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Old 06-08-2009, 10:47 PM   #201
charliew
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fuji how come this is in the conversion thread? I like your head story but I thought it was in the built motor thread?
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Last edited by charliew; 06-14-2010 at 03:57 PM.
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Old 06-09-2009, 12:46 AM   #202
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Requesting a pic comparison: V8 Spec C compared to a USDM EJ205. If it's even possible. If not, no worries.
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Old 06-10-2009, 12:03 AM   #203
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Quote:
Originally Posted by Kostamojen View Post
Just for laughs, i've got a good "Head port comparison" for you guys...

Its some EJ25 N/A heads vs. EA61 heads (from a 1971 Subaru FF-1, the first boxer motor sold in the U.S... 1.1l displacement )



VW used boxers before that in the bug.
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Old 06-10-2009, 12:42 AM   #204
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Quote:
Originally Posted by subieguy87 View Post
VW used boxers before that in the bug.
Were they available in the US?
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Old 06-10-2009, 09:01 AM   #205
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^^yes they were. However I think he meant first subaru boxer.
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Old 06-11-2009, 01:46 AM   #206
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Quote:
Originally Posted by charliew View Post
fuji how cum this is in the conversion thread? I like your head story but I thought it was in the built motor thread?
this was started here. i wished it'd be moved over and possibly stickied.

the STi heads I'm porting are done and thats the Double-D thread. Very interesting finds because I have all these heads on hand or accessible.
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Old 06-16-2009, 10:29 AM   #207
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Quote:
Originally Posted by Chi_San View Post
Requesting a pic comparison: V8 Spec C compared to a USDM EJ205. If it's even possible. If not, no worries.
The V8 Spec C are not any bigger than the Big Ports them selves. Have the Spec C heads measured via CNC machine and you can port the USDM EJ205 heads just like them.
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Old 06-16-2009, 03:22 PM   #208
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Quote:
Originally Posted by FuJi K View Post
The V8 Spec C are not any bigger than the Big Ports them selves. Have the Spec C heads measured via CNC machine and you can port the USDM EJ205 heads just like them.
I'm debating between EJ205 heads ported, or EJ207 V8 Spec C heads. This would be on an EJ207 shortblock. If I can find an EJ207 V8 Spec C longblock, then I'm going to jump on that. AVCS > EJ205. Depends on if the I&M ODBII machines in the Southern Oregon area can read the JDM ECU, and if they can't if I can do sniffer test instead. If that's a no-no, then I'll be limited to running EJ207 bottom with EJ205 ported heads on top anyway.

Having the EJ207 longblock would be nice, since i'm going to be getting an 2.5RS for a daily while my WRX is down. Once the WRX has a new engine, transmission, driveshafts, hubs, brakes, suspension, etc., everything leftover from the WRX will be going onto the 2.5RS.
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Old 08-30-2009, 08:36 PM   #209
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stock eg33 heads for visual reference/ comparison



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Old 08-31-2009, 01:28 AM   #210
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now that's interesting. Sharing the phase1 EJ22E intake port inlet shape with EJ20 runner route and combustion chamber
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Old 02-17-2010, 06:34 PM   #211
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have you guys seen enough?????


GRB Dual AVCS. Runs the newer casting. I can see a similarity on my '06 WRX heads as well.
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Old 06-10-2010, 12:52 PM   #212
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B25 exhaust


S20/S20V/W20/D25/V25B/W25




Updated exhaust port listing^^^^^

Last edited by FuJi K; 05-14-2011 at 10:19 AM.
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Old 05-14-2011, 10:20 AM   #213
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^^^^^
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Old 05-15-2011, 06:49 PM   #214
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Sticky this!
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Old 05-29-2011, 01:49 PM   #215
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JDM 2006 Legacy GT heads, EJ20Y 2L motor, Quad AVCS







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Old 05-30-2011, 11:17 AM   #216
FuJi K
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ah hA! I've seen that intake port before. Subaru still uses that on the '06 Leggy in Japan eh.. the arch from the inlet to the valve follows the big ports on that style port. Thanks for the pics!
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Old 05-30-2011, 12:09 PM   #217
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No probs, any suggestions on improving them would be appreciated. I'll be pulling it apart in the coming weeks, trying to measure the combustion chamber, going oversize valves and a stroker blah blah. May as well clean the heads up if I can while I'm there
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Old 05-31-2011, 01:22 AM   #218
FuJi K
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you can shape them to look very close to the big ports.
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Old 06-13-2011, 11:39 AM   #219
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Any more pics / info on the W25 head? I might have found a set, curious to see what the ports are like.
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Old 10-04-2011, 11:43 PM   #220
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do you have any pictures about ej204 legacy jdm heads?
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Old 10-05-2011, 10:25 AM   #221
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Quote:
Originally Posted by retsej View Post
JDM 2006 Legacy GT heads, EJ20Y 2L motor, Quad AVCS

I have a set of 2.0L dual AVCS heads sititng in my living room (don't ask )

I however am wondering if the combustion chamber is the same. Mine cam with ports already plugged for what looks like direct injection.

I also have one of your pistons So did you want to get a forged set made or...?
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Old 10-11-2011, 11:13 AM   #222
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heres some eg33 shots i have
this is the exhaust ports ported vrs ported the green circle on the right port is the size of the stock exhaust gasket


heres stock intake port


here s a partially ported intake port
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Old 04-09-2012, 12:31 PM   #223
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...and subscribed!!!
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Old 06-18-2012, 08:53 AM   #224
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.... also subscribing
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Old 03-16-2013, 10:54 PM   #225
FuJi K
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I thought this was interesting. So we got a Forester engine. We as in U.S.A.

JDM SG9 EJ255 with B25 heads

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