dp213 Posted September 19, 2015 Share Posted September 19, 2015 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 Link to comment Share on other sites More sharing options...
lstevens76 Posted September 19, 2015 Share Posted September 19, 2015 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. Link to comment Share on other sites More sharing options...
dp213 Posted September 19, 2015 Author Share Posted September 19, 2015 If I go with option 1 is it a non interference motor Link to comment Share on other sites More sharing options...
lstevens76 Posted September 19, 2015 Share Posted September 19, 2015 (edited) 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, 2015 by lstevens76 Link to comment Share on other sites More sharing options...
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