Nutt_resuved Posted September 30, 2009 Share Posted September 30, 2009 Hi everyone, Just got my hands on a 78 Hatch. I'm thinking about swaping 1996 EJ25 DOHC into it. Is it possible without chassis modification as I want to keep the chassis original? If the answer is no then can I use the SOHC head and manifold from EJ16/18/22 to reduce the overall width? I will appreciate any comment. Alex Link to comment Share on other sites More sharing options...
subaru360 Posted September 30, 2009 Share Posted September 30, 2009 No, it won't fit without cutting the frame rails a lot, if you can even get it in there. You might even have to notch the rails a bit for the sohc. Yes, you can put the sohc phase 1 heads on the 2.5 dohc phase 1 block, but it will raise the compression. Link to comment Share on other sites More sharing options...
Nutt_resuved Posted October 1, 2009 Author Share Posted October 1, 2009 No, it won't fit without cutting the frame rails a lot, if you can even get it in there. You might even have to notch the rails a bit for the sohc. Yes, you can put the sohc phase 1 heads on the 2.5 dohc phase 1 block, but it will raise the compression. Thanks. The raise in compression ratio is what I'm looking for. I want about 11:1 CR. Is EJ25 block wider than EJ22 block? If yes, can anyone tell me how much wider? Alex Link to comment Share on other sites More sharing options...
subaru360 Posted October 1, 2009 Share Posted October 1, 2009 All EJ engine blocks are the same width. The DOHC heads are bigger. The engine is about 3-4" wider. I have both here, I will try and remember to measure them. Link to comment Share on other sites More sharing options...
Leeroy Posted October 1, 2009 Share Posted October 1, 2009 Just got my hands on a 78 Hatch. Are you sure you have a 78 Hatch? Perhaps it is a 1980's hatch? It is my understanding EJ engines will fit far easier in 1980's model Subaru's (...and I have never seen a 1978 Hatch:)). Link to comment Share on other sites More sharing options...
Nutt_resuved Posted October 2, 2009 Author Share Posted October 2, 2009 Just got my hands on a 78 Hatch. Are you sure you have a 78 Hatch? Perhaps it is a 1980's hatch? It is my understanding EJ engines will fit far easier in 1980's model Subaru's (...and I have never seen a 1978 Hatch:)). I not so sure. I thought it's 78, but I might be wrong. It may be 80s like you said. Alex Link to comment Share on other sites More sharing options...
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