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Old 09-26-2005, 03:16 PM   #1
tonzo
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Subaru Stars EJ22 vs. EJ22T

What parts on the EJ22T are different than on the EJ22? I know the heads are different. lower compression. I also know the pistons are different. anything else? rods? throttle body? etc?
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Old 09-26-2005, 03:30 PM   #2
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T is closed deck, E is open...
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Old 09-26-2005, 03:32 PM   #3
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i knew that. thanks tho
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Old 09-26-2005, 09:48 PM   #4
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The EJ22T heads are virtually identicle to the early EJ22 heads. The cams are different and not much else.

The entire shortblock is different of course as mentioned.

The intake manifold is totally different as well.
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Old 09-26-2005, 10:36 PM   #5
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Are those really the only differences? Doing some research Tonzo for a swap?
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Old 09-26-2005, 11:50 PM   #6
tonzo
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yea i thought the fuel injectors were different and i thought maybe the throttle body but i wasn't sure. And yea, my plan so far is to rebuild my ej22 n/a for turbo.
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Old 09-27-2005, 12:29 AM   #7
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Quote:
Originally Posted by tonzo
yea i thought the fuel injectors were different and i thought maybe the throttle body but i wasn't sure. And yea, my plan so far is to rebuild my ej22 n/a for turbo.
I will be paying close attention to this, as I too am thinking of going the turbo route, just not right now. If you do this man, you have to document this for the rest of us ej22 owners. That would really be cool.
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Old 09-27-2005, 12:49 AM   #8
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yah if/when you get this project done put up a nice big thread about it. make sure you take lots of pics
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Old 09-27-2005, 12:50 AM   #9
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From what I have read about the EJ22T vs. the NA EJ22 heads is the valve are larger on the NA heads. The valves are smaller on the EJ22T to increase velocity.
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Old 09-27-2005, 01:39 AM   #10
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Quote:
Originally Posted by cjfike
From what I have read about the EJ22T vs. the NA EJ22 heads is the valve are larger on the NA heads. The valves are smaller on the EJ22T to increase velocity.
That would be odd. Perhaps the EJ22T is closer related to the EJ18 head then.
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Old 09-27-2005, 09:44 AM   #11
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the NA valves are larger to allow for better breathability
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Old 09-29-2005, 11:04 PM   #12
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The exhaust ports are indeed smaller. The TB is the same size. There are other subtle differences, higher pressure/flow oil pump, different water pump & line routing, different PCV system setup, oil squirters, internals are different, passenger side head has fittings for oil/water supply & oil return. Those are the main things.
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Old 09-30-2005, 08:09 AM   #13
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okay, I know the heads are set up to send oil to the turbo and back. now is my block capable of giving the head the oil it needs to get to the turbo? I know im going to have to make a few mods for the oil line. I was just wondering if i was going to have to change my block at all too.
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Old 09-30-2005, 01:36 PM   #14
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The oil supply for the turbo does not come from the block. It comes from the head as I previously mentioned.
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Old 09-30-2005, 02:12 PM   #15
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but there are turbos that don't need a coolant line correct? if so what kinds?
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Old 09-30-2005, 03:09 PM   #16
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Quote:
Originally Posted by Kostamojen
That would be odd. Perhaps the EJ22T is closer related to the EJ18 head then.
The Ej18, Ej22E and EJ22t heads all come from the same basic casting. The Ej18 has the smallest valves of the bunch, with the Ej22t next in line, and then the Ej22E. The difference from head to head is only 1/8"

The intake ports on an Ej18 are significantly smaller than either the Ej22E or T. And the Ej18 uses the roller rocker with HLA's valve actuation. The Ej22E and T both use a more direct rocker without roller. You can switch valve actuation from head to head as long as you use the cams from the particular design. I know all this because I measured it and test fit the stuff in my garage.

I don't think anyone mentioned that the Ej22T injectors are larger, but aren't large enough for much over 225chp.

