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Old 08-27-2005, 12:53 AM   #1
Hokie-wrx wagon
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Default I just installed a boost gauge and I have a boost question...

I installed a factory boost gauge on my steering column (lamco) and had some questions.

It looks like my max boost is .08-.09 bar. Is this correct for a stock wrx?

After it hits .08-.09 bar, it stays there for a second then drops to .06-.07 bar above 4000 rpm. Is this normal?

I tightened and zip tied the vacuum lines as good as I could to the T fitting near the fuel pressure regulator. They lines weren't an extremely tight fit over the T fitting, but were somewhat snug...

Thanks,

Mike
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Old 08-27-2005, 12:33 PM   #2
Hayes
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Why the bleep Subaru does'nt offer a gauge that reads in PSIG for the American market is a joke. I suppose it make for a good discussion at the coffee table. Their own manuals talk about boost in psi so what's with thir guages. Dumb Dumb Dumb.
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Old 08-27-2005, 12:50 PM   #3
Thingfish
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The stock gauge reads in MPa,Mega Pascals. .05Mpa = 7.25psi , .1 = 14.5 psi. Stock boost should max at 13.5psi, just under .1 Mpa.
Yes it is normal for a stock turbo car to taper boost at higher rpm.
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Old 08-27-2005, 12:51 PM   #4
fireball_jones
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.8-.9 would be about right, I usually see 14 psi at WOT, which is .96. But I usually don't see the boost drop that much until much higher RPMs.
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Old 08-27-2005, 05:17 PM   #5
jjasper14
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Mine won't get above .05. Even when it's to the floor. I don't know why. I'm hoping that it's something with the gauge, because the car feels like it's got plenty of power. If anybody's got any suggestions, let me know.

Jonathan
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Old 08-27-2005, 06:27 PM   #6
Hokie-wrx wagon
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Quote:
Originally Posted by Thingfish
The stock gauge reads in MPa,Mega Pascals. .05Mpa = 7.25psi , .1 = 14.5 psi. Stock boost should max at 13.5psi, just under .1 Mpa.
Yes it is normal for a stock turbo car to taper boost at higher rpm.
Thanks for the info... exactly what I needed to know!
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Old 08-27-2005, 09:57 PM   #7
mrjasey
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i find that my boost guage gives me skills in magic
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Old 08-27-2005, 10:05 PM   #8
r0nzar
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Mine hits about .08 to .09 mpa like yours, all is well. If you google search a conversion table you can find some useful mpa to psi to bar to whatever tables
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Old 08-28-2005, 12:06 PM   #9
pir800
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it looks right
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Old 08-28-2005, 12:16 PM   #10
mblank
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I think the oem ecu won't allow full boost on wot in the lower gears. Can someone else confirm this too...
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Old 08-28-2005, 12:27 PM   #11
attitude
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not enough load on the motor to boost in lower gears. go drive up a steep hill in lower gears, and watch your gauge
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Old 08-28-2005, 12:33 PM   #12
supermarkus
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Old 08-28-2005, 01:58 PM   #13
OrlandoSTi
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Quote:
Originally Posted by Hayes
Why the bleep Subaru does'nt offer a gauge that reads in PSIG for the American market is a joke. I suppose it make for a good discussion at the coffee table. Their own manuals talk about boost in psi so what's with thir guages. Dumb Dumb Dumb.
Well, because the Impreza is a true Japanese car and it comes from Japan, where the Japanese read their gauges in MPa.... Actually, most everyone, but America...... It takes all of one minute to figure out how to read the gauge, ya know.....
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