Larz

I just installed an HKS downpipe. My only other mod is an apexi intake. I'm hearing a whining sound from the lower (closest to the side of the car) intake cone. This one was not removed during the installation of the downpipe. There is no leak at either end of the downpipe. So what makes the noise? The car is running fine, otherwise.

satoacs

what kind of whining

Larz

It's not that loud, but it's high pitched.

95R2-89TII Ground Zero

Turbo spool??? Or is it at idle??

scratchjunkie

since you installed a downpipe you may be hearing the turbo. does the whining noise sound like a vaccum cleaner on steroids?

Larz

I can only hear it at idle. The sucking of the intake drowns it out when any throttle is applied.

jayk

Does the pitch of the whine change with rpm? I have a high pitched whistle type noise after 4500k rpms that I've never been able to cure.

jayk

Never mind, cross postings.

satoacs

there could be a little hole in the intake somewhere
my best advise: when you hear the noise get out and pop the hood, itll be easier to find

Larz

I did pop the hood. That's how I was able to narrow it down to the intake.

satoacs

oh ok, thendid you stick you hand on it to feel if there was a hole, or put your ear up to it?
if theres no hole, then it could also be an internal component rubbing or have a bad bearing.