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Engine Specific Info and Questions => IDI Engine => Topic started by: jaw174 on July 23, 2007, 07:48:15 pm

Title: mercedes injectors vs GTD injector nozels?
Post by: jaw174 on July 23, 2007, 07:48:15 pm

mercedes injectors vs GTD injector nozels?

which is betteR?

Title: mercedes injectors vs GTD injector nozels?
Post by: subsonic on July 23, 2007, 07:57:58 pm

BAM!  Pour a drink and start reading.

http://vwdiesel.net/phpBB/viewtopic.php?t=6947&highlight=mercedes+injectors

Title: mercedes injectors vs GTD injector nozels?
Post by: Vincent Waldon on July 23, 2007, 08:29:24 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

Title: mercedes injectors vs GTD injector nozels?
Post by: Black Smokin' Diesel on July 23, 2007, 09:04:27 pm

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.

Title: mercedes injectors vs GTD injector nozels?
Post by: Jetman on July 23, 2007, 10:26:00 pm

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.

Title: mercedes injectors vs GTD injector nozels?
Post by: Black Smokin' Diesel on July 23, 2007, 11:03:20 pm

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.