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Old 05-18-2010, 05:46 PM   #51
LittleBlueGT
Scooby Specialist
 
Member#: 96204
Join Date: Sep 2005
Chapter/Region: W. Canada
Location: Winnipeg
Vehicle:
2013 STI GR
White

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Quote:
Originally Posted by Equilibrium Tuning View Post
Even if the wastegate spring is 15psi, a boost controller will get you to that 15psi significantly faster than just the wastegate on its own. Wastegates open progressively, so as you hit 5psi, it opens a bit, 10psi, it opens more, 15psi, it opens more and stabilizes boost. With a good boost controller, the wastegate doesn't see any boost until it gets very close to its target. This allows the wastegate to stay closed much longer and greatly improves spoolup.

-- Ed
I will give you the progressive part, but the 6 Waste gates that I have played with were not quite as progressive as you say.

My 15 psi IWG would start to open at about 13 psi (depending on pre-load).

My 1.0 bar (q14.7 psi) Tial EWG starts to open pretty close to 12 or 13 as well.

This is verified by a hand-held boost pump, and logging.

If there was 0 pre-load on the spring, then yes I agree, but that is not the case.
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Old 04-23-2013, 07:23 PM   #52
Vanderkitten
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Member#: 218648
Join Date: Jul 2009
Chapter/Region: BAIC
Location: Berkeley, Ca
Vehicle:
2009 WRX
Spark Silver

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Old school thread redux- great for putting a visual on the gains for the 10cm housing... looks like it would be very happy with an 8000rpm redline.
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