Mazda3 Forums banner
1 - 3 of 3 Posts

· Registered
Joined
·
251 Posts
The turbo "sounds" are either the turbo spooling, external wastegate dumping to atmosphere, or the blow off valve letting off air.

Since we have internal wastegates, you will only be able to hear 2 of them.

To hear the turbo spool more, you'd buy an aftermarket intake or filter. A bov that is not plastic (like our stock one) will help with the blow off noise, even recirculated back into the intake will make some noise.

Anything not stock that causes a problem will void the warranty. You can buy a Mazdaspeed intake for the MS3 soon but its not available yet.

Hope this helps.
 

· Registered
Joined
·
251 Posts
BOV is very slim that it would cause problems if it was routed back into the intake tract...however Mazda techs can really make a good story and link a problem to the bov if determined enough.

CAI from Mazdaspeed would be best installed by the dealer to fully ensure no problems with warranty. I can install it myself no problem, but I'd rather have any issues not be on my head but rather on the dealership should any arise.
 

· Registered
Joined
·
251 Posts
[quote author=speed3wannabe link=topic=66567.msg1149853#msg1149853 date=1168830893]
I may be wrong but I think it is pretty important to get a BOV that recirculates. I've noticed that the ECU is quick to set off a CEL and getting a BOV that vents completely to the atmosphere would probably not only make your car not run well but would almost definately set off the CEL. You may not get as loud off a WHOOSH that your looking for but your car will run a butt load better with a BOV that recirculates.
[/quote]

Yes you're right that it's important to get a BOV that recirc.

Cars with MAF setups usually (if not always) run better with the BOV recirc. due to the fact that when you vent, you're messing up the airflow readings but dumping metered air. This causes the car to run overly rich between shifts and can lead to poor gas mileage and in some cases stalling out. If the BOV doesnt have a tight enough spring or have a push pull type system like an HKS, more often than not they die out.

To avoid this, the "REAL" way to vent is to get an EMS, MAF translator of some sort, or run Vein Pressure Control/Map.
 
1 - 3 of 3 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Top