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Old 05-14-2014, 10:36 AM   #1
AtomicBazooka
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Member#: 390337
Join Date: May 2014
Chapter/Region: South East
Location: Durham NC
Vehicle:
2015 WRX
Black

Default 2015 WRX Turbo Question

I recently bought a 2015 WRX and noticed the turbo was very surgey at lower rpms. After research.. the term "Twin Scroll" came up. Interesting.
Plenty of literature on twin scrolls.. but the article that resonated with me was: http://www.modified.com/tech/modp-09...system-design/

Which reminded me about the old 911 turbo that was amazing.. similar idea to reduce turbo lag. The variable geometry turbo.
http://paultan.org/2006/08/16/how-do...geometry-work/

Does anyone have any insight why Subie goes with twin scroll over variable geometry? Cost? I'm curious.
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Old 08-29-2014, 02:49 AM   #2
sub06tr
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Member#: 233124
Join Date: Dec 2009
Location: El Paso TX
Vehicle:
2006 WRX TR
Blue

Default

Going to guess that with a 2.0 there would be more lag with variable.

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Old 08-31-2014, 07:50 PM   #3
pjc1976
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Join Date: Aug 2011
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Location: Tampa, FL
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2015 WRX/STi
DGM

Default

That's why I bought the '15 STi.

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