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Old 04-03-2013, 09:07 PM   #13
Scooby Newbie
Member#: 193628
Join Date: Nov 2008
Chapter/Region: E. Canada
Location: Canada
2010 STI


Manual boost controller is not necessary. I had one on my 08 wrx just trying out stuff and there was no real benefit to having it.

Manual boost controller:
-Easy to set desired boost level
-Pretty cheap
-Easy to install

Benefits of using oem boost solenoid
-Better control for boost levels when weather changes
-If detonation is present from a bad tank of gas the ecu can reduce boost level and save the engine
-Can run different boost levels in different areas of map.
-Tuned properly can reduce lag.

My suggestion? Go with a 3 port boost solenoid. The gm boost solenoid works very well or even better is the grimmspeed boost solenoid. Very nice product and installs nicely.

The 3 port has way better control over boost than the restrictor pill bleed setup that subaru has stock and with proper tuning makes the turbo spool a lot sooner and will hold boost better into higher rpms.

A worthwhile upgrade in my opinion.
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Franko is offline   Reply With Quote