Jump to content


Welcome to Ultimate Subaru Message Board, my lurker friend!

Welcome to Ultimate Subaru Message Board, an unparalleled Subaru community full of the greatest Subaru gurus and modders on the planet! We offer technical information and discussion about all things Subaru, the best and most popular all wheel drive vehicles ever created.

We offer all this information for free to everyone, even lurkers like you! All we ask in return is that you sign up and give back some of what you get out - without our awesome registered users none of this would be possible! Plus, you get way more great stuff as a member! Lurk to lose, participate to WIN*!
  • Say hello and join the conversation
  • Subscribe to topics and forums to get automatic updates
  • Get your own profile and make new friends
  • Classifieds with all sorts of Subaru goodies
  • Photo hosting in our gallery
  • Meet other cool people with cool cars
Seriously, what are you waiting for? Make your life more fulfilling and join today! You and your Subaru won't regret it, we guarantee** it.

* The joy of participation and being generally awesome constitutes winning
** Not an actual guarantee, but seriously, you probably won't regret it!

Serving the Subaru Community since May 18th, 1998!

Guest Message by DevFuse
 

Photo
- - - - -

EJ22 vs EJ22 with 1.8 heads for my 93 IMP


  • Please log in to reply
11 replies to this topic

#1 A DOG

A DOG

    Subaru Ninjai for hire

  • Members
  • 859 posts
  • Bozeman

Posted 30 May 2010 - 09:57 PM

Im putting the 2.2 in my 1993 Impreza. So i am wondering who has done this? and does it work fine putting the EJ18 heads and intake on top of the EJ22? Im just looking to get better compression and better power out of a EJ22. I am planning on new timing belt kit, water pump, JDM racing lightweight flywheel, stage 1 clutch, cold air intake and open exhaust.

Any info is very appriciated.

#2 Legacy777

Legacy777

    Moderator

  • Moderator
  • 12,582 posts
  • Houston, Tx

Posted 31 May 2010 - 07:48 PM

What year EJ22?

#3 A DOG

A DOG

    Subaru Ninjai for hire

  • Members
  • 859 posts
  • Bozeman

Posted 10 September 2010 - 10:10 PM

Sorry, forgot bout this post! The swap draws very near and the donor block in question is a early 90s leg version. also wondering bout headgasket thickness..... know there are a cpl ( i think .035-.045...) thanks!

#4 Gloyale

Gloyale

    It's a sickness

  • Members
  • 9,038 posts
  • Corvallis, OR PNW

Posted 11 September 2010 - 04:01 PM

I have always heard rumor about 1.8 heads having higher compression......but I think it's just that....rumor.

I've examined the heads, and I cannot find any differences in head design, shape, or quench area. Pretty sure they are the same heads (1.8 heads have EGR port drilled)

I would say just swap the EJ18 intake onto the 2.2 and go with it. I doubt you will notice any difference other than a lighter pocket book from swapping the heads.

#5 GeneralDisorder

GeneralDisorder

    Elite Master of the Subaru

  • Members
  • 20,280 posts
  • Portland

Posted 11 September 2010 - 09:03 PM

I was told second hand that head shops have to label the 1.8 heads to distinguish them since they are virtually identical to 2.2 heads.

Also - lots of people have used both for the Frankenmotor build (EJ18 and EJ22 both being common Impreza engines), and there seems to be no difference in how they run.

Everything I've read points to them being basically the same casting (as well as 22T heads). I wouldn't worry about it at all.

GD

#6 A DOG

A DOG

    Subaru Ninjai for hire

  • Members
  • 859 posts
  • Bozeman

Posted 13 September 2010 - 08:30 PM

My buddy works at a subaru shop that is doing the rebuild. Would an 97ish DOHC EJ25 (oval or square port?) block work with the EJ18 head? More displacement equals POWAA! and if it means risk rebuild every 60K then thats ok.

#7 GeneralDisorder

GeneralDisorder

    Elite Master of the Subaru

  • Members
  • 20,280 posts
  • Portland

Posted 14 September 2010 - 01:08 AM

What you describe is known as the "Frankenmotor" and is a pretty common upgrade. It's a high-compression build in the 180 to 200 HP range. You use the EJ25D head gaskets and the compression is aroun 10.8:1 to 11.5:1 or so. In conjunction with a cam regrind it's a real kick in the pants.

GD

#8 renob123

renob123

    Subaru Nut

  • Members
  • 719 posts
  • Hillsburrito, OR

Posted 14 September 2010 - 10:05 AM

You should read every page of this:

http://forums.nasioc...ht=frankenstein

Jacob

#9 A DOG

A DOG

    Subaru Ninjai for hire

  • Members
  • 859 posts
  • Bozeman

Posted 14 September 2010 - 10:42 AM

Thanks for all the info guys. I already have a 92 EJ22 sitting on my porch. Just debating on trying to find an EJ25 or just sport the EJ22 for a while. Thanks for the link renob. There is mad information there.:banana:

#10 A DOG

A DOG

    Subaru Ninjai for hire

  • Members
  • 859 posts
  • Bozeman

Posted 14 September 2010 - 06:48 PM

Ok, read up on that thread... Didnt actually find any info pertaining to simply using a ej25dohc block with my ej18 heads, seems like it should b ok, but i know that the ej25dohc blocks are of course interference so im trying to see if it will be straightforward bolt up or if its a guts job. any insight is awesome and makes you a crunchy subaru guru hahahaha

#11 renob123

renob123

    Subaru Nut

  • Members
  • 719 posts
  • Hillsburrito, OR

Posted 14 September 2010 - 07:02 PM

Ok, read up on that thread... Didnt actually find any info pertaining to simply using a ej25dohc block with my ej18 heads, seems like it should b ok, but i know that the ej25dohc blocks are of course interference so im trying to see if it will be straightforward bolt up or if its a guts job. any insight is awesome and makes you a crunchy subaru guru hahahaha


I'm no guru, but I'll take some Slow Elk:-) Your question is covered in that thread, and a member here did that swap. You can find it by searching for "Frankenstein" here, I bet. It was in an Outback Sport, I think.

Jacob

#12 GeneralDisorder

GeneralDisorder

    Elite Master of the Subaru

  • Members
  • 20,280 posts
  • Portland

Posted 15 September 2010 - 02:48 AM

Since there's no real differences between EJ18 and EJ22 heads - it should be virtually identical to what was covered in that thread.

GD




0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users