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Old 06-13-2009, 08:39 PM   #1
anothernord
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Default My supercharger build: 97' Legacy: COMPLETED!

My supercharger build; a 1997 Legacy Outback; 2.5L DOHC, supercharged with an Eaton M62 blower.



Parts list:

-Eaton M62 roots type supercharger (positive displacement)
-2006 WRX TMIC
-Turbo XS RBV-H34 Bypass valve
-2006 STi fuel pump
-RalliTEK Perfect Power 6 piggyback EM
-NGK BKR7E-11 plugs (one step colder)
-Custom double power steering pulley
-Innovative LC-1 Wideband O2 setup

RS25.com member Skidd inspired me to take on this build with his own SC project on a 2000 RS. Our engines aren't too dissimilar, and the basic concept is the same.

Skidd's SC build:
http://www.ludicrous-speed.com/wiki/...C_Build_Part_1

So I have been gathering parts and knowledge over the last few months, and today I got a little present in the mail thanks to ebay: an Eaton M62 supercharger from a 2001 Mercedes Kompressor.

I will not just be slapping this on my car, I intend to do it correctly. Although I want to keep cost down as much as possible, there is one thing I did splurge on; EM. I bought a used RalliTEK Perfect Power 6 piggyback ECU complete with all the accessories needed. I also snagged a set of one step colder spark plugs to help avoid detonation, as well as an STi fuel pump.

I bent the PS lines back toward the IM for a little more clearance there.



I have moved the ABS pump to allow more room for the SC. I just used the trusty sawzall and cut open the fender, then bent the lines by hand as I slid the pump in. I drilled new holes, and secured the pump with the old bolts plus nuts and lock washers.





Also, I moved the alarm speaker, and the charcoal canister to the back of the engine bay.

Next obstacle is routing the pulley. Should weld a pulley onto another power steering pulley then run the SC flat like reddevil? Or can I somehow take apart the SC and flip the rotors inside around so I can mount it upright like Skidd? I shall see...

If you see some glaring error in my plans please tell me. I like to take advice, suggestions, and questions. I'll be updating this thread from time to time.
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Last edited by anothernord; 10-26-2009 at 07:31 PM. Reason: More parts!
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Old 06-14-2009, 11:23 AM   #2
anothernord
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Next step is to make a plate like Doug's to mount to the heads, and support the SC from underneath. The way it looks, i'll have to support the plate from underneath and brace it on the valve cover somehow.
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Old 06-14-2009, 11:31 AM   #3
Kevin Thomas
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Good luck! Will be watching!
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Old 06-14-2009, 12:54 PM   #4
slaytalera
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Old 06-14-2009, 01:27 PM   #5
Subie Steve
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Nice; buddy of mine has a '97 Legacy Outback. I'll have to show him this
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Old 06-15-2009, 12:12 AM   #6
woodys77
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cool project but why the 06 wrx tmic thats probably the worst year i/c to have.
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Old 06-15-2009, 12:52 AM   #7
Skidd
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^ It's all about fit. The skinny TMIC is the easiest fit between teh TB and the firewall. Remember, the intake manifold on the Turbo cars is quite different compared to the NA cars. To use a regular WRX or STi intercoolers would require trimming down of the opening, trimming of the TB, and often still bang the firewall. The FXT/06 WRX just fits better with less hassles.
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Old 06-15-2009, 08:41 PM   #8
woodys77
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i see.. you probably dont need much of an i/c for a supercharger running at 5psi anyway it shouldnt make much heat at all. cool build though are you going to dyno it when completed?
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Old 06-16-2009, 02:44 PM   #9
ibanez24_7
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Nice! Seeing mroe and more SC builds popn up and its been making me want to do one myself. My question..is that a NA block your SCing or did you swap out interanals or do any mods what so ever? TRying to figure out if 5-7 psi will be safe or if I need to build the motor to handle the boost. Thanks, hope to make a similar thread when I get to it.
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Old 06-16-2009, 02:53 PM   #10
anothernord
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Quote:
Originally Posted by ibanez24_7 View Post
Nice! Seeing mroe and more SC builds popn up and its been making me want to do one myself. My question..is that a NA block your SCing or did you swap out interanals or do any mods what so ever? TRying to figure out if 5-7 psi will be safe or if I need to build the motor to handle the boost. Thanks, hope to make a similar thread when I get to it.
The engine is just a plain ol' Subaru 2.5 N/A with stock internals. It is newer because the car had a new short block straight from Subaru put in. I'd say 7psi is a little on the high side for stock internals, but 5 psi with proper engine management should be fine. Also you will want an upgraded fuel pump and one step colder spark plugs. Stock injectors should be able to handle 5psi no problem.

But most importantly, engine managment; you have to pull back timing and add fuel. That's the key to making succesful boost on an N/A motor.
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Old 06-16-2009, 02:59 PM   #11
anothernord
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Quote:
Originally Posted by woodys77 View Post
i see.. you probably dont need much of an i/c for a supercharger running at 5psi anyway it shouldnt make much heat at all. cool build though are you going to dyno it when completed?
You'd be surprised at how much the intercooler lowers the intake air temperature, and that's super important in preventing detonation.

