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#SUBARU GC8 MODS INSTALL#
#SUBARU GC8 MODS DRIVER#
#SUBARU GC8 MODS MODS#

The whole point of a turbocharger is to push more air into the engine. This will allow 50% of the unused boost to recirculate back into the intake, and 50% of the unused boost will vent to the atmosphere. For moderate boost levels, a 50/50 bypass valve is a good choice. If you plan on running high boost levels, then a blow-off valve is a good choice.

It should be noted that changing to a blow-off valve can hurt throttle response, especially if you have a larger turbocharger. Upgrading to a blow-off valve will give you that iconic “psh” noise and a blow-off valve can also flow more air than a BPV (important for high-horsepower builds).

OEM valve can prove unreliable and leak.

This modification is even more important if you’re using an aftermarket turbocharger or an upgraded OEM turbocharger. The stock BPV may also not be able to flow enough air to let all the unused boost recirculate. If you want to avoid boost leaks or BPV failure, an upgraded bypass valve or blow-off valve is a great modification, especially if you’re still using the stock turbocharger. Unfortunately, the stock valve can leak at high boost levels, causing your WRX/STI to run poorly and ultimately make less power than it should. Without a bypass valve, boost pressure will spike when the throttle closes and cause your pipes to blow off. This valve recirculates unused boost pressure when the throttle body is closed back into the intake. The problem with increasing the boost is running into the limitation of the stock bypass valve/diverter valve. For this reason, many WRX owners choose to stick with the stock turbocharger for as long as possible and increase the boost through tuning or an aftermarket boost controller.

#SUBARU GC8 MODS INSTALL#

Simply install it and forget about it!Īlthough a larger turbocharger is an awesome mod, it’s fairly expensive. If you want to improve the longevity of your WRX/STI and reduce oil consumption, an aftermarket air/oil separate is an absolute must-have modification! An AOS will automatically drain clean, separated oil back into your vehicle’s engine without any maintenance required whatsoever.

Increase fuel octane by reducing fuel dilution with oil.

Some AOS systems automatically drain this oil back into your engine, eliminating the need to drain the catch-can manually. Once separated, the oil collects in a catch-can will need to be put back into the engine. The job of your AOS is to separate oil from your ventilation air and stop it from passing into your intake system. AOS systems work by using centrifugal force to separate engine oil vapor from ventilation air. Luckily, this entire problem can be solved with an aftermarket air/oil separator, also known as an AOS. On top of that, excessive oil in the intake system increases the chance of engine knock and effectively reduces fuel octane, while also caking oil on the inside of your engine.

Without an aftermarket air/oil separator, your oil level will slowly decrease.

Oil in your engine ventilation system is caused by excessive blow-by. Realistically, nearly all engines suffer from this issue, however, turbocharged engines are especially bad with this problem. One of the major problems the WRX/STI faces is excessive oil in the engine ventilation system. All of these eventually tie together to give you improved performance and a much more enjoyable driving experience. This includes everything from underhood upgrades to suspension tweaks and better tires.

#SUBARU GC8 MODS MODS#

In the short guide that follows, we are going to cover some of the best mods you can do to your WRX or STI to truly take it to the next level and get the most out of it. Just like pretty much every car, there are a number of modifications that can make the Subaru WRX much better than it was when it left the factory.

#SUBARU GC8 MODS DRIVER#

Some of the reasons for the WRX having such a devoted fan base include the car’s all-wheel-drive reliability, affordable performance, safety features, and overall comfort levels as both a daily driver and a more spirited track car. The WRX wasn’t always super popular, though but if you fast forward to today, the Subaru WRX is an extremely sought-after car among automotive enthusiasts. The technology used in their rally cars trickled down to the Impreza WRX, which is what made it such a successful road car. As you may already know, Subaru has made a massive name for themselves in the world of rally racing.