AAZ Injector upgrade ? - IDI Engine - VWDiesel.net The IDI, TDI, and mTDI source.

• AAZ Injector upgrade ? by stewardc on 11 Jul, 2008 11:19
• Is there a true legitimate injector upgrade for an AAZ? I have a Giles pump and now want to upgrade the injectors, if anything better is available.
• #1 by gigaz2 on 11 Jul, 2008 13:59
• european "GTD" injectors, from the RA/SB engine code
  
  but ask Giles, he can hook you up
• #2 by stewardc on 11 Jul, 2008 14:30
• The GTD nozzles don't seem to work any better in a good AAZ.
• #3 by gigaz2 on 11 Jul, 2008 14:52
• what "gtd" nozzles?  what was the partnumber of the nozzles you tested?
  
  in Europe the "gtd" was a trim level, the engine could be the 70hp JR or the 80hp RA/SB, around this forum somebody started to call the later "gtd nozzles".
  
  there are sellers that sell JR nozzles as GTD, and they are correct, as the GTD could have both.
• #4 by stewardc on 12 Jul, 2008 03:57
• I haven't tried them myself, it just seems that all the posts I've read state that the 2-stage AAZ injector is about the same as the single-stage GTD injector. Maybe I'm wrong....that's why I posted this.
• #5 by commuter boy on 12 Jul, 2008 12:10
• I'll be swapping my GTD nozzles from Smog that were in in my 1.6 style single stage "umwelt" injectors into a set of 1.9 dual stage injector bodies for my AAZ passat in the next few weeks.  I'll post if there's any significant difference.
• #6 by stewardc on 12 Jul, 2008 12:35
• Quote from: "commuter boy"

  I'll be swapping my GTD nozzles from Smog that were in in my 1.6 style single stage "umwelt" injectors into a set of 1.9 dual stage injector bodies for my AAZ passat in the next few weeks.  I'll post if there's any significant difference.

  
  
  That sounds great. keep in touch.
• #7 by mdonau on 12 Jul, 2008 17:03
• hi..
  
  the Nozzle itself is the same for nearly all 1.6L D/TD: DN0SD293 to pop at 130 or 155Bar, it doesn't matter if 54, 70 or 80HP.
  
  DN0SD297, 294 or 308 from AAZ or 1,6TD with 60HP also work great on the others. the engine will start better an run smoother (it's great for SVO)
  
  for more Perfomance get a bigger plunger und some more dynamic timing.
  
  2-stage injectors makes your engine run more silent, but it is no
  performance-upgrade, some had a MPG-drop when driving hard.
  another negative thing: they cant be completely tested and adjusted
   by a normal pop-tester..
  
  i have DN0SD297@175 Bar with a 10mm plunger: in idle i sounds like a DI :roll:
  
  if you want to do something good for your engine: take new nozzles and adjust to 165Bar, like spark-plugs, nozzles get weared.