MRT for performance car parts and servicing

Get FREE Freight & LIFETIME Warranty Now

or search
View Cart

Power upgrade guide for normally aspirated Subaru engines

We get many calls for upgrades on this model, as a guide to assist you we have created this list to save your time, guarantee your money is invested correctly and most of all give you maximum value!.

ECU
Can not be reflashed or tuned for any improvement, zero value here, ECU is a old design and inherently allows no improvement. 

INTERCEPTOR OPTION
Unless you have MASSIVE mods, and or a custom build engine the same applies to ECU above.
ZERO VALUE

NEW ECU
As the engine is relatively high comp, there iss very little to gain here. OK if you want to invest over $3000 in a motec or similar ECU then you will get some advantages, but frankly, for this $$ you are better investing it elsewhere! 

EXHAUST
Engine pipe with long secondary pipes to add torque is the only value, 5 - 15 kw and up to 50 Nm can be gained, with the correct complete design.
WRX systems barely fit and only reduce back pressure and engine response with no increase in power.
A free flowing exhaust from cat back will sound louder but add no power. 

AIR INTAKE
Other than a horrible intake noise no power here either.
MRT used to supply and fit ram pod style intakes, but with technology and recent testing and on the later models these were made  redundant
A replacement panel filter in the std airbox will save on future servicing but give no power improvement.

ENGINE ANCILLIARIES
Items such as aftermarket plug leads, high capacity discharge ignition systems etc all will ad very marginal if any improvement.

INJECTORS
Bigger injectors empty your wallet and add no power. Save your $$ for suspension and get some GOOD improvements.  

TURBO
OK if you have big bucks a turbo upgrade will add power, but really, why not just buy a WRX!
To turbo the NA engine you need a minimum $7000 to do a half decent job and still its not where near like a WRX
Internal engine mods are then needed for reliability.

ENGINE INTERNAL
OK like above if you have wads of cash, thena  rebuild will give some benefits, but a rebuild will cost over $5k and then you need to choose carefully. 

OTHER OPTIONS
Is the car serviced correctly because often a service by a workshop who really knows subarus will be your best place for power.

IE:

  • Upper engine cleaner and in tank fuel additive. (when was this last done, its a subaru suggested option).
  • Good quality low friction engine oil such as Mobil 5 w 30 will give around 5 kw and better fuel economy over a non synthetic oil.
  • Fuel system service, MRT offer this and often get good results, cleans the EGR "gunk" out of the intake and combustion area. Also injectors as well as inlet manf and exhaust as well as fuel pump, lines and sensors.
  • Synthetic trans and diff oil, again like engine oil this adds up in benefits.
  • Timing belt, fuel filter are again areas that should be checked and renewed.

SUSPENSION
check out the performance / suspension section for REAL gains and benefits.
If I owned a NA suby, I would invest my budget in brakes and suspension as this is guaranteed BEST VALUE!
more here http://mrtperformance.com.au/performance/suspension 

FREE CHECK
Refer the MRT vehicle service section here and take advantage of our free 78 point check to ensure your car is in top shape!

Select Tune Level

EcuTek

  •  Want More Power?
  •  Want More Torque?
Find out why your Mitsubishi, Subaru, Mazda car is detuned by the factory Learn More ECU

MRT Big Brake Kit

DBA

White Line

Forgot your Username or Password?