Jump to content
Ultimate Subaru Message Board

Anybody supercharged their gen1 legacy?


Recommended Posts

This is just my observation, so the flame suit is on, but: as long-wearing as Sube motors are, the basic open-deck, non oil-squirter, normally-aspirated engines have a tendency to suffer inordinately in the face of aftermarket forced-induction.

 

I know there are exceptions. The people that have done it successfully have stuck with small turbos, have all been REALLY anal about engine management parameters, and have resisted the temptation to get greedy with the boost.

 

Maybe it's the just the ghost of rimmer or something, but successful aftermarket supercharger installs are especially rare. Unless you're willing to drop in some low-compression forged pistons at the very least, your severely handicapping your effort at success.

Link to comment
Share on other sites

Yeah. Me.

 

Before Intercooler

supercharger-bay-callouts.jpg

after intercooler

hoodup.jpg

I have since improved the SC to AWIC connection but don't have an uploaded picture currently.

This is on a 2.2 1990 block with 225k. Running 7 psi starting at 2000rpm and rises to 9-10 psi near 6000rpm.

Upgraded the fuel pump, injectors, rrfpr, AWIC, 7.25" crank pulley, no power steering, half done upgraded exhaust.

Pretty fast, this 1990 wagon is faster uphill (more torque I suspect) to 100 than a stock EVO.

Link to comment
Share on other sites

  • 1 month later...

Another update.

 

I finally took it to the dyno.

red_devil_dyno_sheet_3_16_05.jpg

 

Turns out I did the dyno run on basically 3 plugs with the 4th having the plug wiring just resting on top of the plug. I also had a horribly clogged fuel sock in the tank that when replaced, allowed the fuel pressure to jump 10 psi. So basically I would safely add almost 10 hp and torque to the dyno numbers.

 

I am getting about 20 mpg (unless I am tracking it, then about 12). Since I solved the misfiring issue, the wagon has been running pretty well and I am damn proud of it. Of course now I need to figure out how to get more boost out of it!

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

 Share

×
×
  • Create New...