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

- - - - -

2.2 and 2.5 performance questions

  • Please log in to reply
1 reply to this topic

#1 4wheeln2


    New User

  • Members
  • PipPip
  • 10 posts
  • central KY

Posted 25 April 2004 - 01:03 PM

i have a 96 legacy wagon 2.2 n/a, and my wife has a 04 outback 2.5 has anyone out there added a cold air kit or exhaust to either of these cars? the 96 hass 111k on it and is ready for struts. any suggestions there? would like a little more performance from the 2.5 as it seems reallyt sluggish for a brand new car. any help appreciated. thanks, Pat

#2 JonOfScio



  • Members
  • 713 posts
  • Corvallis, OR

Posted 25 April 2004 - 05:33 PM

Well, check out www.rallitek.com for parts for both cars.

Easiest things to do are of course exhaust work, even something simple like changing the manifold to a header (Borla is carried on rallitek)

Now, if either of your subes are automatic, that could be one thing that would make a sure difference in feel of power. Subaru trannies aren't known for having a good transfer of power. Typically, most transmissions that are manual, carry over between 70 to 80 percent of flywheel power to the wheels. I think the typical manual (5 speed AWD) carries about 74% efficiency to the wheels. Most automatic trannies (NOT clutchless manuals, true automatics with torque converters) are about 50%!! So you're 165hp 2.5L engine could put down either between 82hp (estimate) to 122hp (on averages) just because of the type of tranny.

A stock 2.2L with a manual puts down about 100hp to the wheels from a 135hp flywheel.

To get more power to the ground, you can change your crank pulley, and flywheel. Lightening engine components puts more Hp to the ground. I think, I calculated it out, that the Perrin lightweight pulley and Exedy lightened flywheel would combine out to about 17hp gain. (flywheel hp)

Cold air works pretty well for both cars, but you have to deal with the WOT sound of it sucking in air. Which to me, is a cool sound, so I'm not too bothered. Once again, you can check out www.rallitek.com

Or you can do the cheaper method and cut the bottom of your airbox out and remove your silencer. The silencer tubing is way smaller than the intake tubing, thus it is a restriction.

hope all of this bantering helps in some way.

0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users