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Author Topic: mercedes injectors vs GTD injector nozels?  (Read 2755 times)

July 23, 2007, 10:48:15 pm

jaw174

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mercedes injectors vs GTD injector nozels?
« on: July 23, 2007, 10:48:15 pm »
mercedes injectors vs GTD injector nozels?

which is betteR?
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Reply #1July 23, 2007, 10:57:58 pm

subsonic

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mercedes injectors vs GTD injector nozels?
« Reply #1 on: July 23, 2007, 10:57:58 pm »
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2009 Jetta TDI Loyal edition, 6-spd. 16V 2.0CR


1985 VW Golf 5-spd, 4-door, 1.6NA  Bought from orig. owner in Savannah with 42,000 miles.
"Making the jump NA to TD" slow but sure.

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Reply #2July 23, 2007, 11:29:24 pm

Vincent Waldon

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mercedes injectors vs GTD injector nozels?
« Reply #2 on: July 23, 2007, 11:29:24 pm »
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
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Vince

Edmonton, Alberta, Canada
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Reply #3July 24, 2007, 12:04:27 am

Black Smokin' Diesel

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mercedes injectors vs GTD injector nozels?
« Reply #3 on: July 24, 2007, 12:04:27 am »
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.
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91 Passat syncro 1.8T swapped.
Reply #4July 24, 2007, 01:26:00 am

Jetman

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mercedes injectors vs GTD injector nozels?
« Reply #4 on: July 24, 2007, 01:26:00 am »
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.
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Reply #5July 24, 2007, 02:03:20 am

Black Smokin' Diesel

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mercedes injectors vs GTD injector nozels?
« Reply #5 on: July 24, 2007, 02:03:20 am »
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.
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91 Passat syncro 1.8T swapped.
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