
Depends on the dyno. One of my local dynos reads 250-260whp for a bone stock '06 STI, which is a Dynojet. Another reads 200-210whp, Mustang Dyno. There's also one we have around that reads 170-180whp, which happens to be the heart breaker Dyno Dynamics. And the Dynapacks around here read about 220-230whp. You can't just through around numbers saying a car makes XAAwhp stock and saying someone else's XBBwhp is wrong.
Actually I can and here's why. The factory rated OEM power for an STI is 300bhp. This is a government agency confirmed output of the motor. So if you have some crazy low reading dyno saying the whp is 200. That's way off the actual parasitic drivetrain loss which is somewhere around 20%. Which means the numbers are off so it's bogus.
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