wastegate actuator question - Subaru WRX Forum
 
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#1 Old 10-28-2009, 07:08 PM
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wastegate actuator question

I am about to drop in my ej255 and the wastegate actuator on my 20g keeps getting stuck so I need to replace. I am running low on cash and the ej255 i just bought comes with the stock turbo.

my question is can the stock td04 wastegate actuator work on my 20g until i can buy one from Forge?

Also does anyone know the stock psi rating for the stock td04 turbo? Thanks.
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#2 Old 10-28-2009, 08:07 PM
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11.6 p.s.i. is the stock boost rating on my 06 wrx if that helps any. As far as the wastegate actuator I dont know.

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#3 Old 10-29-2009, 02:45 AM
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Quote:
Originally Posted by boo-key bear View Post
11.6 p.s.i. is the stock boost rating .
I believe a stock wrx should be somewhere around 13.5psi.
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#4 Old 10-30-2009, 09:08 AM
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ok so thats cool for now.

so no one knows if that wastegate actuator would work on my td05 20g?
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#5 Old 10-30-2009, 07:51 PM
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Quote:
Originally Posted by midniteblack View Post
I believe a stock wrx should be somewhere around 13.5psi.
2006-2007 (stock)
WRX: 11.6 P.S.I. WRX STI: 14.5

I am not sure if it is the same for other years.

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#6 Old 10-30-2009, 08:00 PM
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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

Joshua
"2007 WRX- PPG'd, 20G- Tim Bailey tuned
Stage 2 2005 WRX
Cobbtuning.com"
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#7 Old 10-31-2009, 04:30 AM
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Quote:
Originally Posted by boo-key bear View Post
2006-2007 (stock)
WRX: 11.6 P.S.I. WRX STI: 14.5

I am not sure if it is the same for other years.
It's different for different years. the op's car (04') runs 13.5 psi as well as the rest of the usdm 2.0 wrx's. The 06-07 is 11.6, 08' is 11.9 and 09+ is 13.3. So i've heard from my sources
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#8 Old 11-02-2009, 09:00 PM
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Quote:
Originally Posted by brouib View Post
ok so thats cool for now.

so no one knows if that wastegate actuator would work on my td05 20g?
Pretty sure it will not work due to the bolt holes are different.

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