idosubaru Posted January 27, 2011 Share Posted January 27, 2011 EA82 is 9.0 CR ER27 is 9.5 CR 97 hp EA82 (@5,200 rpm) 145 hp ER27 (also @ 5,200 rpm) interesting that both are 24 hp per cylinder, but different CR's. where is that CR difference coming from? pistons/headgasket? Link to comment Share on other sites More sharing options...
MilesFox Posted January 27, 2011 Share Posted January 27, 2011 Correct me if i am wrong, but i believe the ea82 mpfi non turbo engine has a 9.5 compression, also Link to comment Share on other sites More sharing options...
84gl Posted January 27, 2011 Share Posted January 27, 2011 ea63- 8.5:1 ea71fe-10.0:1 ea71- 9.0:1 ea81t- 7.7:1 ea81- 8.7:1 carb ea82- 8.7:1 spfi ea82-9.5:1 mpfi ea82-9.0:1 ea82t 7.7:1 er27 9.0:1 ej22 9.5:1 Source subaru owners manuals 74-91 Link to comment Share on other sites More sharing options...
MilesFox Posted January 27, 2011 Share Posted January 27, 2011 Sweet!. We should make a sticky, or post this in the USRM Link to comment Share on other sites More sharing options...
idosubaru Posted January 27, 2011 Author Share Posted January 27, 2011 thanks, that made me look it up again, silly rabbit. 1988 Subaru XT FSM lists MPFI EA82 and ER27 as 9.5:1 so that corrects/adds to his information above and answers the question about the misinformation I had to begin with. Link to comment Share on other sites More sharing options...
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