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Old 01-21-2003, 03:04 PM   #1
Turbo GC4
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Member#: 28555
Join Date: Nov 2002
Default Whose boosting an EJ22 NA?

Got a 98 Impreza w/ an EJ22 NA with plans of adding Subachad's up/down pipes and a TDO4.

Instead of a motorswap I think im going to get my cylinders overbored and then use overbored EJ22t Pistons then getting the block o-ringed. Anyone hear of this or a similiar setup?

I think it will be cheaper and about as effective as a whole ej22t swap.
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Old 01-21-2003, 09:32 PM   #2
Scooby Specialist
Member#: 2213
Join Date: Aug 2000
Chapter/Region: NESIC
Location: Raymond, NH USA
1995 Impreza w/EJ255
Brilliant Red

Default Leave alone

I am boosting on a stock engine and so are a few others. I would suggest that you leave it stock and boost that for awhile. If you blow the headgasket or something then open it up. But the main thing this engine needs in new heads. The single exhaust port for each head is brutial for high flow up top and would be the first place I would spend my money if modifying the stock engine.
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Old 01-22-2003, 02:09 PM   #3
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Location: Cedar Rapids, Iowa
1997 Impreza Wagon
Mystic Blue Pearl



Could you elaborate on what makes you feel that the single port heads flow so poorly (other than that everyone says so)? I've never seen any flow tests on these heads. Also, what type of turbo setup are you running?

FWIW, in NA form my '97 2.2 pulls to redline quite well.


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Old 01-22-2003, 02:36 PM   #4
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Location: The Windy City
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Housework for Summer


Not sure if the head's themselves flow poorly on the 2.2L but I do know that the casting tolerences left little to be desired. I've found less than perfect holes and casting imperfections when I took off my exhaust manifold. I port matched the two by grinding some metal off the head and also grinding the thick lip that protrudes from the exhaust manifold.


But I do agree with Josh and think that you should just use your 2.2L first and see what it can do until it breaks then go ahead and rebuild it properly.
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Old 09-10-2014, 09:46 AM   #5
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Old 09-11-2014, 05:07 PM   #6
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Location: Pittsburgh PA
98 Forester S/t
all the mods!


I am, but a phase one with low compression and better heads. Little different animal. I call it my junkyard build. My clutch cost more than the hole rest of the build.
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