Engine/Power - EJ25T (STI and 2006+ WRX) Discussions about the USDM 2006+ WRX and WRX STi 2.5 liter turbo flat-four.

Q: What is 2005 STi stock boost

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Old 01-19-2006 | 12:53 PM
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Weakness's Avatar
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Car Info: 2005 Subaru WRX STi
Question Q: What is 2005 STi stock boost

I'm going to dyno the car as a baseline in the near future and want to document how the car is setup now. I'd like to know what the OEM stock boost setting is on it. THANKS!
Old 01-20-2006 | 12:31 AM
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Originally Posted by Weakness
I'm going to dyno the car as a baseline in the near future and want to document how the car is setup now. I'd like to know what the OEM stock boost setting is on it. THANKS!
14.7 psi = 1atm
Old 01-20-2006 | 12:04 PM
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Thanks very much!
Old 01-23-2006 | 04:23 PM
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i thought i saw that it was 13.6psi
Old 01-24-2006 | 12:03 PM
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Originally Posted by d1nonlybp
i thought i saw that it was 13.6psi
That's the stock WRX boost if I'm not mistaken.

Dave
Old 01-24-2006 | 02:40 PM
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Originally Posted by PRO 5
That's the stock WRX boost if I'm not mistaken.

Dave
Correct
Old 01-25-2006 | 08:45 AM
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Ok - So do we have a concensus that a 2005 STI is 13.6psi then?
Old 01-30-2006 | 10:59 AM
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No, the factory setting is 14.7. That may be the spec but mine consistantly reads 1.1 Bar (just under 16 psi). That's what my Defi gauge peaks at. My car is stock.
Old 01-31-2006 | 01:59 AM
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Originally Posted by Weakness
Ok - So do we have a concensus that a 2005 STI is 13.6psi then?
Theoretical stock boost on an 05 STI is 14.7 psi = 1 bar = 1atm
Old 02-07-2006 | 01:13 PM
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My stock 05 STI has peaked out at 16psi as well. Atleast thats what my Defi gauge says.
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