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Ok. Crazy Question.


Subi_Sam
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So I'll be getting a 89 RX with a bad engine hopefully soon. Now I can either repair the EA82 in it or I was thinking about swapping in a new engine. So I have a few questions about that. First: Can you swap a EJ engine into a RX? Second: If I can swap a EJ engine can I use a EJ22T block with a EJ18 crank and will that destroke the engine? Third: If previous 2 questions can happen, if I were to put EJ205 heads on my EJ22T frankenengine what would my compression ratio be around?

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You will find most of your questions answered in this sub forum. If you look for threads started by me, you will the write up about the EJ22T swap I did in my 89 RX.

If your smart, you will leave the engine stock as it has plenty of power for the RX.

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IIRC......EJ18, EJ20, and EJ22 all use the same stroke crank, 75mm.  Just the barrels/bore size changes.

 

An EJ22t would be great......Turbone did one in his RX.

 

Pretty sure ej205 heads would increase compression slightly.....maybe to 8.7~9.0 or so......a bit high for alot of boost....

Edited by Gloyale
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Well I mean I do have a STi block siting in my garage right now that I could build. I know SJR lift makes an adapter plate and flywheel to swap EJ engines into the RX. I'm not looking to run a crazy amount of boost probably 12 at max. So I'm thinking destroked STi block with 205 heads. Hybrid destroker here we come!

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