[Will a SOHC ej25 head mate with an SOHC ej22 block?]

"Any general advice?"

 

Don't do it unless you have alternate transportation and money to burn on this learning experience. It's not going to be *if* you blow up the engine, it's going to be how many of them you blow up before you figure out how to do it and make it somewhat reliable. I'm going to say 3 - either you figure it out by the third engine, or you give up after that many failures. 

 

GD

The car in question is one out of four cars I own, the other three run reliably. It's a project car, I bought it to tear it apart and mess with. Funding is not an issue either, right now I'm feeling out directions to take with it wether it be swapping the heads, turboing the existing motor or buying another motor to swap in. 

[Will a SOHC ej25 head mate with an SOHC ej22 block?]

I'm attempting to turbo my N/A ej22, car is a 1999 Legacy L 30th Anniversary edition. I don't see why a phase 2 ej25 head won't mate up with the phase 2 ej22 block and they are both SOHC but I know that there is greater wisdom than I posses lurking in these forums. My ej22 block has single port heads and I want to swap them our for the ej25 duel port heads in order to run boost. 

what issues do I face?

will the heads mate right up to the ej22 in a "plug and play" way?

will my stock ECU know what to do with the ej25 cam? 

Any general advice?

 

I will also be switching the full intake manifold so advice on that would be greatly appreciated. 

Are there different sensors I need to be aware of? 

Line placement issues?

[New here, Off-roader from Pheonix, AZ]

I began building my 1999 Subaru Legacy L 30th Anniversary about a year ago. I bought it used but stock. 

ej22 naturally aspirated 

 

Modest mod list:

front light bar

bumper delete (fancy for "I smashed my bumper on a rock and it no longer fit properly so I removed it")  

the coolest roof mounted rainbow light bar you've ever seen 

215 70R 16 General grabbers 

Forester shocks and struts