Was lucky last night . . .

[dazedandconfused]

I gotcha It just takes some time to see member characters develop within the limitations of black and white text and a few assorted smileys. By all means "do what you do best".

We are all pretty sarcastic around here. Taco is, well a little special and likes the big gals. read tgrew Tacos build thread one day when your bored and you will figure us out.

Whats the plan now David? You going to pull them all and inspect? Think maybe timing or crazy cylinder pressure caused it?

[oldestof11]

I wonder if these were core injectors and the metal just fatigued?

[BC847]

I wonder if these were core injectors and the metal just fatigued?

Quite possibly.

@ Earthdad: That's some good reading. Its first conclusion supports the claim that EDM machining followed by extrude-honing results in a better product.

1) Spray hole walls in injector spray tips produced by EDM are rough on a micro-scale, and
provide numerous possible sites for crack nucleation. Fine-scale details of the hole walls,
revealed by scanning and transmission electron microscopy confirm this. However, there
is no field evidence from used injectors to suggest that fatigue cracks do nucleate at hole
walls under pulsed pressure loading. Yet, when emerging systems are run at ultra-high
injection pressures, the smoothing of EDM hole walls could decrease the chance for
cracks to nucleate there. This is a subject for further study as future field experience with
ultra-high pressure injectors builds.

At the end of the day, I'm concerned about the other nozzles perhaps being in similar shape and as a result, will fail in short order.

So . . ..

While I've no concerns with those from Scheid, diesel injector technology has advanced since these were built. That being said, Where/who to get flow-matched nozzles if not fully assembled injectors with the pop-pressure set to within 5bar of each other?

Oh, Please don't suggest 7-hole units. I may just ban your ass.

[Tacoclaw]

Oh, Please don't suggest 7-hole units. I may just ban your ass.

But just think of the increased bottom end.

[earthdad]

Does that mean that heavily used nozzles, if structurally sound, would be less prone to fatigue do to the smoothing after time? Would a sac type put less mechanical stress on nozzle due to the fact the orifice is isolated from the seat and flow is more equally distributed across holes?
Maybe you could get some lab grade honed injector nozzles from them, and be part of the research team. They did state the need for more "field evidence".

[Tacoclaw]

Just send them a couple of BC's writeups and they may consider it.

[oldestof11]

Personally, Buddha, DDP, Scheid are the top. I might be going with contagious diesel as i have met the owner a few times and he seems knowledgeable.

[AHineman]

I pulled my Buddha Power injectors to check them when my old pump crapped itself.

All within 2 BAR of each other.

[soggy]

I went with SDX 5x18's and they are doing well. However I don't really think SDX is an option for many people any more, I happened to get mine right before the bad things happened.'

edit. I should say that I went with the 5x18's after my scheid 6x16's did the same thing your's did.

[RCCUMMINS89]

If I were you..... Find some genuine bosch nozzles that have been edm'd to your likeness. Then send them to Idaho Diesel Technology and have him flow hone/ balance / match them and set them to your needs for pop pressure. He charges $150.

He did mine..... I have $150 into stock i/c injectors, and they move some fuel.

[BC847]

I've been communicating with Joe @ Scheid and they're building 6 nozzles for me. Still working out the details.

. . . . My truck runs funny.

Had to back-off the timing a quarter of an inch . . or so . . . to help shut up the one stock injector that's rattling. That in turn has the EGTs and black smoke out the exhaust go up . . .big-time!

[RCCUMMINS89]

LOL, ya I noticed when I run a stocker timing (1/4" or so) holy smokes my truck will lay black jets...just trying to move.

[RCCUMMINS89]

What did your old injectors flow? What are your new ones gonna flow?

[BC847]

The original and its replacement set are Schied EDM 6x0.016, 145*

The folks at Schied can have them flow-honed if I insist.

I am interested in assuring they are flow-matched. That apparently introduces flow-honing after the initial EMDing. That and any subsequent machine work with the nozzles is all over the map as far as who agrees with what's a good/working step. Geez, even obtaining actual flow characteristics of a given nozzle can apparently be fraught with inaccurate information.

As best as I can figure, given the sometimes almost cryptic answers to a seemingly simple question, the correctly done EDMed nozzle will perform better in terms of better throttle response. This isn't to suggest they make more power. Just perhaps a little "Crisper" down-low.

I've read Weston say, and I'll comfortably agree without being in the business myself, A perfectly good set of EDM nozzles can be hacked with subsequent AFM. It's apparently all about who does it, and how.

It's clear-cut as hell.

[RCCUMMINS89]

Of course........

When I ask the question of what they flow, lpm wise, I ask what a stock nozzle flows and what the new nozzle flows. This way I can know what it is flowing over stock, according to their readings. Because, yes they all have different ways of flowing.



I also consider the injector builders to be very similar to an injection pump shop. Yes, there are rights and wrongs.... There are better and worse ways of tuning. But every one thinks that anybody that doesn't do it exactly like them are a worthless, retarded, doo doo head that doesn't deserve to breathe.