Engine/Transmission (1998.5 - 2002) New 4" straight pipe

[NCoulter]

I just installed a 4" Rip Rooks exhaust. It sounds good at idle and at upper rpms, but when I shift while under load it has a nasty sssskkkkkkk sound. I think its the turbo unspooling but I wouldn't think it would sound this bad. I love the straight pipe other than that. I was wondering if you guys to tell whats wrong or is this normal?

 

[RJPotts]

Does this sound you're describing sound like forced air?

It is likely the turbo, and if its the sound I'm thinking it is, that is a GOOOOOD sound. You'll learn to love it. If not, I dunno.

-R. J.

 

[CHolman]

It's just your motor saying thank you for cooling off your EGT's and letting it breath better... My motor purrs through my dual 5" stacks...

 

[tURBOdIEZEl]

it sounds like the turbo is just letting off... . gotta love the sound of a straight piped cummins... . give it some time, after a while thats all you'll wanna hear it scares the ricers away. LOL

 

[JFitzgerald]

Just the turbo talking to you. It's a good sound. The "sssskkkkkkk" you describe makes me think of what mine sounds like with the exhaust brake on.

If you shut it down somewhere quiet, you can hear the turbo spool down through the exhaust too.

 

[NCoulter]

My dad says its sounds like an old man with asthma. But I guess thats what is supposed to sound like. Thanks fellas

 

[tURBOdIEZEl]

If you shut it down somewhere quiet, you can hear the turbo spool down through the exhaust too.

i love doing that. LOL. i turn the truck off and stand beside one of my stacks..... sounds kinda cool... .

 

[JFitzgerald]

I notice mine when I pull in the barn at home. It echos off the wall next to the pipe.