ej22 convert to dohc

calvin6199 · Post by **calvin6199** » Sat Nov 14, 2009 6:34 am

i have a ej22 motor i am wanting to build should i go with a ej25 sohc head or dohc head also i am plaining on puting a turbo on it. I need to know what head gaskets to use and if the pistons have to be changed.Ii dont know much about the subaru's but have built several vw beetle motors i plain on putting this motor in my beetle too

wtdash · Post by **wtdash** » Sat Nov 14, 2009 5:35 pm

Welcome to the board.

Please do some searching- all your questions are addressed on here.

Get educated and come back w/specific questions.

I Guarantee You it'll make the answers more meaningful w/a frame of reference.

Td

calvin6199 · Post by **calvin6199** » Sun Nov 15, 2009 8:06 am

I have decided I am going to use the ej25 sohc heads. What head gasket do I need to use also will the stock intake fit those heads.

mike-tracy · Post by **mike-tracy** » Sun Nov 15, 2009 8:32 am

Did a little searching in these forums, I found this:

555BCTurbo wrote:Always use head gaskets that match the block

in this forum:

http://bbs.legacycentral.org/posting.ph ... e&p=274337

Also, the DOHC vs SOHC thread:

http://bbs.legacycentral.org/viewtopic. ... light=sohc

Basically what I got from that is the 2.5 SOHC and 2.5 DOHC heads are good for different reasons, but the 2.5 SOHC models are "phase II" heads, and the coolant passages don't line up with "phase I" blocks, and

93forestpearl wrote: The DOHC EJ25D heads use a phase I design and trigger signal, and flow better to boot.

(from that same thread).

Regarding your question about whether your phase 1 SOHC intake manifold would fit phase 2 SOHC heads, I would imagine they wouldn't but I haven't tried that combination. Let us know

PhyrraM · Post by **PhyrraM** » Sun Nov 15, 2009 4:59 pm

Very quickly, because there is everything you need to know documented already.......

You cannot use your EJ22T intake manifold. You must use a manifold to match the heads you choose.

Phase 2 SOHC heads will not work with a stock up-pipe because they hit each other. The "corner" of factory turbo heads, and derivitives, is cut out for up-pipe clearance.

calvin6199 · Post by **calvin6199** » Sun Nov 15, 2009 5:50 pm

I have read a lot on this forum but I have a ej22e not the ej22t so there is not as much for it listed also I saw in one thread that the intakes for the phase 1 heads all interchange I did not relise the ej25 sohc head was phase 2. I am trying to get out the easiest way posible the dohc head swap seamed like I had to change more and like coolant line timing belt covers tensioners ect.

Thanks for the info I am still reading about it also

jdmleggy97 · Post by **jdmleggy97** » Tue Nov 17, 2009 5:48 pm

there is plenty for the ej22e as every phase 1 engine is the same. The only diffrence with ej22t and E is turbo pistons,closed deck block,pistion squirters,oil pump,water pump but every things is pretty much the same. Just like phase 2

calvin6199 · Post by **calvin6199** » Wed Nov 18, 2009 11:56 pm

So are the heads the same on ej22e and the ej22t or is the cam and rockers differant. And are the compresion chamber the same

jdmleggy97 · Post by **jdmleggy97** » Thu Nov 19, 2009 12:11 am

exactly! Bore size is the same! Meaning you can use turbo pistons to drop the compression ratio if u wanted. Turbo crank and rods are the same as any other ej series engine so don't worry about that.

wtdash · Post by **wtdash** » Thu Nov 19, 2009 12:15 am

Delta Camshafts said the cams are different?

93forestpearl · Post by **93forestpearl** » Thu Nov 19, 2009 12:32 am

Cams are different in the turbo heads. Turbo cams run significantly less overlap compared to a N/A cam.

calvin6199 · Post by **calvin6199** » Thu Nov 19, 2009 1:24 am

Also just remembered the heads on the ej22t are dual port and the ej22t are single port is there a big diferance in the flow. Can I put a turbo cams in my n/a heads

Aslo wanted to say thanks for all the info this forum realy knows what's going on. I have been on other sites and u ask a tech ? And they have no clue

Post by **Legacy777** » Thu Nov 19, 2009 2:51 am

Which ej22? The ones in the first gen legacy are dual port, just like the turbo heads.

Only the phase 2 ej22 has a single exhaust port per head.

calvin6199 · Post by **calvin6199** » Thu Nov 19, 2009 3:01 am

I got the motor out of a 98 impreza out back sport. It only has single port exhaust so it is a phase 2? There are to many different motors in the subarus haha

Post by **Legacy777** » Thu Nov 19, 2009 3:03 am

Yes, the ej22 in the 98 impreza is a phase 2.

calvin6199 · Post by **calvin6199** » Thu Nov 19, 2009 3:13 am

So can I put the turbo pistons in it out of the phase 1 also what would y'all recomend on heads

mike-tracy · Post by **mike-tracy** » Thu Nov 19, 2009 4:04 am

What are your goals for the motor?

calvin6199 · Post by **calvin6199** » Thu Nov 19, 2009 4:11 am

i want to turbo it and put it in my vw beetle would only wont to get around 200-250hp out of it. i want drive it to much but i am pretty rough on suff so want to be a reliable

wtdash · Post by **wtdash** » Thu Nov 19, 2009 6:04 am

To clarify (hopefully JC will forgive me).

Phase II EJ22e started in 1999:

Per wikipediaand cars101.com.

1999 2.2 Liter Phase 2 Engine Enhancements (from endwrench article H-4 and H-6 service): All 2.2 liter engine for 1999 are the Phase 2 design. The 2.2 liter Phase 2 engines are a SOHC design, with a newly-designed cylinder head.....

- EJ22e Phase I = 1990-1998 for USA.
- 1995 was last of the dual port exhaust EJ22e (and 1st year of OBDII for the Legacy)
- 1996 was the last year of the non-interference EJ22e; 1st year of the single-port.
- 1997-1998 EJ22e - interference and single-port, along w/internal and head upgrades (but still Phase 1).

calvin6199 · Post by **calvin6199** » Thu Nov 19, 2009 6:39 am

yeah i thought it was phase I. I was all confused for a little while. but i still have the singel port exhaust so would changing the heads to the ej22t be a good upgrade also seems easer to hook up the turbo sence it has the water and oil holes

jdmleggy97 · Post by **jdmleggy97** » Thu Nov 19, 2009 3:45 pm

definatley would be easier. and while your in there change the pistons and rings

Post by **Legacy777** » Thu Nov 19, 2009 6:56 pm

Damn phase 1, phase 2 crap. I always hated referring to things like that....just like all version blah blah blah blah

calvin6199 · Post by **calvin6199** » Fri Nov 20, 2009 4:23 am

alright i have decided to go with the ej22t heads and pistons but having a hard time finding the pistons.
also was reading on this forum and thought i saw that if the intake bolt holes lined up it was a phase I is this true if so mine is not phase one

PhyrraM · Post by **PhyrraM** » Fri Nov 20, 2009 5:37 am

calvin6199 wrote:......was reading on this forum and thought i saw that if the intake bolt holes lined up it was a phase I is this true if so mine is not phase one

That information refers only to DOHC heads. If the intake bolts line up on DOHC heads, they are phase 1.

IIRC, all SOHC heads have offset intake bolt patterns. Phase 1 and phase 2 are both offset, but not compatable with each other.

calvin6199 · Post by **calvin6199** » Fri Nov 20, 2009 5:54 am

thanks. well that aswers my questions. I going to run the ej22t heads and pistons.Probably fab up a header and run a turbo

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