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For the "6.9L Navistar," what is the usual spray

Sent to Ford Experts May 14 4:00 a.m.

For the "6.9L Navistar," what is the usual spray pattern for the injectors? And, what is their "pop-off" pressure and normal delivery gph at say 2200rpm, as a function of power? Thanks!!

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Ford 6.9 Liter IDI

Already Tried:
Physics experiment in drop size analysis... what is the mean droplet size for a chirp ON/OF spray cycle?

Customer (name blocked for privacy)

Status: Closed Value: $15

Info Request
May 15 11:35 p.m. (1 day and 19 hours later)

At this time none of us know the answer to your question. We do not supply answers unless we are very confident in an answer for the repair. Sorry but this concern is to difficult for us or none of us are familar with this concern. We normally can answer every question but sometimes there are questions that stump us. I personally do not know the answer. I am sending this info to you as an info request though I am not requesting you tell me more info. I can relist your question for another go around if you choose so. If you choose to reply please say Thanks for trying or please relist.

Chris (aka- Moose) -- FORD certified Technician -- 100% Positive Feedback on 5465 Ford Accepts
Ford Employed Certified Tech. Transmission, Transfer Case, Driveline, Suspension, Engine, Electrical

Reply
Sent May 27 8:26 p.m. (11 days and 20 hours later)

Thanks Chris,
Sorry for delay, sifting thru 100+ emails on DIY-EFI forum, took a long time!! The answer came from yet another source, a Diesel Fuel Inj. Service place that revamps Inj. pumps.... spray is a small cone that hits the curved surface of the "pre-cup" that allows a swirling burning mixture to expand into the cylinder as the piston completes its power stroke. The injector "chirps" as usual, during the injection pulse... unknown drop size distribution although the "pop-off" pressure is usually set up from 1950psi to 2150 psi for finer atomization and easier starting, as well as lower emissions.
Thanks for your effort Moose.
remguy7@aol.com

Customer (name blocked for privacy)

Info Request
May 27 11:49 p.m. (3 hours and 22 minutes later)

Glad you found the answer

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Chris (aka- Moose) -- FORD certified Technician -- 100% Positive Feedback on 5465 Ford Accepts
Ford Employed Certified Tech. Transmission, Transfer Case, Driveline, Suspension, Engine, Electrical

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