Strange "LOW" noise at 3000rpm, droning?
03-09-13, 04:32 PM
#1
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Strange "LOW" noise at 3000rpm, droning?
Ok i have a 2001 Rx7
The car start and run perfect cold and hot, no flooding problem and other stuff
When i push gas around 3000-3500 rpm i ear a big "Bwhoooooom" for around 1/2 second (half) after this nothing strange happen.
Previous owned (in japan) istall a damn Big exaust (i can make photo if you need).
Do you have any idea to remove or reduce intensity of this noise? A silencer in terminal? other stuff? (withoud buy a new exaust)
Thank you.
PS Engine is stock except for aftermarket filters
The car start and run perfect cold and hot, no flooding problem and other stuff
When i push gas around 3000-3500 rpm i ear a big "Bwhoooooom" for around 1/2 second (half) after this nothing strange happen.
Previous owned (in japan) istall a damn Big exaust (i can make photo if you need).
Do you have any idea to remove or reduce intensity of this noise? A silencer in terminal? other stuff? (withoud buy a new exaust)
Thank you.
PS Engine is stock except for aftermarket filters
Last edited by Evil_Sephiroth; 03-09-13 at 04:36 PM.
03-09-13, 04:51 PM
#2
sure, put the stock airbox back in. the sound is probably your smog pump venting into the open intake just before it shuts down at 3k.
a less likely issue is within the turbos themselves, a stuck open charge pipe butterfly will force secondary turbo pressure out the primary turbo and out the intake before the twins actuate together at 3500-4k.
but the smog pump is quite noisy on open intake cars. generally the smog pump sounds like a "moooo"(cow).
a less likely issue is within the turbos themselves, a stuck open charge pipe butterfly will force secondary turbo pressure out the primary turbo and out the intake before the twins actuate together at 3500-4k.
but the smog pump is quite noisy on open intake cars. generally the smog pump sounds like a "moooo"(cow).
Last edited by RotaryEvolution; 03-09-13 at 04:54 PM.
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