1995 Subaru Impreza L Coupe
So i just bought a 1995 Subaru Impreza L Coupe. I was wondering how much psi of boost can a 1.8l EJ20 handle with stock internals.
will the EJ22 heads fit or will it need some modificationI believe the EJ18 is the strongest non turbo EJ bottom end. I ran almost 18 psi on an EJ18 bottom end with EJ22 heads, and I bet it would've taken more with better boost control and tuning. The larger combustion chambers of the 2.2 heads dropped the compression ratio a bunch to make boost safer. Definitely read up on things like engine management, injector options, gauges, lowering CR, etc. if you're gonna push it.