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Old 05-26-2003, 04:22 PM   #1
mRgUnN
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Join Date: Jan 2002
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2003 Impreza WRX
WR Pearl Blue

Default How to read the stock turbo boost gauge?

Dear Subie Pals:

I have done several searches of this forum and on the internet at large. No where could I find a simple FAQ on how to read the stock Subaru WRX gauges, turbo, oil Temp etc. In this case in particular, I want to know if I am getting the optimal performance from my WRX sedan's turbo.

So my question is: How do I read the stock Turbo boost gauge, and convert that number to Pounds Squar Inch or PSI? Is there an FAQ that explains all of this that I missed?

Note, the stock gauge reads as follows:
- .1
- .05
0
+.05
+.1
+.15

I rarely if ever see any result above +.09, I have seen it peak out at about +.11 but only for a split second, is this correct for a car that is all stock except for the Boost solinoid mod?

Thanks,

mRgUnN



PS If the Mods see this and it is not in a n00b FAQ section I missed, it might be a good idea to put this question in a FAQ.
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Old 05-26-2003, 04:56 PM   #2
DrD
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Your gauge reads in MPa - to convert to psi, multiply by145.04, so 0.09 MPa is around 13psi, which is close to the max boost of 13.5psi for a WRX. It is pretty normal to see a little bit of a boost spike on hard acceleration.
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Old 05-26-2003, 05:49 PM   #3
gjhsu
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Boost also depends on the climate and weather you are experiencing. In optimal weather, I often see readings of .1MPa out of my stock WRX, which is ~14.5psi. Not bad, if you ask me

DrD hit it right on the nose.
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Old 05-26-2003, 11:03 PM   #4
krazedant
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Old 05-27-2003, 08:16 PM   #5
03WRXMA
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I have seen peaks as high as 1.07, is this normal at all?!
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Old 05-27-2003, 11:34 PM   #6
digitaltekniq
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On a stock WRX?
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Old 05-28-2003, 02:15 PM   #7
03WRXMA
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Quote:
Originally posted by digitaltekniq
On a stock WRX?
Yes sir!
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Old 05-29-2003, 01:16 AM   #8
crazy_sherm
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Quote:
Originally posted by 03WRXMA
I have seen peaks as high as 1.07, is this normal at all?!
I don't think my boost gauge goes up that high? wouldn't 1.07 mPa = 155.2 psi?
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Old 05-29-2003, 01:03 PM   #9
Lordhowe
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Quote:
Originally posted by crazy_sherm


I don't think my boost gauge goes up that high? wouldn't 1.07 mPa = 155.2 psi?
hahahaha that's alot of boost i think he means 0.107 which is 15.5, but still, that seems a little high for a complete rex
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Old 05-29-2003, 01:06 PM   #10
Lordhowe
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Quote:
Originally posted by Lordhowe


hahahaha that's alot of boost i think he means 0.107 which is 15.5, but still, that seems a little high for a complete rex
* complete STOCK rex, sorry i forgot a word
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Old 05-29-2003, 02:11 PM   #11
03WRXMA
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you guys are correct, damn decimal point
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Old 05-30-2003, 08:30 AM   #12
mRgUnN
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Default Thanks Every One!!!

Dear Subie Pals:

Thanks to everyone who took the time to reply, very helpful!

Regards,

mRgUnN

PS Mods any word on this making to the newbie FAQ?
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Old 05-31-2003, 06:07 AM   #13
xjohnx
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my friend has hit 1.09 peak on his bone stock rex, it's not a consistant thing, but it peaks there ever now and again.
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Old 05-31-2003, 12:30 PM   #14
gjhsu
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Boost spikes no son bueno. I think the ECU retards timing or cuts off fuel if boost gets to a certain level. What is it, around 18psi?
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