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Old 12-17-2008, 09:07 AM   #1
cribbie
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Location: Ontario
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2003 WRX
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Default Subaru Cylinder Head Info+ Specs

Hello, does anyone know if there is a link on NASIOC or anywhere else that states all of Subaru's cylinder head specs? ie: combustion chamber, and valve sizes etc etc?
I am more interested in the specs for Turbo application heads like:
WRX
STi: if they changed anything from year to year
Leggy Turbo phase 1 (ej22t)


Thanks for your help!

Cheers..
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Old 12-17-2008, 02:11 PM   #2
Maxwell Power
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That's really a lot of data.
If you tell us exactly what you are trying to figure out, we could probably point you in the right direction.
For starters, give us a range of years and a displacement or casting number.
For example, the STi in the USA is 2.5L and therefore would not be the same as a JDM STi.

Here's some data:
B25 casting (04-06 USDM STi) 36mm intake, 32mm exhaust 57cc chamber.
D25 casting (06-07 USDM WRX) 36mm intake, 32mm exhaust 50cc chamber.
S20 casting (02-05 USDM WRX) 36mm intake, 32mm exhaust 49.5cc chamber.


You can see that the displacement for the engine is in the casting number:
D25 = 2.5L
S20 = 2.0L
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Old 12-17-2008, 07:02 PM   #3
cribbie
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Thanks for that info....


Specifically I am looking for:
USDM STi specs ( 04- current)
USDM WRX specs (02-05)
JDM STI 2.0L spec
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Old 12-17-2008, 07:46 PM   #4
Rasmusson14
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Quote:
Originally Posted by cribbie View Post
Thanks for that info....


Specifically I am looking for:
USDM STi specs ( 04- current)
USDM WRX specs (02-05)
JDM STI 2.0L spec
I too would like this info. But I do know that there was a change during the V7/V8 change over. The Spec C V7 Heads were "big ports" while the rest of the V7's were the ?same? (I think) as the current WRX casting. Where all Ver. 8 heads are "Big Port" but I have no idea if there was any change in the chamber volume or valves used.
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Old 12-17-2008, 09:16 PM   #5
cribbie
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I will try to use my "telekinesis" powers to call on Maxwell Propulsion to answer this question!!!!
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Old 12-17-2008, 09:27 PM   #6
mick_the_ginge
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Quote:
Originally Posted by cribbie View Post
I will try to use my "telekinesis" powers to call on Maxwell Propulsion to answer this question!!!!
A "search" works just as well, these should help.

Old posts from the "sponaugle"

WRX/STI/JDM Head specs
http://forums.nasioc.com/forums/showthread.php?t=630797

07 head info
http://forums.nasioc.com/forums/show....php?t=1413998

I also found these:

Stock Cam spec's

http://forums.nasioc.com/forums/showthread.php?t=419230

And my personal favorite and nothing to do with the OP's question:

"Boohaahaa - Now that, my friends ,is a turbo! " from 2004

http://forums.nasioc.com/forums/showthread.php?t=674602

Jeff Sponaugle has always been infront of the curve
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Old 08-14-2011, 01:51 PM   #7
ddrule5
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how much can i mill off a 2006 2.5 v25 head?
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