OK, I know it been beat like a dead horse, but I have a couple thoughts and questions. I am getting ready to build one and have a couple ideas, maybe. I'm building this for a 95 legacy 5 speed. Option 1, if I use a 2.5 phase 2 block from a 2002 with 95 2.2 heads, is it an interference or non interference motor? Option 2, I have a new set of 2002 Wrx dual cam 2.0 heads. Would that be a good combo with a 2.5 motor? I know I would have to change the ECU and wiring and I'm fine with that if its a better option. Or should I just be smart and do a basic 2.5 with my 2.2 heads?

 

Any input would be welcomed.

 

Thanks,

Dp213

Ok, option 1 requires cometic head gaskets . If you can find a set of Phase 2 2.2 Heads that will use stock turbo gaskets.

 

2.5 Block + 2.2 = higher compression and more horsepower, etc...

 

2.5 Block + those 2.5 heads (which are designed for a turbo) will be less compression and less horsepower.

 

But you could put that 2.5 block w/ 2.5 heads and the turbo from that 2.5 WRX in it................  That's a whole different conversation though.

If I go with option 1 is it a non interference motor

Any option using a 2.5 Block (EJ25) and stock length rods is going to be interference due to the EJ25 being stroked in comparison to the EJ22.

Edited September 19, 201510 yr by lstevens76