Injector breakdown
 

Marker - part name
Black - shim
Red - compression spring
Green - compression pin
Blue - intermediate disk
http://hphotos-snc3.fbcdn.net/hs158...._7836093_n.jpg

Marker - part name
Black - feed passage
Red - alignment pins
Green - pin opening/pintle
http://photos-c.ak.fbcdn.net/hphotos..._4129751_n.jpg

Marker - part name
Black - needle guide
Red - pin
Green - pintle tip
http://hphotos-snc3.fbcdn.net/hs158....0_333444_n.jpg
In this picture the needle guide has 3 basic functions; to support the pintle in it's movement, to control the return rate, and also to control the allowed vertical movement of the pintle. If the tolerance is lost between the nozzle and guide, the pintle will stick open, foreign debris is often the cause. Removing material from the upper edge of the needle guide, also known as the stroke-limiting collar, will increase the allowable vertical movement. The pintle tip can also be ground to increase the dead volume in the nozzle tip if in a VCO style, or blind-hole if in a Sac style.

Marker - part name
Black - pintle seat
Red - sac/blind-hole
http://photos-b.ak.fbcdn.net/hphotos..._3845296_n.jpg
This picture shows a closer view of the tip style, this particular nozzle is a Sac style with cylindrical blind-hole.

Weston...
Nice photo's of a injector taken apart.......Andy

There will be notes, when I get some more time...It may get a bit technical.

thats good. nice pics

Keep them coming,you can not get too technical for me.

What injector are you showing torn apart?.

Spare body I had laying around, but somehow I think you are interested in the nozzle, it is from a Cummins 5.9L application, soon to be sporting 8 spray orifices.

im deffinately waiting till u get more indepth here weston. :tu:

This is great to see , thanks for posting :tu:

Thank you weston:rocking:

Awesome pics, thank ya Weston

Thank you. :tu:

Let me know how your 8 holes work out! :U:

We will see.

What advantages will the 8 hole nozzle have over the 5 hole?

From what I have read there is no reason to have more than 5 holes on the 94-98 trucks, was this correct?

some one once told me that the engine is more efficient with more holes cause it dispursed the fuel more, not sure if it is true or not, but a 8 hole shuld flow more fuel

is that one of the ones that are gonna get the multi angle patten?

Possibly, it isn't settled yet.

thanks weston good stuff

Just checked out the injector breakdown pics. Awesome pics man. Made the whole idea of how they work way more clear. :tu:

I don't know how I didn't see this earlier, but this is really great info. Do you have any pics of or can you explain much about the differences between a SAC and VCO style tip. Are there internal differences regarding fuel volume, or is it mostly about structural integrity with more/larger sized orifices.
Thanks,
Sean