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Old 24-01-2015, 11:17 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 07:24 PM.
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Old 24-01-2015, 12:21 PM
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I thought they are, who is telling you otherwise?
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Old 24-01-2015, 03:56 PM
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if it's an EJ207 it has forgies.
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Old 24-01-2015, 04:52 PM
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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, 08:54 PM
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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, 09:11 PM
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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, 09:23 PM
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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 09:32 PM.
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Old 25-01-2015, 08:55 AM
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Quote:
Originally Posted by dnbosiris View Post
Definitely an ej207,the engine code is ej207dw5cr. From a v8 MY03 STi. According to NASIOC it has cast hypereuthectic pistons: EJ207 Info - NASIOC
Have you had a piston out of your motor to check?

I'd take nasioc's info with a pinch of salt.

MRT say that My00 - MY06 all have forgies.
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Old 25-01-2015, 01:44 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.
Pretty sure my old 204 didn't have forgies, I have the pistons here and there is no HF-3 or HF-4 markings on them.

I'll post a pic a bit later.
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Old 24-01-2015, 07:24 PM
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strubaru?
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