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
- - - - -

2.5 dohc more power?


  • Please log in to reply
6 replies to this topic

#1 outbackwagon96

outbackwagon96

    New User

  • Members
  • Pip
  • 8 posts
  • spokane wa

Posted 12 January 2013 - 12:35 PM

what is a good way to get a few extra ponies out of the 2.5? ive got a 96 outback and dont want a race car or anything i just want it to be a little peppy. i bought it with a rod knock getting motor rebuilt and would like to know what a couple things i could have done, cams? a header?

also its an auto:-\ would like to 5 speed swap it though

#2 89ChevondaSI

89ChevondaSI

    USMB Regular

  • Members
  • PipPipPip
  • 89 posts
  • Stoughton, WI

Posted 12 January 2013 - 02:49 PM

get the intake and manifold and TB ported, then cat back exhaust, and a different intake set up. I have a an auto '97 with +250k and when I did all this with over sized tires launching with a brake torque I could spin a little. :headbang:

#3 ShawnW

ShawnW

    Subaru Master Technician

  • Administrator
  • 12,923 posts
  • Denver, Colorado

Posted 12 January 2013 - 03:03 PM

Cams on a 4 cam is pretty expensive. Price it with Delta Camshaft though their prices are certainly fair.

#4 TajMan

TajMan

    USMB is life!

  • Members
  • 236 posts
  • SLC, UT

Posted 12 January 2013 - 03:55 PM

I think general improvements can be made all around, as mentioned..
couple things to note:
-if engine is being fully rebuilt anyway, minor improvements can be made with mild porting around areas of the cyl heads before they finish getting rebuilt w/ valves installed. You just gotta search for the right pics/tips for porting those DOHC cyl heads..
-exhaust improvements can be great, but I wouldn't do a cat-back and overlook the front, I would definitely try to re-design/finish the best cyl head-back exhaust completely. Exhaust exits from two round ports next to each other on each head, consider some long-tube (hopefully equal length) headers
ideas..
Posted Image
Posted Image
Posted Image

#5 outbackwagon96

outbackwagon96

    New User

  • Members
  • Pip
  • 8 posts
  • spokane wa

Posted 12 January 2013 - 11:24 PM

im no stranger to cars im just from the otherside of the mountains so to say, v8 land, so i dont know what these little motors "like". i was unsure of porting without doing anything else such as bumping compression etc, didnt want to shoot myself in the foot by giving up all low rpm grunt as well. this is the 1st 4 banger ive played with. id like to do an STI/WRX swap of sorts but holy cow! $

#6 outbackwagon96

outbackwagon96

    New User

  • Members
  • Pip
  • 8 posts
  • spokane wa

Posted 12 January 2013 - 11:39 PM

eye candy on the headers, got brand names to look for? ive been looking on ebay and they all say 97 and up will that fit a 96? im a total newby when it comes to things on these cars and interchangability also if i go putting a header and full exhaust on there, what do i do about the tune?

#7 newsoobdude

newsoobdude

    Subaru Nut

  • Members
  • 642 posts
  • helL A/ NorCal Foothills

Posted 13 January 2013 - 06:11 PM

I've got a 98 Outback and one of the best improvements I did was the snorkus delete. It's free and lets the car pull all the way to red line instead of falling on it's face around 3500. All you do is pull the contraption in the inner fender well of the passenger side that all the fresh air comes in from.
Another is OBX Equal Length headers. I'm running 28 inch tires under my Outback and it has more power know than before I lifted it and put the bigger tires. Wish I had done it before the lift so I could have played in the corners beforehand.
Grimmspeed made intake manifold spacers to keep the intake cooler and they also offer a thermal coating (I don't have yet). Group A did a throttle body spacer but are no longer produced but someone else might be.
You can get a cold air intake off e-bay for an Imprza RS and cut it down to fit also.
Other than that you are looking at cams from Delta and some port and light polishing work. IF I remember right, Delta can redo your heads and improved cams and porting all for a great price and all you have to do is re-bolt the heads on, no cam lash adjusting or any of that stuff.




0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users