mercedes injectors vs GTD injector nozels? - IDI Engine - VWDiesel.net The IDI, TDI, and mTDI source.

• mercedes injectors vs GTD injector nozels? by jaw174 on 23 Jul, 2007 22:48
• mercedes injectors vs GTD injector nozels?
  
  which is betteR?
• #1 by subsonic on 23 Jul, 2007 22:57
• BAM!  Pour a drink and start reading.
  
  http://vwdiesel.net/phpBB/viewtopic.php?t=6947&highlight=mercedes+injectors
• #2 by Vincent Waldon on 23 Jul, 2007 23:29
• I'm in the process of building a set of both... me and my gTech will take them for a spin and let you know.   Breaking pressure will be set exactly the same, as will pump timing etc.
  
  My money's on the Mercedes nozzles, based on what I've read, but I already bought the GTDs so will test 'em both.
  
  
  Vince
• #3 by Black Smokin' Diesel on 24 Jul, 2007 00:04
• At one time not so long ago I had a set of injectors with GTD nozzles and mercedes injectors. I noticed that the needle was quite bigger on the merc nozzles.
  
  I installed the merc injectors when I replaced the head (along with a 1.9td metal HG). Right now power is a bit under standard TD power only because I cut the fuel a fair bit (I wanted to wait for the required re-torquing of the headbolts after 1000 miles). Now that it's done I'll be upping fuel shortly. I hope to see nice gains from those injectors.
• #4 by Jetman on 24 Jul, 2007 01:26
• Quote

  I wanted to wait for the required re-torquing of the headbolts after 1000 miles

  
  
  aaz metal hg don`t need re-torquing..
  
  Autodata says, stage 1: 40nm stage 2:60nm stage 3: 90deg. stage 4: 90deg.
• #5 by Black Smokin' Diesel on 24 Jul, 2007 02:03
• Quote from: "Jetman"

  Quote

  I wanted to wait for the required re-torquing of the headbolts after 1000 miles

  
  
  aaz metal hg don`t need re-torquing
  
  Autodata says, stage 1: 40nm stage 2:60nm stage 3: 90deg. stage 4: 90deg.

  
  
  I don't think it has anything to do with the HG I used. The bolts are stretch bolts and they stretch a bit at first. When I re-torqued them they were definitely easier to tighten than when I torqued them the first time around before running the engine.
  
  The MK2 bentley has the same initial torquing procedure you described but adds 1/4 turn after first warmup at idle and another 1/4 turn after 1000miles.