General question - minimum boost vs. WG spring rate - Subaru WRX Forum
 
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post #1 of 5 Old 12-22-2013, 01:36 PM Thread Starter
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General question - minimum boost vs. WG spring rate

Hey foIks,

I posted this on the Forester forum and got no reply.

I have a TD04 on my EDM 2001 S-Turbo. Car runs great with Pipercross filter and decat.
I recently installed a GFB G-Force II boost controller (just hooked it up as a boost gauge, not connected to the WG yet). While reading the boost I noticed that it's still on the stock 0.55 bar, and I'm wondering how is this possible. I thought that the minimum boost you can get is the WG spring rate, which is supposed to be higher than 0.55 on the TD04, no?
So how does the ECU and the stock BCS manage to get the boost the same as it was with the original TF035?

Any thoughts?

Thx


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post #2 of 5 Old 12-22-2013, 04:19 PM
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.55 is almost 9 psi to those of you that are lost.
That's right around the pressure your wastegate opens up at.

..... I think. Damnit I'm a body guy! One of you old heads jump In here!!!!!

Randy-
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2004 Wrx-sold
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post #3 of 5 Old 12-22-2013, 05:48 PM
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Convert bar to psi - Conversion of Measurement Units

Looks like 8psi. Have you done a boost leak test? Where did you run the lines?

Paul
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2007 STi totaled
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post #4 of 5 Old 12-22-2013, 08:33 PM
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You're correct sir. Almost eight, not nine.
Math isn't my better subject

My old bug only read in bar.
It's been a while

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post #5 of 5 Old 12-23-2013, 12:36 AM Thread Starter
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No boost leaks to be found.

It's probably an 8psi spring then...

Thx folks


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