i recently saw a lb7 dually...just like mine minus dually. anways...it had a very nice turbo whistle that mine doesnt have. my question is what does that come from tuning a new turbo etc?

 

maybe a lack of muffler?

 

Putting an air intake on could do this. Mine granted not a dually has a loud whisle can really hear the turbo and I have an intake on mine.

 

was it a white cc?

 

i imagine a straight pipe...maybe an intake too?

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funny if it was you!

 

I opened the side of the airbox on my 01. It's a little more whistle, but not a huge amount.

 

an intake thats basically a filter on the end of a metal tube will give ya the most whistle. exhaust wont help.

he could have a different turbo on there as well

 

I put an intake from Bob's Custom Intakes on my '02 and the turbo whistle is now quite loud........

 

I have a AEM intake with the aluminum tube and I have some good turbo whistle but its only really hear from inside the truck, my friend got a bigger down pipe and straight 4inch exaughst and it has some good turbo tunes

 

I tend to want to go with the exhaust post also... The downpipe and lack of muffler seems most likely to me... I know the air box will give some tunes also tho...

I cut my stock air box up... It's about 1/3 the box that it used to be and i get a pumping sound from it but you have to be somewhat close to the truck to hear it...

I also cut the muffler and added a delete pipe and you can def. hear my truck coming - but not soo much the whistle like you saying...

I can't wait to see more thoughts on this thread...