Vince, you prolly all ready have this info. but i will post this for everyone else! these #'s came from a authentic VWoA factory repair manual the #'s are N/A's for example but will work for other 1.6 injectors!
specified value = 120 to 130 bar (1740 to 1885 psi. )
thicker shim increases pressure
a change in of 0.05mm (0.0019in.)changes pressure approx. 5bar (72psi.)
shims are available from 1 to 1.95mm (0.039-0.070in.) in steps of 0.05mm (0.0019in)
so with the help of these #'s you should be able to determin what size shim you need by doing a little math after the rebuild!
thanks Duane
Awesome, Vincent.
Would you mind posting where you got your nozzles on your website, so all the info is there? The part numbers were a great touch, btw. It's nice seeing all that stuff clearly, concisely, and well documented in one location. Now, I need to rebuild my 1.6na injectors.
Might I suggest a copy to the FAQ/Tech section when you are all done? Very good post, well done. Looking forward to reading chapter two on the 1.9's.
Jim
Well, I've been a bad boy... :oops:
I managed to get the nozzles replaced in my 1.9 this weekend, but was in a hurry, so I wasn't able to take pictures...
They are very similar to the 1.6's, save that the injector housing is longer, and as mentioned there are two concentric springs instead of just one. My spacer and shims showed some discolouration, but none of the grooving on Vince's, so I cleaned everything up and put my new nozzles in without lapping.
Unfortunately, I don't have access to a pop tester at the moment, so I'll have to make due without balancing them for now.
Interesting, I assume that someone has replaced the nozzles at some point in the past, as my understanding is that the stock nozzles are ".278's". That is what smog supplied to me, and what I installed, but .308's are what came out. Right now with the new .278's, it idles Higher (1000 now vs 850 before) and seems a bit more powerful, but that might just be the placebo effect.
My real test will be to see the fuel consumption on the next few tankfuls...
if your idle went up, your fuel consumption should theoretically decrease if you can keep your foot out of it.
i'd like more info on those two stage injectors
would they work on a 1.6? is it worth it? seems like it could give a more gentle idle, and a more powerful top end?
Would the higher idle be because of a better spray pattern?