Does an AOS add horsepower?
If you have a direct injection engine, you should have an AOS. When you go bigger on horsepower, you should have a quality AOS. Even if your vehicle is otherwise stock, and AOS can greatly improve performance and economy over time.
Do you need a tune for AOS STI?
You do not need a tune for an AOS.
Is the IAG AOS CARB legal?
According to the BAR who runs the smog program, an AOS is legal as long as all of the routing is the same as stock. According to CARB, these devices don’t require an EO from a Smog Check perspective as long as they remain a sealed system.
Should I get an oil separator?
You may have heard that an oil separator should be one of the first mods to get for your Mustang. And more often than not, that’s completely true. Oil separators, or catch cans, can prevent potential oil buildup in the intake manifold of direct-injected engines.
Does air oil Separator increase horsepower?
Air Oil Separators do not in and of themselves increase horsepower. However, a well-functioning PCV system increases horsepower, and an Air Oil Separator helps your PCV system run efficiently.
What is the difference between an air oil separator and a catch can?
The major difference is that the AOS separated air and oil and let the oil drip back to the oil pan while the catch can traps oil in a can. This is because air oil separators have more baffles than the oil catch can. When using an oil catch can you will need to empty the captured oil regularly.
How does GrimmSpeed AOS work?
The GrimmSpeed™ Air/Oil Separator for Subaru vehicles has a unique design that allows you to maintain your PCV Valve while separating the oil out of the crankcase and head ventilation air! Our AOS will allow your engine to run more efficiently due to the separation of oil from the intake system.
Do you need tune after Catback exhaust STI?
Only when you do a downpipe + catback is when a tune is necessary. For now, you’re fine.
What happens if you don’t tune your car?
Naturally, your vehicle should travel straight if not being steered. If it doesn’t, it means your wheels are out of alignment, which is bad for your fuel economy, as well as your ability to handle the vehicle. Wheel alignments are traditionally covered in vehicle tune-ups, so get this problem fixed as soon as possible.
Can you pass smog with a catch can?
Unfortunately, installing an oil catch can will cause your vehicle to fail the smog inspection. The smog technician will have to identify your vehicle as having a modified PCV (positive crankcase ventilation) system.
Are catch cans CARB legal?
Registered. If you review the Aftermarket Parts Verification Table in Appendix G of the BAR Smog Check Manual, it states that an “Oil Separator/Filter – Crankcase Gas Filter” (i.e. catch can) is exempt from verification for a CARB EO number.
Which AOS for Subaru WRX/STI’s?
Either the Crawford or Perrin AOS would be ideal for track driven or highly-modified, high boost Subaru WRX/STi’s. While the Moroso separator is a step above the GrimmSpeed unit, it is not water heated, making it a bad choice for people living in cold-weather locations due to the risk of condensation.
What is the difference between competition and Street series AOS?
The Competition Series AOS prevents any oil suspended in the PCV gases from re-entering the turbo inlet but requires calibration or tune changes. Select a Street Series AOS if you prefer not to retune your Competition vehicle for this upgrade.
Which AOS should I choose for my competition vehicle?
IAG recommends the Competition Series AOS for Competition vehicles with greater than 600 WHP output. The Competition Series AOS prevents any oil suspended in the PCV gases from re-entering the turbo inlet but requires calibration or tune changes. Select a Street Series AOS if you prefer not to retune your Competition vehicle for this upgrade.
What is the street series AOS PCV?
The Street Series AOS maintains the OEM PCV system functionality, but supplements its capacity. The Street Series AOS PCV discharge gasses return to the turbo inlet, retaining a PCV valve to draw additional suction, improving air oil separation.