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These are the factory pre-tensioned wastegate settings. What 20G are you running. According to the 20Gs that Blouch uses they are both pre-tensioned to 9PSI. So if the table I found is correct, one from an 04-07 STI, or maybe an 02-03 WRX might work. But not sure, and not sure if the table is helpful or not either.
2007 STi WGDC Tables
Stock restrictor pill size = ~.0335”
Factory wastegate pre-tensioned to ~9psi
2004-2006 STi WGDC Tables
Stock restrictor pill size = ~.043”
Factory wastegate pre-tensioned to ~10psi
2007 WRX WGDC Tables
Stock restrictor pill size = ~.028”
Factory wastegate pre-tensioned to ~6psi
2004-2005 WRX WGDC Tables
Stock restrictor pill size = ~.047”
Factory wastegate pre-tensioned to ~6psi
2002-2003 WRX WGDC Tables
Stock restrictor pill size = ~.047”
Factory wastegate pre-tensioned to ~10psi
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Joshua
"2007 WRX-20G- Tim Bailey tuned 326 HP 319 ft/lbs
Stage 2 2005 WRX
Cobbtuning.com"
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