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Old 11-28-2012, 10:52 AM   #656
yamahaSHO
Scooby Specialist
 
Member#: 73932
Join Date: Nov 2004
Chapter/Region: MWSOC
Location: Nebraska
Vehicle:
2005 STi - E85 20G'd
2004 S2000 - E85

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Quote:
Originally Posted by MRF582 View Post

If you want to open the wastegate more, you reduce WGDC which diverts less to the inlet and more to the WG. Otherwise the pressure gets diverted to the inlet pre-compressor and whatever slight pressure loss you have post compressor, translates to a pressure gain pre-comrpessor. Running it to the 'inlet' really is the most optimal way. Period.

If you lower the WGDC, it will open the port more directly to the WG diaphragm via the EBCS. 100% WGDC should put the MBC solely in the loop for boost control.

WGDC:

0% = Spring pressure
100% = MBC
1-99% = Boost control anywhere between spring pressure and MBC.

It works.

The only optimal way I've found after countless cars is the way Grimmspeed recommends. Using the inlet caused overboosting as I was essentially using the inlet vacuum to lower the pressure on the line needed for opening the WG.
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