Just Bein' Curious

[Brody133]

Now, I've heard the 03 year on the 6.0 was a really good year for the turbo. I've heard it, and I assumed it would be, but what was it that they did different in 03 compared to the other years? I'm not gonna do the 03 turbo swap but I was just wonderin' why everybody likes the 03 turbo year?

the 03 turbo has less exhaust turbine fins on it so it whistles louder... some have also said there is a slight power increase with the 03 turbo over 04-07 turbos

[stroken04]

It only has 10 veins in the turbo, that is where the awesome sound comes from
FYI: 04's have 12 veins and 05-07's have 15 veins

[storkerlovr]

interesting, i have also wondered the same thing

[stroken04]

Originally Posted by wriott

the 03 turbo has less exhaust turbine fins on it so it whistles louder... some have also said there is a slight power increase with the 03 turbo over 04-07 turbos

I have heard that before, but Im not sure if I believe it or not.
I would really like to see some before and after dyno sheets of an 03 turbo swap

[storkerlovr]

Originally Posted by stroken04

It only has 10 veins in the turbo, that is where the awesome sound comes from
FYI: 04's have 12 veins and 05-07's have 15 veins

why did they change them through the years?

[Brody133]

Ah ok! Thanks Wriott. It always seemed to me that the 03 turbo was louder. I thought I mighta just been dreamin' though. I didn't know it had anything to do with the vanes. Now it makes me kinda want to do the swap! lol. If there was a HP increase I'm sure it wouldn't be by too much more.

[TNStroKE]

my truck is an 04 with an 03 turbo and i have to say it is louder than most 04's in my opinion. gotta look out for the hpop on the 03 and 04's though

[Lubbockguy1979]

The 05+ has a improved unison ring and improved turbo drain tune. They are suppost to resist coking and be more reliable than the 03-04 units. I will say that most vgt performance turbos seem to be built around the 10 vane 03 type wheel not sure if that is for the sound or for actual power/cfm gains.

[Ryan Rønning]

They sound great but I don t think they make more power.