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
- - - - -

Retrofitting a turbo to a non-turbo forester?


  • Please log in to reply
5 replies to this topic

#1 LameRandomName

LameRandomName

    USMB Regular

  • Members
  • PipPipPip
  • 78 posts
  • Earth

Posted 23 May 2004 - 11:18 AM

Has anyone retrofitted a turbo to a N/A Forester yet?

Failing that, does anyone have a fairly comprehensive idea of what would need to be done and what is available in that specific application?

#2 Setright

Setright

    Elite Master of the Subaru

  • Members
  • 3,176 posts
  • Denmark

Posted 23 May 2004 - 01:08 PM

I haven't tried it, but since the Forester is essentially a lifted Impreza, I expect you want to look for Impreza turbo components. The floorplan and suspension subframes are the same, so the exhaust route should be similar. Ditto the engine mounts.

There should be plenty of standard turbo kits around, since most Imp GT/WRX owners upgrade.

#3 cookie

cookie

    Elite Master of the Subaru

  • Members
  • 3,058 posts
  • SFO

Posted 23 May 2004 - 04:57 PM

You can do this but you already have an engine that is marginal in design. If you must fit a turbo start with a successful tubo engine. You need a good closed deck,thick cyl walls, lower compression pistons, and rods and a good crank would be nice.
Get a whole clip complete with engine management stuff.
Or better yet trade cars.

#4 wrxsubaru

wrxsubaru

    1000+ Super USER!

  • Members
  • 1,294 posts
  • Seattle Washington US

Posted 23 May 2004 - 06:19 PM

You can do this but you already have an engine that is marginal in design. If you must fit a turbo start with a successful tubo engine. You need a good closed deck,thick cyl walls, lower compression pistons, and rods and a good crank would be nice.
Get a whole clip complete with engine management stuff.
Or better yet trade cars.



I dont know about needing a closed deck to have a good turbo charged engine, the new ej20t in the WRX is open while the ej25t is semi closed and the the ej25t seems farily robust. I think it would just be easier to trade cars, strobnger engine internals, stronger trannie and i think a diffrent suspension and brakes.

#5 cookie

cookie

    Elite Master of the Subaru

  • Members
  • 3,058 posts
  • SFO

Posted 23 May 2004 - 08:15 PM

necessary it is a real plus. The stronger you make the deck surface the less flex you get in that area. If your bore is large you may not be able to have it closed and still move enough coolant.
My theory is use the toughest piece of equipment that has been proven not only to work, but work for a long period of time.
I have built several very fast engines in the past that had the life of a mayfly.
I am an old guy now and when I build something I want it to work and for a long time without screwing with it.
The other thing I have found out is that is far easier to swap a developed system than try to do engine development yourself.
Do you have the money for a hundred dyno runs blowing up eight or ten mills? I don't.

#6 LameRandomName

LameRandomName

    USMB Regular

  • Members
  • PipPipPip
  • 78 posts
  • Earth

Posted 24 May 2004 - 10:57 PM

I wasn't looking to turn my forester into a race car.

I already have something for that.

I was looking ahead to my post warranty period and wondering how feasible it would be to get a little more power out of the engine by bolting on some parts from the forester XT. Something in the range of 6-7lbs of boost.




0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users