Hello. I was wondering if the DOHC heads off my outback will fit a 2.5 block that originally was SOHC? Thanks for your time.
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*!
* 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
EJ25 DOHC Heads on SOHC block?
Started by
[HTi]Johnson
, May 23 2007 02:30 PM
4 replies to this topic
#2
ShawnW
-
- Administrator
-
- 12,921 posts
Subaru Master Technician
- Denver, Colorado
Posted 24 May 2007 - 10:03 PM
Yes. Direct swap no problem.
#3
86BRATMAN
-
- Members
- 3,221 posts
Subaru Master
- Tazewell Virginia
Posted 24 May 2007 - 10:07 PM
I think the combustion chamber is smaller on the dohc, so you'd have somewhat higher compression ratio after the swap.
#4
ShawnW
-
- Administrator
-
- 12,921 posts
Subaru Master Technician
- Denver, Colorado
Posted 24 May 2007 - 11:57 PM
Nope just a difference in the pistons themselves but compatible all the same. SOHC pistons are higher compression.
#5
Aspen
-
- Members
-
- 31 posts
USMB Regular
- Ontario
Posted 25 May 2007 - 12:39 PM
Your new compression ratio will depend on the gasket you use. I suggest a cometic 60 thousands. Should be around 10.6:1. should be good on 89 octane.
0 user(s) are reading this topic
0 members, 0 guests, 0 anonymous users
