I just joined, but it appears the forum will not let me post a new thread, however will let me do a reply. So; hope it doesn't irritate someone to hijack a thread? Related topic anyway.
I'm on land in middle TN, fixing to start growing good food, (exceptionally good food) of the kind talked about at,
http://levels.westonaprice.org/farm-a-ranch/461-nutrient-dense-food-high-brix-farming-gardening.html along with what's being called carbon sequestering, biochar production, in the process we have a bunch of forest land to clean up. (old farm land that grew up in trees) Various portions of usable level and sloping spots on around 130 acres on a mountain side.
In '03 I bought a 1960 D4 7U4.... strait shift, 24V electric start, has the large bulky injector pump like the older pony engine started machines. Worn out in several ways. I rebuilt the tracks, rebuilt engine with sleeves rings and bearings, modified the hydraulics to make it power tilt. But in spite of the engine work it's always been very low on power and takes a lot of starter fluid mist to get it going. But have managed to use it for a few things, couple jobs for hire but otherwise just a little logging and land clearing for myself, although it's just barely usable and to do any pushing it has to run on flywheel power. (engine bogs down with the slightest load, requiring excessive clutch use)
2 years ago I put a turbo from a military multifuel engine on it, running upside down because it was rusty and didn't want to come apart and reverse it's orientation. It gave it a major power boost and I was able to get about 3 hours of real work out of it. And then discovered I'd lost 3 gallons of engine oil through the turbo. Got the turbo right side up so it would quit dumping oil, and no power again. (evidently it was the oil mist making the power)
But I need to use it again for some land clearing so I pulled it back down to the shop recently, (running worse than ever, too weak to drive itself very good) pulled the injectors out, reconnected them to their lines, cranked the engine, and I'm getting weak streams of fuel squirting out, instead of the spray mist that I assume it should be. So there's the problem I suppose, right?
I had previously replaced the non functioning fuel pressure gauge, found fuel pressure weak, put an electric pump in parallel with the mechanical one and brought it up some, (7.5 psi when electric pump is turned on, up to over 10 with engine running) replaced fuel filter, replaced all the injectors, and got one new injector pump piston/cyl unit just to see what that did. (one of those 4 units that are clamped on top the pump) Nothing did much for the power except the turbo when it was dumping engine oil mist through the intake.
So I'm trying to figure out what to do next.
So I guess the best ?'s I can think of is; what is the fuel pressure supposed to be? and does the fuel pump supply the pressure to the injector nozzles or do the little rod pistons in the units on the distribution head do that job?
I have thought of trying to supply the intake with an oil/fuel mist to duplicate what the upside down turbo was doing, but that would not be fixing the problem, just side stepping it.
Any suggestions appreciated.