DOHC is right but i think that only holds true for H series. B and F series motors Don't seem to have the same problems when it comes to boosting w/VTEC as h series. It's mostly quite the opposite, they boost better with the involvment of VTEC.
" I did the h22 drop in my car.... all I'll say is check your seatbelt before because you shave seconds on quater mile time and for all the turbo bullshit there talking about just ignore them worry about getting the motor in. You'll always be able to turbo charge it later as for the F22A4 it would be fun to turbo charge but no one makes a turbo manifold for the motor, you could get someboby to probally build you a custom turbo manifold but by the time you spent all the money you could drop in the h22 get a vtec controller and be kickin some ass already trust me I checked into it. "
Well it sounds like your making the decsion instead of giving him a choice himself. You can get a 2g eclipse manifold and redrill/port it to fit the a1-a6 motors, but you will have to grind off the flange and weld on the t3 flange ( if your going t3/t4 ). You also can get it custom done, there is a guy on
WWW.HONDA-TECH.COM that does this. I just im'd him today ( i'll give you his name if you want it ) to ask for a price and he said he would do it for $225, thats cheaper than a header from DC sports.
What are you goals ? If you just want to have some fun turbo the f22, the compression is begging for boost, and with proper management you can boost up to 10-12 psi daily. I was going through the choice of h22 vs boosted f22 but i want the boost NOW and the H22 should be more geared for all motor apps ( not saying turboing is impossible, just more work involved ). If you want h series and want to go turbo my suggestion would be h23, the stock motors can take a good amount of boost and you would be able to see very decent numbers with a nice sized turbo. There is a guy on honda tech that has a built h23 running 337 whp and 330 something lbs of tq @ 12 psi.
Thats the way i see it, Fun = boosted f22. Real Speed Built H23 turbo
Make your choice guy.