read the tech folder... more Q than A.
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Logistics Pro
Joined: Oct 2008
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From: Avilla, IN
read the tech folder... more Q than A.
I've just finished reading all the VGT info in the tech folder.
There is alot of good info in there, but I have many more questions.
It seems that the only downfall of the VGT is sticking vanes. Apparently this is amplified by the EGR system. Are there any other fall backs of a VGT over a non-VGT in your opinion?
I am trying to decide if I should put a VGT on my OBS 7.3L PSD. I know that controlling it will be the main difficulty. Since I would have to go with an entirely different computer system, like maybe this: http://delphi.com/shared/pdf/ppd/pwrtrn/dcm_lddcs.pdf
I wouldn't neccessarily need the same type of accuation that the 6.0 VGT uses. If need be I could use this: http://delphi.com/shared/pdf/ppd/pwr..._smtremote.pdf
So here's a summary of what I have questions about:
1) How reliable are VGTs w/o emmissions prevention like EGR systems?
2) How well do larger VGTs actually spool at low rpm?
3) What kind of Backpressure : Boost numbers do VGTs that spool quickly at low rpms have at high rpms?
4) Who makes good VGT turbos that do not neccessarily have the same type of accuation that the 6.0 uses?
I know that's alot of questions, thanks in advance.
There is alot of good info in there, but I have many more questions.
It seems that the only downfall of the VGT is sticking vanes. Apparently this is amplified by the EGR system. Are there any other fall backs of a VGT over a non-VGT in your opinion?
I am trying to decide if I should put a VGT on my OBS 7.3L PSD. I know that controlling it will be the main difficulty. Since I would have to go with an entirely different computer system, like maybe this: http://delphi.com/shared/pdf/ppd/pwrtrn/dcm_lddcs.pdf
I wouldn't neccessarily need the same type of accuation that the 6.0 VGT uses. If need be I could use this: http://delphi.com/shared/pdf/ppd/pwr..._smtremote.pdf
So here's a summary of what I have questions about:
1) How reliable are VGTs w/o emmissions prevention like EGR systems?
2) How well do larger VGTs actually spool at low rpm?
3) What kind of Backpressure : Boost numbers do VGTs that spool quickly at low rpms have at high rpms?
4) Who makes good VGT turbos that do not neccessarily have the same type of accuation that the 6.0 uses?
I know that's alot of questions, thanks in advance.
Elder User
Joined: Aug 2010
Posts: 662
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From: KCMO
I would not recommend putting a VGT on a non-natively VGT motor.
Just tuning it will be a nightmare, and if you get the tuning wrong then you could very easily toss a rod with insane backpressure.
Put a properly sized "normal" turbo on it and go from there.
Sorry I didnt directly answer any of your questions, but I wanted to throw it out there.
Just tuning it will be a nightmare, and if you get the tuning wrong then you could very easily toss a rod with insane backpressure.
Put a properly sized "normal" turbo on it and go from there.
Sorry I didnt directly answer any of your questions, but I wanted to throw it out there.
Thread Starter
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Logistics Pro
Joined: Oct 2008
Posts: 4,818
Likes: 1
From: Avilla, IN
Not to be a jerk, but I think I can handle the tuning part of it. Besides with the stock turbo I have now once you hit 35 psi boost ur at almost 70 psi backpressure. Even my old 7.3 has a backpressure sensor on it.
I've spent all my free time the last three days reading the tech folder info and researching elsewhere online. A VGT is better than a non-VGT. The only reason they have a bad reputation here is because the EGR crap causing them to stick. Tractors run VGTs with plenty of reliabilty. I guess I'm on my own for this project.
Peace.
I've spent all my free time the last three days reading the tech folder info and researching elsewhere online. A VGT is better than a non-VGT. The only reason they have a bad reputation here is because the EGR crap causing them to stick. Tractors run VGTs with plenty of reliabilty. I guess I'm on my own for this project.
Peace.
