freelander l series uses the same injectors as the sdi iirc

 

nah different, not sure on specific sizes tho

freelander uses the same vp37 as the sdi but it's been set up differently in terms of plunger displacement etc

 

Interesting. I don't have a ZR injector to hand (just left my parents where they are stored!) or i'd check. I'd be interested to know the nozzle diameter on the ZR injector compared to the SDI version.

I've often thought that having a nozzle with 8 holes (as with some of these) but smaller diameter would yield better atomization (retaining good MPG) and also allow for increased fueling (so more power).

 

the more orifices decreases the durability of the nozzle, can't remember if it was 7 or 9 but there were some experiments iirc on tdiclub and they just never worked right

 

I guess structural integrity of the nozzle would decrease yeah, if there are off-the-shelf OE nozzles available in this config though, they must be specced accordingly?

 

I'll have a look when I get home if I get a chance. I think I may have the number somewhere in all my junk.

 

yeah should be allright tbh, probably just a bad design (think they were custom?)

 

I have been looking at the effect of the number of holes on performance and the general rule is:
5 holes for power.
7 holes for clean burn.
I have a pdf of someone study that they did, let me just see if I can find the link....

http://cdn.intechopen.com/pdfs/1134...s/11340/InTech-Effect_of_injector_nozzle_holes_on_diesel_engine_performance.pdf

The study was based on one engine so don't know if it hold true for larger capacity engines? Gets a bit heavy in places but the conclusion is worth a read.

 

looks interesting

 

I have found the nozzle number for the Freelander and added it to the original post.
Going to try and find the dimensions!!

 

well everytime i see data like this the 300tdi's look ever more appealing

 

Because they have a nozzle diameter similar to that of a human fist?!

 

tbh one of the more attractive things is, it's a nice upgrade (I know that from my flow tests) but on the grand scale it's not all that big either. (okay, it's on the big end of the scale, but there's bigger lol)

 

very interesting data there,, think i might sell my 300tdi's and then purchase a set of 200tdi nozzles to try, and see how they run with a standard turbo

 

I have now found the last few bits of data with many thanks going to Bosch Technical for providing the info.
I have put the data in my first post so all the info is in one place!!
The stock injectors are smaller than I was expecting!!

 

Dakta
With your fuel requirements would have thought you would be making something out of a funnel, ball bearing and a spring!!:errx2:

 

hahaha

would you beleive it i intend to run rather lean for me. Gotta be careful with these vnt's. The 300tdi will probably still be on the larger end of the scale but probably be a little kinder than the wingies. With a rough idea of the flow rates over increasing injection pressure I can probably draw up a rough model that can be used to callibrate things so the ecu don't get too misled when they eventually go in.

Be a while before I play with injectors though, got a lot going on just regular sdi's at the minute which actually deliver an allright punch, I'm just wary of the injection period with these - I do have concerns for the high iq's on vp37's it's gunna be too long really bearing in mind we don't really want to touch the timing.

 

Are the ones with 2s for the two stage injectors and the ones with cr for common rail ? If so what's the rest with nothing attached ?


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One of the main points to take away from that document:

Furthermore, jets emerging from smaller
nozzle orifices were shown not to penetrate as far as those emerging from larger orifices.
This decrease in penetration means that the fuel will not be exposed to all of the available air
in the chamber.

Which perfectly corresponds with what 220Dratturbo said. Fewer holes = more (possible) power

 

I assumed that the '2s' meant 2 stage but have no idea what the 'cr' was related to, I was just taking the info straight out of the Seven catalogue.
Common rail does seem like a logical explanation. All the remaining nozzles with no codes I guess are single stage.

 

nozzle design is very complicated.

However a few interesting ones there to consider. That list is very useful indeed.

 

I'm planning on running a lotta fuel in my VP37 so we'll soon see what it can handle or not

 

thats what i like to hear.

 

fear with me and sdi's is seeing smoke increase with fuelling and thinking it's the turbo not flowing enough when it might not be, it'll be hard to tell, hard to measure unless one does experiments. But at what cost?

We'll have to see I suppose.