Garrett VGT on a 12v

not POSITIVE but think the 6.0 turbo is around a 60-62mm.

The '03 turbo were better spooling and made more power than the '04 and up because the difference in number of vanes on the turbine side. THe '03 had 10 vanes and the '04 and up had 12 vanes.
'03 turbos make more boost, spool faster, and sound a helll of a lot better.

Lance
 
bmoeller said:
Not dumping EGR crap through it on a 12v. :D Less junk to stick the vanes.
Click to expand...

Exactly right..

When you're not pushing coolant through the exhaust they run much better. :doh: The vane sticking problems are nearly non existant on the dmax VNT's which are identical designs.
 
Not sure where you get your info. Stock wheels are around a 56mm (that is why II offers a stage I with a 62mm wheel).

03's do not out flow 04 and newer chargers. They have a different turbine wheel but they will not outflow. There is actually a late change in 04 that seems to lay down slightly more horsepower but for the most part, they all are the same.

03's are sought after for their boost whistle, not because of the power.
 
Trusted said:
Have you looked at your backpressure?

I know on the 6.0's these have pretty high back pressure and in a compound setup they start throwing parts. I'm curious if yours has the same issues or not.
Click to expand...

Backpressure is tuning dependent. If the VNT is tuned correctly you can get nearly 1:1 at 30-35psi on a stock AVNT3782 which Joe has. And those pressure numbers are based on our experience with the VNT's on the V8 trucks. The boost numbers will most likely go up on the Cummins engine because they don't flow as well through the head, and also are a lower displacement, which will ultimately read as a higher gauge pressure even though the delivered volume through the charger is the same.


Forrest, Joe has the same controller you have. The HE351 controller is a different module.
 
Brayden @ FPE said:
Backpressure is tuning dependent. If the VNT is tuned correctly you can get nearly 1:1 at 30-35psi on a stock AVNT3782 which Joe has. And those pressure numbers are based on our experience with the VNT's on the V8 trucks. The boost numbers will most likely go up on the Cummins engine because they don't flow as well through the head, and also are a lower displacement, which will ultimately read as a higher gauge pressure even though the delivered volume through the charger is the same.


Forrest, Joe has the same controller you have. The HE351 controller is a different module.
Click to expand...

Look, I don't want to get into a pissing contest. I like your stuff for the Duramaxes, but on the 6.0's, I have yet to see anything close to a 1 to , especially at 35 psi. We basically just sepent 100k designing a new turbine housing for a reason. And it wasn't because boost and drive pressure were 1 to 1 at 35psi.

Below is an average pass at the track (We have quite a few much worse than this). You tell me where 1 to 1 is.

Boost Drive Ratio
4.1, 20.4, 4.975609756
5.1, 24.8, 4.862745098
6.1, 27.4, 4.491803279
9.7, 32.5, 3.350515464
11.2, 36.3, 3.241071429
19.9, 48.4, 2.432160804
23.4, 45.2, 1.931623932
26, 46.5, 1.788461538
26, 42, 1.615384615
24.4, 41.4, 1.696721311
24.4, 43.3, 1.774590164
24.4, 42, 1.721311475
23.9, 42.6, 1.782426778
23.9, 43.3, 1.811715481
23.4, 45.2, 1.931623932
23.4, 49, 2.094017094
23.4, 48.4, 2.068376068
22.9, 49, 2.139737991
22.9, 53.5, 2.336244541
22.9, 50.3, 2.19650655
22.9, 48.4, 2.113537118
26, 39.5, 1.519230769
24.9, 45.8, 1.83935743
24.9, 43.3, 1.738955823
24.4, 45.8, 1.87704918
24.4, 46.5, 1.905737705
24.4, 48.4, 1.983606557
24.4, 51.5, 2.110655738
23.9, 49, 2.050209205
24.4, 52.8, 2.163934426
23.9, 50.3, 2.10460251
24.4, 53.5, 2.192622951
24.4, 54.7, 2.241803279
23.9, 53.5, 2.238493724
23.9, 52.8, 2.209205021
24.9, 44.5, 1.787148594
27, 45.2, 1.674074074
27.5, 43.3, 1.574545455
27, 43.9, 1.625925926
27.5, 42, 1.527272727
27.5, 38.8, 1.410909091
28, 37.5, 1.339285714
28, 37.5, 1.339285714
28, 37.5, 1.339285714
28, 40.1, 1.432142857
28, 42.6, 1.521428571
27.5, 38.8, 1.410909091
28, 36.3, 1.296428571


Brayden @ FPE said:
Exactly right..

When you're not pushing coolant through the exhaust they run much better. :doh: The vane sticking problems are nearly non existant on the dmax VNT's which are identical designs.
Click to expand...

Identical designs? Really? The vanes and unison (sp?) ring is the same and all that good stuff?
 
Yes... The 6.0L vane is the same as the LBZ vane.. The unison ring will interchange..

Timing raises drive pressure.... Tuning makes everyone's DP's different.

Compressor load from $hitty 6.0L heads increase turbine demand (drive pressure increases)... There are ton's of variables.

If you spent 100K on a VNT housing then I wish I had your money :) I'd burn mine.
 
Can you repost that data with the vane angles as well? Not pissing here.. just would like to see it.

Your data tells a good story there. Tip in drive is always higher on a VNT than a fixed geometry charger, but you can see around 30 psi it's leveling off. Is the vane angle below 30% at your last data point?
 
:D That is Correct :D

Can't get something for nothing.. quick spoolup yields high drive pressures down low.
 
Brayden @ FPE said:
Can you repost that data with the vane angles as well? Not pissing here.. just would like to see it.

Your data tells a good story there. Tip in drive is always higher on a VNT than a fixed geometry charger, but you can see around 30 psi it's leveling off. Is the vane angle below 30% at your last data point?
Click to expand...


As I'm sure you know, The 6.0 Chargers don't have a vane position sensor like the duramax chargers do. So, our datalogger has no way of monitoring it. From or testing, pressures starts to climb after 28. That seems to be the leveling point.

For the record, the housing is for a non-vgt, direct bolt in replacement due to the problems and issues the 6.0's have. (below is a photo of the first housing poured Wednesday.)

Trusted_Performance_First_Cast.jpg
 
Does the 6.0L software handle the vane tables in percentage or duty cycle?... didn't know if you could plot desired vane angle or duty cycle.

Looks like it will be a good product. :clap:
 
Brayden @ FPE said:
Does the 6.0L software handle the vane tables in percentage or duty cycle?... didn't know if you could plot desired vane angle or duty cycle.

Looks like it will be a good product. :clap:
Click to expand...



We do not program inhouse. In addition to that, the 6.0's don't have a way to verify the actual position of the vanes. So, duty cycle may be 60% but actual position may be closer to where it would be at say 50 or 55.
 
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