Jump to content
Ultimate Subaru Message Board
Nutt_resuved

DOCH EJ25 in Swingback/Leone possible?

Recommended Posts

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

Share this post


Link to post
Share on other sites

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.

Share this post


Link to post
Share on other sites
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

Share this post


Link to post
Share on other sites

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.

Share this post


Link to post
Share on other sites

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:)).

Share this post


Link to post
Share on other sites
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

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

×