Got a 2005 STI --- what is the normal boost

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04-04-2005, 06:21 PM

razerx

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Car Info: 2005 STi

Got a 2005 STI --- what is the normal boost

So i have a dealer installed boost gauge what is the boost patter and maximum boost. The gauge measures in mPA.

DG

04-04-2005, 07:40 PM

HomerJay

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I believe 14.5 is max boost.

04-05-2005, 07:41 AM

razerx

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is that PSI?

04-05-2005, 08:26 AM

kts262

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Car Info: 05 Black w/ Gold STi

14.5psi = .1 mPA on the gauge.

04-07-2005, 06:48 PM

HomerJay

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Actually it's more like:

0.099999995 mpa

04-07-2005, 07:21 PM

resident smurf

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lol why'd they decide to measure boost in pascals?

04-07-2005, 07:26 PM

resident smurf

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http://www.sengpielaudio.com/calculatorPressure.htm

.1 megapascal = 14.5037626 pounds per square inch
so full boost is basically the .1 mark on your dial that reads in kPa. but boost gauges are only consistent at one thing... being consistently innacurate. so if it's close to .1 you're probably just fine.

04-08-2005, 09:40 AM

razerx

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great is there a boost pattern, i.e what rev range should maximum boost be produced?

04-12-2005, 07:44 AM

solo2wrx

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Car Info: 2005 Subaru WRX

Max boost begins to fall off as you get towards redline because of the increase in cylinder pressure. Subaru and basically any other car manufacturer has the same setup to drop boost off slowly to not risk a chance of too high a pressure. (ie. blown headgaskets, piston rings, or the wearing out of seals that much quicker) Max boost on my standard WRX comes at about 5700 rpm.