Last edited by anothernord; 06-16-2009 at 06:31 PM.
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Old 06-16-2009, 05:52 PM   #12
Kevin Thomas
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Quote:
Originally Posted by anothernord View Post
You'd be surprised at how much the intake lowers the intake air temperature, and that's super important in preventing detonation.
This is interesting! How does the intake lower the air temperature?
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Old 06-16-2009, 06:31 PM   #13
anothernord
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Quote:
Originally Posted by Kevin Thomas View Post
This is interesting! How does the intake lower the air temperature?
Lol, whoops, meant to say intercooler.

In other news, I got my Perfect Power 6 today, so I'll be wiring that up soon.
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Old 06-17-2009, 02:02 AM   #14
anothernord
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Got my RalliTEK Perfect Power 6 ECU wired in today, and it was not as hard as I expected.

Now I just have to figure out how to use the software. It didn't start with the all 0 base map, which was to be expected, but I loaded a map for a 2005 2.5RS and it ran ok. I'll mess with it more in the coming days, while I try to find a large aluminum plate to mount the SC on. The STi fuel pump should be getting installed soon as well.

I'll post up the wiring diagrams in the Electrical section soon, its really quite simple to install.

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Old 06-17-2009, 01:19 PM   #15
ibanez24_7
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Quote:
Originally Posted by anothernord View Post
The engine is just a plain ol' Subaru 2.5 N/A with stock internals. It is newer because the car had a new short block straight from Subaru put in. I'd say 7psi is a little on the high side for stock internals, but 5 psi with proper engine management should be fine. Also you will want an upgraded fuel pump and one step colder spark plugs. Stock injectors should be able to handle 5psi no problem.

But most importantly, engine managment; you have to pull back timing and add fuel. That's the key to making succesful boost on an N/A motor.
Ahh thanks very much for the info. Keep reading posts where everyone says its impossible to add FI to a NA motor without it blowing. Im looking at that raptor SC kit. Doing more info digging on it before I drop $3k on it. They say it comes with a piggy back to make the corrections. I may take it to a spped shop jsut to be sure. GL with the rest of the project looks like its coming out well.
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Old 06-17-2009, 06:16 PM   #16
FunkRider
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Quote:
Originally Posted by woodys77 View Post
i see.. you probably dont need much of an i/c for a supercharger running at 5psi anyway it shouldnt make much heat at all. cool build though are you going to dyno it when completed?
That M62 isn't very efficient and actually makes a fair amount of heat even at 5 psi. I don't think there will be a dangerous amount of heat without a means of charge cooling under normal conditions.

What generation M62 is it?
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Old 06-17-2009, 08:35 PM   #17
anothernord
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I believe its a 1st gen, but the compressor maps aren't all that different, just the efficiency.
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Old 06-18-2009, 12:13 AM   #18
PA-Outback2000
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what power do u expect to get out of this build?
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Old 06-18-2009, 12:35 AM   #19
anothernord
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Quote:
Originally Posted by PA-Outback2000 View Post
what power do u expect to get out of this build?
I'm looking for about 220 Hp at the crank.
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Old 06-18-2009, 01:50 PM   #20
PA-Outback2000
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u can do that N/A too. good luck to u.
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Old 06-18-2009, 04:05 PM   #21
Skidd
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^ Sure, it's possible N/A, but not at the low cost of adding an SC (or a TC). Plus as N/A power goes up, driveability can start to suffer as the necessary cams to make that power start to affect idle vacuum and the torque available in lower RPMs. So... yeah.. doable, but not as easy or as cheap.
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Old 06-19-2009, 10:14 PM   #22
FunkRider
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Quote:
Originally Posted by PA-Outback2000 View Post
u can do that N/A too. good luck to u.
Yeah but you don't get 200+ ft lbs of torque available off idle with a NA setup.
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Old 06-19-2009, 11:52 PM   #23
Gclark
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epic build, good luck man!
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Old 06-27-2009, 07:14 PM   #24
anothernord
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Ok, here is the diagram for my 1997 single plug ECU.

The information for configuration is clearly laid out in this thread on Nabisco:

For my Phase I DOHC, "Teeth per turn" should be 14, and "Teeth per firing" should be 20.

A Heap of Stuff Regarding the Perfect Power SMT6 - NASIOC

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Old 07-10-2009, 10:34 PM   #25
anothernord
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Ok, It's been a while but today I finally got a mounting plate fabricated and fitted. Its a 1/4" plate of aluminum, with a 3/8" spacer for the rear mounting tab. Underneath the plate will be a shelf support bracket, which will brace the SC against the valve cover. I also made the intake and exhaust plates that will attach to the SC. They still need to have large holes cut in them and aluminum tubes brazed on.




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