Also, if you need a turbo oil pump, water pump, or any of those other turbo specific items (like the throttle body or a manifold) let me know. I have spares of all this stuff.

Lastly, many turbos out there require some sort of oil cooling, not just the factory IHI or Mitsu units. But fabricating something to work by tapping the oil pan with a return is something that has been done many times by folks.

Now let me throw a twist into this build. Instead of getting a set of USDM Ej22T pistons and throwing them in to change the CR, change your heads. Get a set of DOHC Ej25 or SOHC Ej25 heads to significantly increase your flow. Your CR would be 8.6:1 The Ej22 heads flow something like 180cfm, while the RS heads flow more like 240cfm. I've got a set of builder DOHC Ej25 heads and manifold that I would dump for super cheap to see this build happen. You would need to rebuild the heads and replace a few valves, but I am talking about $100 plus freight and they are yours...
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Old 09-30-2005, 03:48 PM   #17
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Quote:
Originally Posted by Matt Monson
The Ej18, Ej22E and EJ22t heads all come from the same basic casting. The Ej18 has the smallest valves of the bunch, with the Ej22t next in line, and then the Ej22E. The difference from head to head is only 1/8"

The intake ports on an Ej18 are significantly smaller than either the Ej22E or T. And the Ej18 uses the roller rocker with HLA's valve actuation. The Ej22E and T both use a more direct rocker without roller. You can switch valve actuation from head to head as long as you use the cams from the particular design. I know all this because I measured it and test fit the stuff in my garage.

I don't think anyone mentioned that the Ej22T injectors are larger, but aren't large enough for much over 225chp.

Also, if you need a turbo oil pump, water pump, or any of those other turbo specific items (like the throttle body or a manifold) let me know. I have spares of all this stuff.

Lastly, many turbos out there require some sort of oil cooling, not just the factory IHI or Mitsu units. But fabricating something to work by tapping the oil pan with a return is something that has been done many times by folks.

Now let me throw a twist into this build. Instead of getting a set of USDM Ej22T pistons and throwing them in to change the CR, change your heads. Get a set of DOHC Ej25 or SOHC Ej25 heads to significantly increase your flow. Your CR would be 8.6:1 The Ej22 heads flow something like 180cfm, while the RS heads flow more like 240cfm. I've got a set of builder DOHC Ej25 heads and manifold that I would dump for super cheap to see this build happen. You would need to rebuild the heads and replace a few valves, but I am talking about $100 plus freight and they are yours...
How much do you think a build like this would run, give or take a hundred or so.
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Old 09-30-2005, 06:56 PM   #18
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Which build? I list a couple there...
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Old 09-30-2005, 07:14 PM   #19
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Quote:
Originally Posted by Matt Monson
The Ej18, Ej22E and EJ22t heads all come from the same basic casting. The Ej18 has the smallest valves of the bunch, with the Ej22t next in line, and then the Ej22E. The difference from head to head is only 1/8"

The intake ports on an Ej18 are significantly smaller than either the Ej22E or T. And the Ej18 uses the roller rocker with HLA's valve actuation. The Ej22E and T both use a more direct rocker without roller. You can switch valve actuation from head to head as long as you use the cams from the particular design. I know all this because I measured it and test fit the stuff in my garage.
Thats interesting stuff...

Have you compaired a set of '97 EJ18 heads versus the rest? What about using EJ22 heads on the EJ18 block?
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Old 05-15-2011, 08:48 PM   #20
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.....

Last edited by Beauchemin; 02-21-2012 at 08:47 PM.
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Old 11-22-2011, 10:24 PM   #21
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i have a 98 subaru legacy with the 2.2 and i have a full 2.2t motor with 155k on the motor and going to start the swap soon and was wondering if anyone has any info on what to do for ecu and wiring. my wiring harness has all the same connectors except one and i want to keep the ob2 ecu and have it remapped instead of using the ob1 ecu or find a cheap piggyback ecu. i am getting the turbo cross member this week so the turbo piping will fit. so the only problem i need to work out before i start the swap is the wiring and ecu.
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