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Old 04-10-2009, 05:50 AM   #1
00boostedRS
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Default EJ22T question

Is it true that by just adding a set of EJ20H or EJ20G heads to a stock EJ22T( and all the nessesary wiring ) you can add HP just because the stock heads off the 22T flow so poorly?
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Old 04-10-2009, 09:15 AM   #2
RallyColtTurbo
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Yes, but you need an intake manifold also. Few other small details, but nothing major. Compression ratio goes down, but those that have done it say the minor tradeoff is worth it.
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Old 04-10-2009, 11:47 AM   #3
69subaru360
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You could also use the 96-99 EJ25 dohc heads they are just about the same as the EJ20G and EJ20H heads and may be easier to come by for you.
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Old 04-10-2009, 12:22 PM   #4
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Quote:
Originally Posted by 69subaru360 View Post
You could also use the 96-99 EJ25 dohc heads they are just about the same as the EJ20G and EJ20H heads and may be easier to come by for you.
May be easier to come by, but not everyone has the ability to convert them over for oil and cooling. Just something to consider as a part of the equation.

Also, the Ej20H manifold allows for the conversion over to an under manifold inlet and straight in turbo. This means a td04 or any other late model turbo that would be an upgrade for the Ej22T becomes a bolt on option during the head conversion.
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Old 04-12-2009, 03:38 AM   #5
00boostedRS
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Yeah Ive heard about the DOHC outback heads working good. Would the compression ratio be about the same on those as the 20G or 20H's? Is there a plug you can just remove from the 96-99 DOHC heads and add a tap for oil or is it a lot more complex then that? I was thinking of just getting at JDM TD05 with the elbow in the inlet so it would be a direct bolt on for my inlet piping. Would I have to use the intake manifold off the 96-99's or with the use of that year head or do I have other options?
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Old 04-12-2009, 03:40 AM   #6
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Also question about the Twin turbo trannys. How strong are they? Im aiming for the 300 to 350 WHP mark and I just wanted to know if that tranny could handle it or not
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Old 04-12-2009, 04:53 AM   #7
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Quote:
Originally Posted by 00boostedRS View Post
Also question about the Twin turbo trannys. How strong are they? Im aiming for the 300 to 350 WHP mark and I just wanted to know if that tranny could handle it or not
Same strength as any other turbo 5-speed from those years. Nothing special.
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Old 04-12-2009, 09:57 AM   #8
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Quote:
Originally Posted by Matt Monson View Post
May be easier to come by, but not everyone has the ability to convert them over for oil and cooling. Just something to consider as a part of the equation.
.
Are the 96-99 heads and the ej20g heads made from the same general casting?

Isn't the Ej20h and Ej20g longblock identical, with a different intake manifold? I read that on RS25.

sorry for the hijack.
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Old 04-13-2009, 12:33 AM   #9
00boostedRS
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Ah I kinda wondered if they were about the same as the WRX trannys. Do the Auto trannys on the Leg SS's weight more than the manuals?
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Old 04-13-2009, 12:49 AM   #10
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AUTO trannies are HEAVY.
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Old 04-14-2009, 12:35 AM   #11
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Yeah thats what I thought, they look real bulky compared to the manuals. Any idea how much lighter they are that the auto's?
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Old 04-14-2009, 12:26 PM   #12
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the ej20r had the ra spec gears in the box
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Old 04-15-2009, 03:41 AM   #13
00boostedRS
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oh really so does that mean a 97 legacy twin turbo tranny would have the RA spec gears?
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Old 04-15-2009, 03:56 AM   #14
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Probably, I am using that gear set with a 400/400 setup and it hasnt failed....fingers crossed.
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Old 04-15-2009, 04:55 PM   #15
00boostedRS
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whats a 400/400 set up mean?
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Old 04-15-2009, 05:09 PM   #16
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400 hp and 400 tq
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Old 04-15-2009, 10:52 PM   #17
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ah I see
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