Hissing sound

[MCampbell]

If I accelerate to about 30 mph. And then slow down I get a hissing sound or a sigh from around the turbo. I never hear this sound unless I am going slow. Is this normal?





mike

 

[SEmerson]

yes it is normal. If you remove the fender boot to the air box you will hear it more too

 

[Joe Mc]

Don't forget to toss the silencer ring while you're at it

 

[DarrellB]

If I take the silencer ring out how loud will it be. I will be going to the BHAF when it come in and want to know if it will run me out of the cab. I already have a strait exhaust but do alot of long distance haul and don't want it too loud in the cab.



Thanks

Big D

 

[SEmerson]

The whisle sound will be alot louder. but it is easy to put back in if it is too loud. Mine is out and a straight pipe would be too loud for me.

 

[MCampbell]

Thanks for all of the info. I kept looking for a loose connection but couldn't find one. So it's great to hear that it is normal.





mike

 

[hammong]

I took mine out for a week or two, then put it back in. The turbo was "obnoxiously loud" with a K&N filter and my airbox fender boot removed. I especially noticed it when I upgraded my injectors to DD Stage II's and added the boost module. Under 17psi stock, it wasn't too bad. At 25-30 PSI it sounds like a small child screaming for his mommy.



Greg