It’s aggressive on boost, has a lot of rev hang, runs lean, and overall isn’t very friendly to performance mods. The stock factory tune on the WRX isn’t great. This means you have about 100whp of play before you start entering dangerous territory for the FA20DIT connecting rods. Without E85 fueling you will probably be around the 320whp and 330wtq mark. A stock WRX will dyno in the 220-230whp and 240-250wtq range. Electronic Boost Control Solenoid (EBCS)Īll of the mods listed here will get you in the 340-350whp and 350-360wtq range.J-Pipe / Downpipe (recommended new EBCS).The key to hitting power levels like these while maintaining reliability is all in the tuning. So, the FA20DIT does have a bit more power potential in it than we claim above. They claim the engine was pushing over 380whp for over a year with zero issue. Ng did push 452whp and 414wtq (mustang dyno) on a completely stock engine and turbo. Don’t push the boost above 22psi and use a tune that limits low-end torque. The key to preventing FA20DIT rod failure is to keep boost low and run a conservative tune.
#BEST ETUNES MOD#
However, failure at levels even as low as 300whp aren’t uncommon so keep this in mind as you mod your WRX. If you are looking to make 350+whp then we recommend upgrading your internals. These WRX internal engine problems put a damper into performance potential. Rod and piston failures also usually take the whole engine out with them, requiring a new engine. Piston failure is also common along with connecting rod failure. With respect to horsepower levels, the rods commonly fail within the 320-350whp range. of torque is when connecting rod failure becomes a concern. Too much low-end torque tends to be the cause of connecting rod failure on the WRX. One big downside of the WRX is that the FA20DIT has weak connecting rods.
#BEST ETUNES UPGRADE#
Looking for suspension mods? Checkout our WRX Coilover Upgrade Guide.īefore we dive into the best mods, we need to discuss power limits. This guide will cover the 6 best WRX mods and show you how these simple bolt-on upgrades can add up to 100whp of power gains. of torque in the base models.įortunately, the WRX and the FA20DIT engine can easily produce 300+whp with a few simple bolt-on modifications.
The STI and its EJ257 engine produce 300-310hp and 290-300lb-ft. The STI is powered by the larger EJ257 engine, a 2.5L turbocharged flat-four with sequential multiport fuel injection. However, the WRX is often overshadowed by its bigger brother, the WRX STI. of torque, the small engine outputs a decent amount of power for its size. The FA20F, also commonly referred to as the FA20DIT, is a direct injected 2.0L flat-four twin-scroll turbo engine. 2015-2021 Subaru WRX cars under the VA chassis code are equipped with the FA20F engine.
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