VNT turbos
Moderator: Mike Everman
-
Thedon
- Posts: 20
- Joined: Mon Jul 31, 2006 6:22 pm
- Antipspambot question: 0
- Location: haines city, fl
VNT turbos
Has anyone here ever thought of using a VNT turbo for a GT? The thought ran across me while reading up on them. A guy on my mercedes forum has one in his 300D and it works like a small turbo and a larger one at the same time. Would the vanes help with spool up time in a GT and throttle control? or something like that. Im learning here so help please 8)
-
Johansson
- Posts: 1161
- Joined: Sun Nov 21, 2004 9:42 pm
- Antipspambot question: 0
- Location: Northern Sweden
Your location says Fi, are you perhaps talking about mersuforum.net? If so, I must say that I am truly impressed with the work done by some members there. Getting those amounts of power from old diesel engines is awsome...
Anyway, since the standard "turbocharger" turbine is not exactly flight-worthy spoolup times and throttle response is not a problem so I would use a cheap turbo from a truck and put the VTN in a bike instead! :wink:
//Anders
Anyway, since the standard "turbocharger" turbine is not exactly flight-worthy spoolup times and throttle response is not a problem so I would use a cheap turbo from a truck and put the VTN in a bike instead! :wink:
//Anders
-
Thedon
- Posts: 20
- Joined: Mon Jul 31, 2006 6:22 pm
- Antipspambot question: 0
- Location: haines city, fl
nope the super turbo guys are at an american site dedicated.. only ones this side of the pond. www.schumanautomotive.com/forums (shameless plug)
I was just cureous if a VNT would be any better. Maybe I'll be the first to give it a try.
I was just cureous if a VNT would be any better. Maybe I'll be the first to give it a try.
-
racketmotorman
- Posts: 503
- Joined: Sat Jul 23, 2005 11:11 pm
- Antipspambot question: 0
- Location: Australia
Hi Thedon
GTs and turbos, even VNT turbos , work differently and at different pressures , comp out vs turb in .
On a GT, the comp out and turb in pressures are roughly the same , but on a VNT turbo the vanes are generally "closed" during spoolup with inlet pressures much higher that compressor output pressures , often twice as high . Trying this (closing the vanes) on a GT during spoolup would send the comp into surge .
The value of VNT for a GT would be in initial tuning of the engines turbine stage , once the optimum full throttle VNT position was found , the mechanism should be locked in that position , unless you want to spend an enormous amount of time making automated controls for its movements at off load conditions
Cheers
John
GTs and turbos, even VNT turbos , work differently and at different pressures , comp out vs turb in .
On a GT, the comp out and turb in pressures are roughly the same , but on a VNT turbo the vanes are generally "closed" during spoolup with inlet pressures much higher that compressor output pressures , often twice as high . Trying this (closing the vanes) on a GT during spoolup would send the comp into surge .
The value of VNT for a GT would be in initial tuning of the engines turbine stage , once the optimum full throttle VNT position was found , the mechanism should be locked in that position , unless you want to spend an enormous amount of time making automated controls for its movements at off load conditions
Cheers
John