Franken motor!

[935racer]

Just got 30 new injector heat shields, should be on the dyno in 2-3 hours. Will we break 200? :twisted:

[935racer]

Epic fail.

Lost 12 whp

I dyno'd 195whp for my base line run today, new injectors maxed me out at 183whp. :evil:

 :roll:

[subsonic]

WTF!   :?   How can stock nozzles put out more than these?  Any idea's ?

[Giles@PerformanceDiesel]

Hey what nozzles did you install in the other injectors?

send me a PM if you want

Giles

[jimfoo]

Is the spray pattern different on the Merc nozzles? Maybe they don't promote the same swirl in a VW. Or the timing changed as a result of them?

[935racer]

Video:

http://millerperformancecars.com/car-videos/passenger-performance-jetta.html

Click and save as.

The ones I just put on that made less power were 1.9 injectors with mercedes 300d nozzles, the ones that made 195 (smoothed graph) were stock 1.6td.
The 1.9 injectors do seem to give more fuel, I took it for a drive and my revs were hanging, but but it doesn't pull as hard as the 1.6 nozzles.

What are we going to do to get more fuel Giles? I need way more fuel from 5500 and up.

[jtanguay]

love the video!!! sounds like a jet engine when that thing gets going  

sucks for the drop in whp though

i seem to recall reading about the merc nozzles being designed for a different type of pre-chamber, maybe that has something to do with it? fine for the low end, but lacking on the top end?

[subsonic]

Hey what nozzles did you install in the other injectors?

send me a PM if you want

Giles

DNO SD261   0 434 250 128

These were installed in AAZ 1.9 dual spring injector bodies.  Pop preasure was set at 155bar.  The first time they have been run since being rebuilt was when Dave installed them for the dyno run.  Nozzles were brand new. Injectors rebuilt by reputable injection shop.

The dual springs were designed to quite the engine down a little right?  I think they let a little fuel through right before the main injection. I don't know if this has anything to do with it.

I think the AAZ injectors were also set at a different pop preasure than the 1.6TD injectors.  Again, not sure if this has any effect on the results.

Would timing need to be changed to compensate for the different injection rate of the dual springs?

I guess if none of the above could be considered factors, you could try swapping the nozzles into the single spring 1.6 bodies.  Process of elimination.

[1slowvw]

After watching that vid I am left speechless, the sound is amazing.
I am also curious now as to what effect the merc nozzles would have in the 1.6 body.
Either way you guys should be very pumped(no pun intended), your a real inspiration to us diesel guys who are just at the bottom of the learning curve.

1SlowVW

[DVST8R]

After watching that vid I am left speechless, the sound is amazing.
I am also curious now as to what effect the merc nozzles would have in the 1.6 body.
Either way you guys should be very pumped(no pun intended), your a real inspiration to us diesel guys who are just at the bottom of the learning curve.

1SlowVW

I had the same wondering, the 1.6 nozzles in the 1.9 bodies, and the merc's in the 1.6 bodies. Just for more knowledge.

[rallydiesel]

That video is great.

[subsonic]

What do you think Giles, about the difference in the injector bodies?

[carrizog60]

please try the merc nozzles on 1.6 bodies as i have done the same and am concerned that they didnt give any gains because my turbo cant give more than 1.6 bar...


did you acheived the same pressure?

[Benjamin]

I had the same wondering, the 1.6 nozzles in the 1.9 bodies, and the merc's in the 1.6 bodies. Just for more knowledge.

I was thinking exactly the same  

Greetz, Benjamin

[subsonic]

I just got off the phone with Giles.  He also suggested swapping the nozzles into the 1.6 bodies for a run.  
As a additional note, he thought there might be the possibility that the 1.9 dual spring injectors have the potential, if performance tuned correctly, to deliver more power.

Jim