taza
Forum Member
Going to do a supercharger project on my 2001 Forester 2.0l N/A and Daves (Davidov's) 2003 Outback 2.5l N/A
After reading up about it and talking to Raptor Chargers (they do kits for Subaru's both N/A and turbo aswell as other vehicles), Subarino (Ausubaru - Supercharged his old EJ22 N/A L-Series Hatch), a few guys on Ozfoz along with a couple of commodore (Holden) forums it doesn't seem too much invloved.
The Charger: SC14 Toyota supercharger which they ran on the Supra
Whats Invloved: If boost is kept low (below 5psi) then an ECU piggy back, intercooler and fuel system upgrades are not neccessary on an N/A EJ20,22 or 25. Since these engines are still only OBD I (until around 2005 I think it went OBD II in Australia) then it isn't hard to trick the ECU into running properly with the charger aslong as too much pressure and force aren't put on the engine. It needs to be kept within stock limits.
So in reality its pretty much bolting the charger on after making a bracket to fit in the engine bay, run some simple wiring and piping for the air intake and power, the pulley system needs to be lined up and a V-belt installed.
Parts:
- SC14 charger (includes the stock pulley)
- cheap ebay BOV (Blow off valve to allow air to vent when the manifold butterfly is closed) - I think that's the correct term...
- a V-belt to run between the charger, crank pulley and possibly A/C unit
- Air intake piping
- a steel bracket welded up to support the S/C
- Some simple power wiring and a dash switch to turn it on or off like your A/C compressor - This can only be done with certain types of S/C
- Pod filter
There will of course be small extra things but thats the majority of it from my understanding.
My EJ20 N/A will run around 4-4.5psi boost with the stock pulley while Daves EJ25 will be around 3psi. But by adding a smaller pulley you can increase the boost. The benefit of a supercharger over a turbo is that a supercharger you don't have to wait for it to spool up, you get instant power from idle.
The torque increase is massive unlike a turbo with a smaller Kw increase than a turbo.... Perfect for offroad. Plus having the ability to turn it on or off means you can have fuel economy when you want or the extra power!
The cost will likely be around $750 to do all this and we will probably do it on both vehicles.
It should be a fun little project and I will be keeping this updated.
Im hoping this will be done by the end of next week
After reading up about it and talking to Raptor Chargers (they do kits for Subaru's both N/A and turbo aswell as other vehicles), Subarino (Ausubaru - Supercharged his old EJ22 N/A L-Series Hatch), a few guys on Ozfoz along with a couple of commodore (Holden) forums it doesn't seem too much invloved.
The Charger: SC14 Toyota supercharger which they ran on the Supra
Whats Invloved: If boost is kept low (below 5psi) then an ECU piggy back, intercooler and fuel system upgrades are not neccessary on an N/A EJ20,22 or 25. Since these engines are still only OBD I (until around 2005 I think it went OBD II in Australia) then it isn't hard to trick the ECU into running properly with the charger aslong as too much pressure and force aren't put on the engine. It needs to be kept within stock limits.
So in reality its pretty much bolting the charger on after making a bracket to fit in the engine bay, run some simple wiring and piping for the air intake and power, the pulley system needs to be lined up and a V-belt installed.
Parts:
- SC14 charger (includes the stock pulley)
- cheap ebay BOV (Blow off valve to allow air to vent when the manifold butterfly is closed) - I think that's the correct term...
- a V-belt to run between the charger, crank pulley and possibly A/C unit
- Air intake piping
- a steel bracket welded up to support the S/C
- Some simple power wiring and a dash switch to turn it on or off like your A/C compressor - This can only be done with certain types of S/C
- Pod filter
There will of course be small extra things but thats the majority of it from my understanding.
My EJ20 N/A will run around 4-4.5psi boost with the stock pulley while Daves EJ25 will be around 3psi. But by adding a smaller pulley you can increase the boost. The benefit of a supercharger over a turbo is that a supercharger you don't have to wait for it to spool up, you get instant power from idle.
The torque increase is massive unlike a turbo with a smaller Kw increase than a turbo.... Perfect for offroad. Plus having the ability to turn it on or off means you can have fuel economy when you want or the extra power!
The cost will likely be around $750 to do all this and we will probably do it on both vehicles.
It should be a fun little project and I will be keeping this updated.
Im hoping this will be done by the end of next week
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:lol:
) then only go with SARD regulators. They are the best on the market, just be careful no to purchase from anyone dodgy because you'll get a fake reg in a SARD box.
