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Old 11-28-2012, 04:27 PM   #662
Scooby Specialist
Member#: 73932
Join Date: Nov 2004
Chapter/Region: RMIC
Location: Denver
2005 STi BROtuned
2004 S2000


Originally Posted by Phatron View Post
I'm not fully understanding how it causes an overboost.
When you command 100% WGDC, the boost has two places to go, the WG or the inlet. Given the inlet is adding vacuum, it wins. Therefore, you have a lack of pressure on the WG diaphragm to open it up.

Originally Posted by Phatron View Post
If you hook the setup up, then start at wg pressure, then start tightening the mbc and stop when you get to the desired boost pressure....when does the overboost start?
With 100% WGDC, overboost is big and instant. It really doesn't matter what your MBC is set at.

Originally Posted by Phatron View Post
i've had mine hooked up with that port going to the inlet, with that port on the ebcs open to atm, and with that port plugged and didnt notice any differences. However, I didnt do them all back to back as a test
A little over a year ago, I tested all the routes depicted here. The best and most reliable, not to mention the only one that will actually CAP your max boost in the event of a EBCS failure or tuning issue, is the diagram that Grimmspeed posted.

For those that have it in the intake, what is your WOT WGDC (as well as the maxium post compensation)? Is the MBC truly controlling your WOT boost, or is it the EBCS?
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yamahaSHO is offline   Reply With Quote