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Old 06-16-2003, 05:01 PM   #1
Scoobyslack1
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Question EJ22 turbo w/EJ20G heads?

ok, been reading alot of info on replacing the stock 2.2 turbo heads...unfortunately the info is reguarding 2.5L or 2.2L heads

has anyone used EJ20 heads (not from USDM motor) on their 2.2 turbo block?
which gasket to use?
compression ratio change?

thanks for any help
Alan
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Old 06-17-2003, 02:16 AM   #2
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I have always wondered if there is some hardcore proof of difference in flow through heads.

Subaru must have felt it sufficient to use Single port heads, and thus so do Chicksdigwagons and I. I personally feel that money is better spent elsewhere in your turbo project.

I am soon to turbo my EJ22 w/ SOHC Single Port heads... w/ EJ22t Block Internals, o-ringed. I will let you know what my results are. If it ends up being super low flowing, likely my major problem will be getting the turbo to spool. We'll see
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Old 06-17-2003, 07:58 AM   #3
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Quote:
Subaru must have felt it sufficient to use Single port heads, and thus so do Chicksdigwagons and I. I personally feel that money is better spent elsewhere in your turbo project.

I am soon to turbo my EJ22 w/ SOHC Single Port heads... w/ EJ22t Block Internals, o-ringed. I will let you know what my results are. If it ends up being super low flowing, likely my major problem will be getting the turbo to spool. We'll see
Obviously Subaru did it to save money. I've been told by a very good tuner that even the dual port is a half-baked solution, when there is an immediate s-curve right off one of the cylinders before it even gets to the exhaust manifold (where the y-pipe is also another compromise).

And I completely agree that money is better spent elsewhere to get power.

Good luck with your project. I'm curious to know if your heads will mate up with the block as poorly as mine did at first.
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Old 06-17-2003, 12:30 PM   #4
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ok........

this would also be going from SOHC to DOHC, I would be getting everything from the heads up, intake manifold, throttle body, fuel rails, STi injectors and cams/cam gears.

still has anyone done this?

I'm going to do this regaurdless of the single-dual port debate, I'm just looking for info.

again:
which gasket?
which timing belt?

I found a little more info, but mostly about USDM EJ20 heads on the EJ22 block.
Not sure if the volume of the heads is the same, JDM(old) vs. USDM(new).
If it is I will need a thinner gasket than the 2.2 uses stock.

Last edited by Scoobyslack1; 06-17-2003 at 05:03 PM.
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Old 06-17-2003, 05:02 PM   #5
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timing belt ...

dunno but i am using a 98 timing belt. sohc and dohc are the same for 98
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Old 06-17-2003, 05:17 PM   #6
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Quote:
I'm going to do this regardless of the single-dual port debate, I'm just looking for info.
Check into your 2.0L turbo idle circuit, since that carries along with the intake manifold. It may be different from the 2.2L turbo idle circuit, depending on model year.
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Old 06-17-2003, 05:38 PM   #7
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Default thanks for the warning...

well we got '96 1.8L wiring to work with '93 2.2L motor...we can make it work
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Old 06-17-2003, 08:31 PM   #8
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I believe you will have to use the new WRX Timing Belt...You have to think about Piston/Valve contact...Claying the Combustion Chambers may be neccessary....

Zee
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Old 06-17-2003, 08:45 PM   #9
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dont get me wrong, i support you on the swap, I just wouldnt do it myself because i dont have the excess time or money.

Im sure it will work fine assuming that you are using all the ej20 head parts... I think even the ej20 timing belt.

You might also run into injector problems.
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Old 06-18-2003, 09:24 AM   #10
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Lightbulb

the injectors should be the least of my worries...since I will be getting the fuel rails w/it all
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Old 06-18-2003, 11:21 AM   #11
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hmm i guess i ned to say this differntly

the timing belts are ALL the same..
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Old 06-18-2003, 11:47 AM   #12
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Thumbs up

Quote:
Originally posted by Jaxx
hmm i guess i ned to say this differntly

the timing belts are ALL the same..
thanks....
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Old 06-19-2003, 01:30 AM   #13
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Quote:
Originally posted by Scoobyslack1
the injectors should be the least of my worries...since I will be getting the fuel rails w/it all
I meant more along the lines of the ECU controlling the injectors. If you dont have the turbo, they will run way rich, w/ the turbo, you will have the wrong fuel map. Basically u need fuel managment.

In addition, u might want to look into this. I was told that the EJ22/25 IACV plug is different from that from the WRX, which would be on the WRX intake mani. If using the EJ25 ecu, this will likely be a problem. If you use the WRX ecu, u will have to rewire everything.
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Old 06-19-2003, 10:06 AM   #14
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I already have a Link+ running my Legacy turbo motor

Team ARG!
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Old 06-19-2003, 04:21 PM   #15
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Quote:
Originally posted by Scoobyslack1
this would also be going from SOHC to DOHC, I would be getting everything from the heads up, intake manifold, throttle body, fuel rails, STi injectors and cams/cam gears.

still has anyone done this?
This is basically what I am doing but with the diffrent motor. Of course I am a moron and I doubt I could answer any of your questions. But... You know who could. So mabye he might have some good input for you.

Just wanted to give ya a heads up.
-Neal
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