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Old 24-01-2015, 10:17 AM
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Default Quick question: Did all my02 stis come with fully forged pistons from factory?

This one has been bugging me for a while because i seem to be getting different answers from forums and mechanics.

Could anyone shed some light?

And why would subaru do this to my02 stis but go with semi-forged in the later models?

Last edited by mercury888; 24-01-2015 at 06:24 PM.
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Old 24-01-2015, 11:21 AM
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I thought they are, who is telling you otherwise?
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Old 24-01-2015, 02:56 PM
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if it's an EJ207 it has forgies.
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Old 24-01-2015, 03:52 PM
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Quote:
Originally Posted by Rossco View Post
if it's an EJ207 it has forgies.
unless your name is strubaru
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Old 24-01-2015, 06:24 PM
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strubaru?
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Old 24-01-2015, 06:53 PM
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also any idea why Subaru stopped at my02 sti and made the later models semi-forged only?
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Old 24-01-2015, 07:00 PM
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Cold start emissions controls and regulations.
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Old 24-01-2015, 07:54 PM
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Quote:
Originally Posted by Rossco View Post
if it's an EJ207 it has forgies.
Strictly speaking that is ADM only right? As my ej207 is from a jdm my03 and i'm fairly certain it has hyper eutectic pistons.
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Old 24-01-2015, 08:11 PM
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Quote:
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Strictly speaking that is ADM only right? As my ej207 is from a jdm my03 and i'm fairly certain it has hyper eutectic pistons.
All International/JDM Ej207's from my99/00 Version 6 STI onward have either HF-3 or HF-4 oem forgies, version 5 and earlier had to be optioned for them.

If yours has cast pistons you have an EJ205.
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Old 24-01-2015, 08:23 PM
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Quote:
Originally Posted by Rossco View Post
All International/JDM Ej207's from my99/00 Version 6 STI onward have either HF-3 or HF-4 oem forgies, version 5 and earlier had to be optioned for them.

If yours has cast pistons you have an EJ205.
Definitely an ej207,the engine code is ej207dw5cr. From a v8 MY03 STi. According to NASIOC it has cast hypereuthectic pistons: http://forums.nasioc.com/forums/show....php?t=2385141

Last edited by dnbosiris; 24-01-2015 at 08:32 PM.
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