friend has a f350 powerjoke, and it whistles like crazy even at idle, hes got a chip intake exahst and i dont know what else. why is his turbo goin crazy at idle or why does it sound like it is?

 

every powerstroke I've past has a really high turbo whistle, it sounds different than any CTD i've heard, not sure if his is normal or ur probably just use to the CTD...

 

Get an Afe stage II intake or make the whilly's whistler and you'll be whistling right next to him!!!

Shane

 

I believe they use a variable geometry turbo that acts like a small housing under no/low boost conditions. Small housing=turbo rotating faster=more sound.


I think.

 

They are also ball bearing VG turbo's I believe...the 03's had the best whistle of them all, but...thats about all they have to offer!

 

Very True!!!!!!!!!!!

 

it's the VGT turbo, and nothing will make a cummins sound like that except a VGT

 

I thought it was a VVT (Variable Vane Turbo). As far as I know Holset is the only one that makes the VGT (Variable Geometry Turbo) for the new 6.7.

 

VVT, VNT, VGT... whatever... it whistles

 

i always thought that was the owner whistling a happy little tune to himself because he thinks he bought a better truck considering Ford owns cummins and Ford won't put that crappy motor in their truck...

 

I think it is either a 03 or 04 Powerstroke, but with a exhaust and intake, it is THE loudest turbo I have ever heard. Something about just that one year, it has 7 fins, I think, that makes it that loud. Many Powerstroke owners have switched because they like the sound so much

 

My dad's 6.0 had a 5inch exhaust on it, the whistle was very loud.

 

The Powerstroke has the variable vane turbo's. The vanes change their pitch. The Cummins has the variable geometry turbo, where the dimensions of the exhaust housing change.

 

I personally see VVT's and VNT's (and whatever other fancy acronyms the manufacturer want's to use) as falling under one larger category of VGT's, but that's just my opinion.

Or, we could just call them "fancy whistling turbos".

 

Apparently we just aren't as lucky...

*hangs head*