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07-29-2013, 10:05 PM | #1 |
Scooby Newbie
Member#: 301606
Join Date: Nov 2011
Chapter/Region:
MWSOC
Location: Pinckney, MI
Vehicle:2002 WRX WRB |
ej253 heads on phase 2 ej22
anyone know if this will work? got a 99 legacy 2.2 that needs new heads. just wondering if its an easy bolt up and go. id obviously need dual port headers but i can get those easy.
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07-29-2013, 11:07 PM | #2 |
Scooby Specialist
Member#: 294461
Join Date: Sep 2011
Chapter/Region:
NWIC
Location: Grass Pants, OR
Vehicle:2006 San Remo Wagon Under construction |
Intake manifold won't bolt up as far as I know.
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07-29-2013, 11:10 PM | #3 |
Scooby Newbie
Member#: 301606
Join Date: Nov 2011
Chapter/Region:
MWSOC
Location: Pinckney, MI
Vehicle:2002 WRX WRB |
i thought they were both phase 2 motors so that intake mani was the same?
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07-29-2013, 11:17 PM | #4 | |
Scooby Specialist
Member#: 294461
Join Date: Sep 2011
Chapter/Region:
NWIC
Location: Grass Pants, OR
Vehicle:2006 San Remo Wagon Under construction |
Quote:
You may be right. So in that case, you'll lose a bit of compression, but will gain head flow. |
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07-30-2013, 01:12 AM | #5 |
Scooby Specialist
Member#: 216984
Join Date: Jul 2009
Chapter/Region:
NWIC
Location: Coeur D Alene, ID
Vehicle:1996 Impreza outback Green |
The only 2.5 NA head that you can put on a 2.2 block is the ej25D head from the 97-98 legacy gt, 98 rs, and 98 forester. This is because of the clover leaf pattern in the combustion chamber of the heads and how it actually measures 97mm across which is what the 2.2 bore is.
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07-30-2013, 03:01 PM | #6 |
Scooby Newbie
Member#: 301606
Join Date: Nov 2011
Chapter/Region:
MWSOC
Location: Pinckney, MI
Vehicle:2002 WRX WRB |
I've seen some people running ej253 blocks with phase 2 ej22 heads. I've got a 99 legacy 2.2 and I need heads baaaad.
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07-30-2013, 07:49 PM | #7 | |
Scooby Specialist
Member#: 216984
Join Date: Jul 2009
Chapter/Region:
NWIC
Location: Coeur D Alene, ID
Vehicle:1996 Impreza outback Green |
Quote:
So, 3 choices: 1. Find phase 2 2.2 heads, 2. Find another phase 2 2.2 long block and swap it in, 3. Find a 2.5 block phase 2, then find the phase 2 2.2 heads and put them on the block for a higher compression franken motor. Since your car has a phase 2 engine, you won't be able to put the phase 1 2.5 heads on your current 2.2 block because of the wiring and such. What happened to your current heads? ~Josh |
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07-31-2013, 09:32 AM | #8 |
Scooby Newbie
Member#: 301606
Join Date: Nov 2011
Chapter/Region:
MWSOC
Location: Pinckney, MI
Vehicle:2002 WRX WRB |
well i bent the valves on one side of my motor due to a bad timing belt. bought the car this way not to my knowledge. thought it was just in need of a tune up because it drove fine.
i know the combustion chamber will be too big thus lowering the compression ratio but im just wondering if i can run those heads on there with a stock gasket and be fine because id like to have dual port exhaust and i have plans to turbo the car and i hear the lower compression ratio makes it better for Forced induction. i keep hearing mixed opinions on what will fit and what wont. just trying to clear it up. |
08-01-2013, 03:04 AM | #9 | |
Scooby Specialist
Member#: 216984
Join Date: Jul 2009
Chapter/Region:
NWIC
Location: Coeur D Alene, ID
Vehicle:1996 Impreza outback Green |
Quote:
Since you want to do a turbo, the only thing I can think of is finding a used good condition sti shortblock and putting the phase 2 2.5 NA heads on that block with the stock 0.040 head gasket. Should be no higher than 9.0:1 but most likely a bit lower than that. I would double check on the stock phase 2 2.2 head gasket thickness though as I am not sure if it is the same as the phase 2 NA 2.5 stuff. ~Josh |
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05-02-2019, 09:52 PM | #10 |
Scooby Newbie
Member#: 498802
Join Date: Mar 2019
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Old thread but, for whoever still read this ej222-3/ej251-3 all heads have 50cc combustion Chambers. Compression ratios won't increase or decrease. I'm not sure if the difference in bores is an actual problem, I haven't looked into it past seeing people say no while other actually do it. But cr's wouldn't change short of dished pistons/different gaskets.
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