My buddy and I came up with the ultimate WRX motor if time and money weren't invovled.
Enjoy . . .
Actually, if it were me, I would put the 2.2 stroker in a 2.2 block (closed deck vs open deck, piston squirters), sleeve the block, go with JDM v7 STi heads, high lift long duration cams, and build an undersquare high revving 2.3 is what it worked out to. I would go with custom long rods and JE 8.5:1 pistons, built 5spd dog-box (clutchless shifting, barely streetable). TWM 50mm throttle bodies (4), dual blow throw air boxes, twin GT2835s, dual intercooled.
I figure the displacement would be something like this, a closed deck 2.2 legacy block has a bore of 96.9mm, id close that up to 96 for a stronger wall to go with retarded boost. The stroker crank, along with the 2.5 crank, has a 79 mm stroke. pi r squared X stroke X 4 Roughly a 2.3 litre (2.289)
Using the Legacy block will give you more deck heighth, so you could run a longer rod (same dimensions as 2.5 STI, but the STI is open deck), basically I would go 1.5mm over on the rods, custom.... the longer it is, the higher it will rev, it reduces piston speed and works perfect in combination with a good turbo. The stroke would remain 79, but the rod length would go up, the wrist pin on the piston would move higher and compression ratio would be 8.0 or 8.5:1, using JDM STI v7 heads, to flow more. TWM's with custom flowing airboxes to flow retarded boost easily. Twin GT2835s, the GT28 would be too slow spooling, or twin GT25s, but the 2835 is a quick spooler. Or maybe just a single T88D.
As far as turbo options..... well, anything you throw at a motor like that, it would be able to handle. Its the best of everything and overkill in every area. Probably about 500hp reliable daily driver beating, with the capability of 800-900... more if you closed up the bores even more and put some heavy duty sleeves in it.
Oh, and most stroker kits are just reworked 2.5 litre cranks with some strengthening. The reason it only works out to 2.2 in an EJ20, is because the EJ20 has smaller bores (92mm), that and a lower deck height (if I'm not mistaken) than the bigger motors, so you get a short rod combo, great for torque, but not SUPER high boost... still, it'll take more than a stock crank ever will, but the wear on the block will be horrendous.
Here are some specs of the 3 motors I talked about
EJ20: Bore 92mm x Stroke 75mm
EJ22: Bore 96.9mm x Stroke 75mm
EJ257: Bore 99.5mm x Stroke 79mm
Cobb, Jun, Tommy Kaira stroker kits: Forged 92mm pistons, forged 79mm crank
Oh, and might you consider ESX for stroker kits, they have a 740hp model you can buy..... check it out http://www.turbomagazine.com/features/0301tur_ej20/
Or the axis 2.4 litre motor. Its a 2.2 or 2.5 block, using a custom 2.5l crank (79MM stroke) and its sleeved.... this motor is made for retarded amounts of boost. http://www.axispowerracing.net/engine.html