About the VNT - page 1 - IDI Engine - VWDiesel.net The IDI, TDI, and mTDI source.

• About the VNT by UnderPSI on 12 Jul, 2010 16:05
• Why does everyone orgasm over a VNT?
• #1 by 745 turbogreasel on 12 Jul, 2010 16:19
• Same reason everyone did for disc brakes when they came out.
• #2 by Smokey Eddy on 12 Jul, 2010 16:44
• Quote from: 745 turbogreasel on 12 Jul, 2010 16:19

  Same reason everyone did for disc brakes when they came out.
  

  and TDI
  x2
• #3 by tSoG-84bit on 12 Jul, 2010 16:47
• Quote from: 745 turbogreasel on 12 Jul, 2010 16:19

  Same reason everyone did for disc brakes when they came out.
  

  
  because they're both round? 
• #4 by Toby on 12 Jul, 2010 18:48
• Quote from: UnderPSI on 12 Jul, 2010 16:05

  Why does everyone orgasm over a VNT?
  

  
  Because in theory they should be the best of both worlds. Act like a small turbo at low speed and flow like a big one at high demand. Are they better? Yes, in part because the variable nozzle requires no wastegate so they have less back pressure that a wastegated fixed nozzle turbo. Are the the best thing since sliced bread? Probably not or everybody would be using one. Are they incrementally better? Without a doubt.
• #5 by punkvideo81 on 12 Jul, 2010 19:02
• How hard/realistic/beneficial is it to replace the stock turbo on a 1.6td with a vnt? other mods I have already done to my 1.6td are: ic, giles pump, 2.25" exhaust. been thinking about the vnt
• #6 by theman53 on 12 Jul, 2010 20:12
• MKII requires a custom rear engine mount...all would require a stand alone computer to run them or something like what libbybapa did with his VNT vanagon to control vanes.
• #7 by fatmobile on 12 Jul, 2010 20:37
• Same reason they put it on the TDI.
   It's better.
  It's easy to install on a MK1.
  Exhaust is even easier than the stock setup.
   It hangs down so there's room for a better intake,.. no fancy, high dollar intake needed to improve flow, a cheap gasser intake will do.
  Plenty of power down low, no more waiting for 2000 RPM, and it still slips the clutch in 4th & 5th when pushing over 18psi. That's with a 1.5D, stock 190mm clutch.
• #8 by Rabbit on Roids on 13 Jul, 2010 09:21
• Quote from: fatmobile on 12 Jul, 2010 20:37

  Same reason they put it on the TDI.
   It's better.
  It's easy to install on a MK1.
  Exhaust is even easier than the stock setup.
   It hangs down so there's room for a better intake,.. no fancy, high dollar intake needed to improve flow, a cheap gasser intake will do.
  Plenty of power down low, no more waiting for 2000 RPM, and it still slips the clutch in 4th & 5th when pushing over 18psi. That's with a 1.5D, stock 190mm clutch.
  

  
  
  VNT LOVE!!!
  
  im on my second VNT equipped engine, and i LOVE it. this one is a 1.6 n/a, just boosted. still even has a n/a pump on it. i honestly like the n/a pump better. spools the turbo faster it feels like..
• #9 by UnderPSI on 13 Jul, 2010 14:59
• They are only better if they have the proper control on the vanes.
• #10 by UnderPSI on 13 Jul, 2010 15:39
• Seems practically impossible to use a VNT to it's potential without computer control.
• #11 by rabbitman on 13 Jul, 2010 15:57
• Quote from: UnderPSI on 13 Jul, 2010 15:39

  Seems practically impossible to use a VNT to it's potential without computer control.
  

  
  This has been gone over lots of other times.........use the search.
• #12 by UnderPSI on 13 Jul, 2010 16:18
• Wasn't a question, was stating the obvious.
• #13 by Vincent Waldon on 13 Jul, 2010 16:29
• Quote from: UnderPSI on 13 Jul, 2010 16:18

  Wasn't a question, was stating the obvious.
  

  
  Ah, but if you search you'll find numerous threads describing mechanical control systems that do a very very fine job of VNT control, with no electronics required.   
• #14 by UnderPSI on 13 Jul, 2010 17:40
• I have seen them, seems that to take full advantage of what a VNT can do, electronics would be needed.