VGT or Not

[kleiny72]

Hey guys, I have a 2005 F350 Dually 6.0L. I am going to replace the turbo. Which is better or what are the pros and cons of VGT turbos and Non-VGT turbos? thanks all

[smokersteve]

Well if you buy the same size turbo non vgt it will be slow to respond and wont have as much power as the stock because the veins can concentrate the exhaust more. The stock can act as a small turbo that can spool up fast and produce power from a big turbo at the same time.

[stroken04]

Originally Posted by kleiny72

Hey guys, I have a 2005 F350 Dually 6.0L. I am going to replace the turbo. Which is better or what are the pros and cons of VGT turbos and Non-VGT turbos? thanks all

They both have their advantages and disadvantages.
What mods do you have on the truck?
What are you using your truck for?

[RescueF250]

Im running a Non VGT, currently a 64mm Turbo. Tuning is the biggest issue with them. There is a dead spot on them between 40 to 50 mph. If the turbo is sized correctly it will spool just fine. I can see about 30psi boost at just half throttle.

[FastFocus]

i personally will be getting rid of the VGT turbo when i replace mine. I would like to have a turbo that isnt in boost while driving down the interstate, that can only save MPG. On my turbo gasser when i installed a larger turbo that wont show any boost at highway speeds unless you give her some throttle, i got about 100 miles more per tank along with tuning of course also...

not to hijack this thread, but how is towing with these non VGT turbos? thats the main use of my truck but when i'm not towing i want something fun too.

[kleiny72]

Originally Posted by stroken04

They both have their advantages and disadvantages.
What mods do you have on the truck?
What are you using your truck for?

I am running an edge juice with attitude monitor but going to get a SCT Livewire soon. i have 5 in stacks and an AFE stage 1 intake. i am thinking of an Auroa 4000 from ATS and an EGR delter kit from Elite diesel. ARP studs when i do the EGR delete. I aint looking for huge power now but 500-600 hp would be nice. I tow a stock trailer and use it as a daily driver.

[tex25025]

Originally Posted by RescueF250

There is a dead spot on them between 40 to 50 mph.

I don't know where you are getting that dead spot issue from. I have the same size turbo and I'm willing to bet yours is also from RCD. I have a size smaller on injectors and I don't have a dead spot.

Originally Posted by RescueF250

I can see about 30psi boost at just half throttle.

Ok, I think it might be the tuning. I can almost hit 40 at half throttle on the new Hybrid Race tune that Matt sent over to me.

Originally Posted by FastFocus

I would like to have a turbo that isnt in boost while driving down the interstate, that can only save MPG.

If you want to think that, then more power to you.

Originally Posted by kleiny72

I aint looking for huge power now but 500-600 hp would be nice.

You are going to have to upgrade the injectors as well. I have 150s and a 64mm turbo and I'm just at 508hp. You might be pushing more air into the engine, but without fuel to mix in with it, it's not going to do a whole lotta good. You might be able to compensate a little more with over fueling beyond what you already have in your tuning, but that's going to tax the stock injectors and make dead-heading more of a reality.

I would also do a Fuel Regulated Return as well, speaking of dead-heading and preserving either your stock or a/m injectors.

Originally Posted by kleiny72

I tow a stock trailer and use it as a daily driver.

I wouldn't go beyond a 64mm turbo and Stage 2(usually 190mm^3) injectors particularly if you are going to be hauling live cargo. You could go a size higher on each if it was just a daily driver, but any higher then that you lose quite a lot of street manners.

[FastFocus]

Originally Posted by tex25025

If you want to think that, then more power to you.

Well this is going off the turbo gasser world, i'm still new to the whole diesel world and am learning as i go. with gassers the more air being shoved into the motor the more fuel is going in also... If i'm wrong i'm wrong, no big deal.

[tex25025]

Originally Posted by FastFocus

Well this is going off the turbo gasser world,

To help you out, don't go by what you know from the gas world. There are quite a few things that don't translate between gassers and diesels.

[JoshDavis]

The 62 to 64 NON vgt`s work well but require someone to tweak the tune of the truck to work properly. Kevin have you got an updated tune yet? I plan on sending a few out tomorrow to some guys to try. (It works really well)