Why do we need Vgt?

[smokedout250]

Okay so I'm bored thinking about turbos. So why is it that wee need a Vgt turbo? Why can't a guy run a standard turbo? Seems like this would work just fine. Granted your gonna loss that boost gain but you wouldn't fight the vanes plugging up. Seems to me there are alot of turbo options out there why is a Vgt a must on a stock 6.0 pls discuss!
Thanks Bryan

 

[MUDSTROKIN']

It isnt a must, plenty of guys running non vgts.

If you use your truck what it's intended for (work) and you keep up with your maintenance the veins shouldn't have any problems

 

[smokedout250]

To me it seems like a twin setup would be a better option than a Vgt. But I get what your saying about te vanes just didn't know if there was a gain by running Vgt vs a non Vgt


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[MUDSTROKIN']

Faster spool up

A non vgt will push more air though

 

[AKHILF]

I'm not trying to be mean but you have over 1100 posts and you've never seen a thread about a nonvgt? There are a couple guys running 62's some 64's and a couple 66's that are on here regularly.

 

[AKHILF]

http://powerstrokearmy.com/forums/showthread.php?t=12813
That was on my second page in this section

 

[smokedout250]

Now I'm not saying on 190s or bigger im talking 155s or stock. I'm trying to grasp why a guy would upgrade to a power max over a standard turbo what makes the Vgt so much better on a stock like truck? Is just the fact that it came on the truck? I'm new to the 6.0 stuff I'm an obs guy.... I'm just trying to learn an discuss options. Other than the fact that you you have a quick spool up and the cleaner emissions what's the purpose of a Vgt?


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[Silverback]

a 62/65/70 would be a good non vgt replacement on a stock truck, tuning is key

 

[smokedout250]

I know it's not cost effective to run something like this when a stock with a batmo wheel or a pmax would be good enuff. Tuning will be the key in any setup like this. Thank you for your input! I'm just trying to find a benefit in the Vgt I can see it being street friendly but why is it that a 7.3 can run very street friendly with out a Vgt? Is the 6.0 more tune able than the 7.3? Sorry for the dragging on just tryin to place everything


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[Silverback]

A big issue with the 6.0 is the heads flow like chit, and the factory intake manifold is very restrictive. Also our style of injection system is pretty outdated. Optimal control of injection timing and good fuel atomization helps spool turbos, something common rail injected engines do better than our HEUI's.

And 7.3s basically spool big turbo's with sheer displacement

 

[Derek@Vision Diesel]

No need for VGT....

its all in what you use the truck for

 

[windrunner408]

Again as already mentioned, VGT's have vanes that move to provide optimal delivery of the hot gases to the turbine wheel to help the turbo spool up quicker and this is advantageous for heavy towing applications. I am not saying that the same sort of response can't be had with a non-VGT turbo but it does require tuning to get it to be the same and that is the reason for why one would use or stick with a VGT turbo. This is at least what I have heard.

I know I am thinking about just doing a non-VGT even though I have stock injectors to see what will actually happen.

 

[smokedout250]

So Flow that is need from the intakes is made up from the Vgt? Correct? So then a small housing on a turbo would allow you to spool fast and then just waste gate it for pressure wouldnt this setup be as usefull as a Vgt?

I can see in towing the Vgt would have a roll but if your towing once in a great while then what advantage does it have?

Take a truck that's is dd and hardly tows and is never drove in town just open road what is the advantage for this situation?


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[bboteler]

I think it's gonna be a personal preference as to what you run and why, each has "some" benefits. Vgt's do need some maintenance but it's a good excuse to add a batmowheel.

 

[strokin6L]

i have no need for a VGT turbo. Haven't ran one quite a while and my truck runs strong with a non vgt turbo. A bone stock truck can run good with a non vgt if sized right.

 

[wetnsloppy4x]

A big issue with the 6.0 is the heads flow like chit, and the factory intake manifold is very restrictive. Also our style of injection system is pretty outdated. Optimal control of injection timing and good fuel atomization helps spool turbos, something common rail injected engines do better than our HEUI's.

And 7.3s basically spool big turbo's with sheer displacement

Another factor rarely talked about is the stock cam profile in the 6.0. It was designed with a VGT in mind and isn't really optimized for a non-VGT. There was a discussion about this between some of the tuners, either here or on PSN, quite a while back.

Silverback, I'm not trying to be argumentative here at all, but there are much smaller motors out there that spool big non-VGTs just fine. I don't believe displacement plays that big of role when the turbo is sized accordingly.

 

[smokedout250]

Okay so i don't plan to go much bigger than 155 or 175 I know a pmax would be ideal but I'm just thinking of other options I'm not one to really run what every one else is... So what would be a good option for a no Vgt turbo for a mild setup up


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[Bustedknuckles]

I only have .6 more liters and spool a 66/74/.90 marvelously on stock fueling. Just thought I'd throw that out there.

 

[Pizza pig]

I only have .6 more liters and spool a 66/74/.90 marvelously on stock fueling. Just thought I'd throw that out there.

must be nice :swordfight:

cam grind also plays a role, the 6.0 was built around a vgt.

the cumins and duramax didnt change much internally like that when they jumped ship to vgt's, d maxes also have a reverse flow head design....

int:

if the sizing is right the 6.0 has no issues spooling a non vgt turbo.

 

[strokin6L]

even tho i have 190/75 injectors....i've ran my 64/71/70 non vgt with stock tuning with zero issues and it spools and runs very well under stock programming.