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I have been reading through some of the WRX/ liberty forums and noticed that many of them use are using 2.2litre blocks to build their turbo engines on. Sounds like there are stroker kits out there that bring the capacity up to 2.4 or 2.5 litres. Just wondering if anyone has tried stroking their SOHC ej22 or whether it is possible or not.

I havnt been able to find any info on a performance build up of an NA SOHC ej22 because everyone is just TURBO TURBO TURBO! So it would be good if someone good shed some light on the matter.

Thanks

From my own research I've discovered that using EJ25 rods and crank (assuming they fit) in any other EJ engine gives you about 100mL capacity increase.

If you wanted to mix and match parts to tweak an EJ22 your best bet would be to use EJ25 rods and crank and the EJ25 SOHC heads, or if this isn't for your tourer then go with DOHC heads, this would give you a 2.33L engine with fairly high flowing heads.

The above are all based on the unconfirmed assumption that all parts can be mixed and matched and will fit.

Have a look here for more info:
http://wac.addr.com/auto/obs/turbo/ejcalcs.html

But if you're going to this effort why not just get a EJ25?

Jordan.

Thanks for that info. When i eventually get the money to build this engine it would be for my tourer. I thought that using an ej22 block instead of the ej25 would make it easier to legalise as i was under the impresion that 2.2litre was the maximum allowable capacity for an my. It would also fit withought modification to the chassis rails, whereas the ej25 DOHC needed more cutting than turbo motors. Im also guessing its pretty hard to scource an ej25 SOHC because they wernt released in oz, I have not yet come across one in my search for an ej22.

I don't know how much it varies from state to state but in NSW you limit is 2L, you can of course bore as well as stroke, to acquire larger capacity but by the time you've done all that it might have cost just as much as getting it properly engineered to a larger engine.

I don't know for sure, but just do a lot of research first, make sure you take the best option.

Jordan.

I did some research on turboing a SOHC EJ22 but never pursued it that fardue to $$$ constraint

What I do recall is the EJ22 is used instead of the EJ25 because it is a stronger block with thicker cylinder walls more suited to high HP applications.
Apparently EJ25 crank and rods are the go as they drop right in, some also do a small bore out with custom turbo friendly forged pistons.

I think the heads were modified (due to differing bore I think) early GTB ones as they have the best flow - but I cant remember exactly

You can fit the 2.5 crank and rods in to the 2.2. You can not bore the 2.2 out to become a 2.5 with out making it a wet sleeve set up. If you find a 2.5 block you can put your heads on to it and retain the SOHC.

The 2.5 litre stroke is only 4mm longer than the 2.2

Thanks for the help with which parts fit which. I originally had no idea the 2.5 crank and rods would bolt up. This would be a much cheaper option than the aftermarket stroker kits and wouldnt affect the bore to sroke ratio as significantly.

Time to get parts searching!

TW83 wrote:Thanks for that info. When i eventually get the money to build this engine it would be for my tourer. I thought that using an ej22 block instead of the ej25 would make it easier to legalise as i was under the impresion that 2.2litre was the maximum allowable capacity for an my. It would also fit withought modification to the chassis rails, whereas the ej25 DOHC needed more cutting than turbo motors. Im also guessing its pretty hard to scource an ej25 SOHC because they wernt released in oz, I have not yet come across one in my search for an ej22.

I thought the SOHC 2.5 is what the current forester and previous models ran all except the first Outbacks that had the DOHC 2.5?

I see where you are going with your thoughts TW83, I am considering an engine swap in my '82 wagon, but it looks the way and easier to put an EJ 2.2 or 2.5 into an L-Series, and get it certified....then modify it he he.
Reason, more room in engine bay, better brakes and if it was an MPFI model, even easier. I would do a EJ18 in the MY however, when comes the time, or just go for a L project straight up, see where the dollars are first.

Modifing the 2.2 seems an awfull long way to acheive "legality". Just my thoughts....

everyone is just TURBO TURBO TURBO!

Not that there's anything wrong with that ...

I posted this topic just to explore the possibilities of modifying the ej22. I dont plan on going through with this in the near future ,as I still havnt fully committed to the conversion and ill probably be stoked with the difference the ej22 makes as standard. Knowing me though, i'll get greedy and soon enough want more power!!

Nothing wrong with turbos either, just shits you when theres 15000 search results for ej20t's and none for the unloved ej22.

TW83 wrote: unloved ej22.

Not by this black duck!!

I LOVE MINE!!
She is shiny and purrs like a kitten.
Screams when you twist her tail too,

Keep researching though, I like where this is all going.