blow off noise without blow off valve ?

[karatekutya10]

Hi All!

Just bought my first fiesta a couple a days ago, all Stock except montune box+hose, so just noticed when im revving a bit (2500-3000rpm) hearing some blow off noise , also when im accelerate and let it off hear some chirp and blow off previous owner says there is no blow off valve fitted , so my question is can the montune box cause this kinda sound ? or anyting

Thank You

 

[the duke]

Your car has an OEM bypass valve. It will make noises as it vents the excess pressurized air (Boost). It vents back into the OEM intake tract so it's not as loud as venting into the atmosphere. Pretty much any forced indcution system needs a bypass valve/pop-off valve/blow-off valve to function correctly.

Your Mountune Airbox has a secondary hole/airfeed and will be more audible for it.

 

[awsomeeye]

Hi All!

Just bought my first fiesta a couple a days ago, all Stock except montune box+hose, so just noticed when im revving a bit (2500-3000rpm) hearing some blow off noise , also when im accelerate and let it off hear some chirp and blow off previous owner says there is no blow off valve fitted , so my question is can the montune box cause this kinda sound ? or anyting

Thank You

have the same setup. mountune air box w/ hose and a drop in filter. get crazy bov noises.

 

[karatekutya10]

Your car has an OEM bypass valve. It will make noises as it vents the excess pressurized air (Boost). It vents back into the OEM intake tract so it's not as loud as venting into the atmosphere. Pretty much any forced indcution system needs a bypass valve/pop-off valve/blow-off valve to function correctly.

Your Mountune Airbox has a secondary hole/airfeed and will be more audible for it.

Thank you !

 

[karatekutya10]

have the same setup. mountune air box w/ hose and a drop in filter. get crazy bov noises.

Thanks ! yeah a bit crazy

 

[Yamaha926]

My car all of a sudden started to blow off all loud and turns out all 3 bolts of the turbo inlet pipe were gone...fell off