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  1. Macrobb

    White smoke

    When the IP sticks internally, you get this massive retardation and, yeah, you get white or blue smoke. Basically, the IP is either shot or at least stuck internally. You can: 1. attempt to clean/unstick it using the ATF trick(fill fuel filter with ATF, run for a minute, shut it off and wait...
  2. Macrobb

    7.3 IDIT are suppose to leak

    These high pressure lines have no seal, no rubber at all. It's a flare fitting - clamping it down forces the two taper surfaces together and the softer surface(usually the line) will deform slightly to match any imperfections between them.
  3. Macrobb

    Cheapish 8cyl p pump

    And they sound like a big-block V8 gasser, especially at low RPM under load! Sure, there's some diesel rattle, but I've had a couple of people wonder "Is this a diesel?" PSDs have that distinctive clicking from the injectors.
  4. Macrobb

    Cheapish 8cyl p pump

    What's sad is that despite being obsolete, they still are close in efficiency to modern vehicles if not in power. I'm averaging a respectable 14.5-16 MPG, depending on conditions. That's not out of line with what I keep hearing from people in the real world, when it comes to newer...
  5. Macrobb

    Cheapish 8cyl p pump

    So, first off you need to match your boost to your fuel, and of course, your turbo size to everything. Also, remember - it's not boost that makes power, it's air density. So if you push 80 PSI in at 660F(typical for a turbo with 70% effeciency, you can get something like 0.130 lbs/cu-ft, which...
  6. Macrobb

    Cheapish 8cyl p pump

    Pumps are rated in CCs per 1,000 strokes(or injection events), and I think that may be for the entire 8 cylinder output. So either you are injecting .09 CC per injection event, or .011 CC. (for a 60 CC pump). The actual amount of fuel being injected is quite small; remember, you need a *lot* of...
  7. Macrobb

    Cheapish 8cyl p pump

    I don't like destroying things either, but I will point out that IDIs are in the "nobody wants them" category. They end up at the JY, nobody buys them, and they often end up getting scrapped when nobody buys them. I've ended up saving probably a dozen of them... but there are plenty more out...
  8. Macrobb

    Best oil

    I found that after doing several oil changes myself on an engine at ~3K miles or so, I got the same results - oil turns black only over the first few hundred miles. I just pull the plug, wait till it's only dripping(~10 mins or so) and call it good. I do change it hot half the time(even with the...
  9. Macrobb

    Coolant on intake manifold

    So... I once did modify a set of heads for some plugs. I think they were 1/2" or 5/8"? Anyway, I used an endmill to bore out the oval hole and make it fit the plugs. Then, I installed the plugs with a little RTV, just in case. The plugs worked fine. However... despite trying to be careful, and...
  10. Macrobb

    7.3 IDIT are suppose to leak

    if you take off the upper 4 lines on the IP side(and remove the lines from the truck), you can get access to the bottom 4 to tighten. Then just reinstall the upper 4 lines. At the injector, make sure it's not the return cap leaking instead of the high pressure line.
  11. Macrobb

    IDI Mileage

    It's also a case of 'survivorship bias' - The ones that weren't made quite right, or the castings were very cavitation-prone are now made into Hondas, whereas the ones that are still around are the ones that made it past the early failure stage... and like anything with a "bathtub failure...
  12. Macrobb

    IDI Mileage

    When you line up the marks, you get it "close enough" to run. Then you are supposed to take a timing meter that clamps on the #1 injector line and has a magnetic pickup that goes into a hole next to the crank, and it will give you a timing number in degrees(at a certain RPM, usually 2000). You...
  13. Macrobb

    IDI Mileage

    Black smoke is OK, if it's just a little at WOT - that's too much fuel, so you just get carbon that didn't have oxygen to be burned. If it's a lot of black smoke at WOT, you can always turn the 'max fuel' screw down a bit(one flat of the allen wrench or so) until it goes away. Blue smoke... you...
  14. Macrobb

    IDI Mileage

    It's hard to get numbers unless you happen to have good records - remember the <92 trucks reset every 100K miles, and the 92-94 every 400K miles(399,999->300,000). Also hard to determine if something has been replaced or not, unless you can see an obvious mark(like serial number being way out of...
  15. Macrobb

    Transfer case gasket, is it needed?

    I used 100% silicone tub and tile caulk once(because that was what I had). All the surfaces were clean and I waited 24 hours before adding oil. It worked for at least 3 years, when I pulled it apart to steal parts for another rig. No leaks! The real advantage of the (expensive) Right Stuff is...
  16. Macrobb

    Transfer case gasket, is it needed?

    This stuff: https://www.amazon.com/Permatex-25229-Right-Stuff-Gasket/dp/B001BAH5DI comes in either pressurized cans or a caulk-gun tube(harder to find, more expensive, enough to do a *ton* of gaskets). Autozone has it and Napa, and I think the others do as well. Napa's been the only place I...
  17. Macrobb

    Transfer case gasket, is it needed?

    'the right stuff' is definitely the product to use, because it works so well and has no 'set time' - just install, fill and go.
  18. Macrobb

    Interstate McBee return line kit

    Honestly, if you use my trick of using wheel bearing grease on the O-rings when installing them, you can use the cheapest kits on Ebay with no problems. I've *heard* of an occasional mechanical defect with them(a hole not being cast, or 'flash' on the inside of the cap), but I've bought 5 sets...
  19. Macrobb

    radiator cap

    Fleet charge? It's a standard 'green' coolant with SCAs in it. It should be OK; you do need to check with test strips once in a while, because the SCAs *do* get used up(and there's only a narrow range where they are effective - too little and they don't protect against cavitation, too much and...
  20. Macrobb

    radiator cap

    I think the difference is that a water heater is using plain water, vs running a coolant mixture in your truck. The coolant mixture has anti-cavitation and anti-corrosion additives, which seem to work - I don't see much corrosion happening on engines with good coolant in them.
  21. Macrobb

    Quick turbo question

    Got your own video if it to post? I mean, it sounds cool, but it sure looked to me like he barely gave it any throttle. Find a good high speed road and just floor the sucker! Let her eat! Think something like what I do @ 1:35:
  22. Macrobb

    Radiator spec for 88 Econoline?

    Huh, really? I pulled a couple of radiators from the JY out of IDI vans(not sure what year)... and they were the same narrow/tall radiator that fits (most of) my trucks.
  23. Macrobb

    Is this what I should expect (pulling up grade NA)

    Turbo trucks like more retarded timing, because you have more heat in the cylinder so you get a quicker burn. Run it where it feels best. As far as OD, Banks recommends you tow in OD once you install the turbo - the RPM is too high otherwise, so you don't get any real benefit from the turbo...
  24. Macrobb

    Different voltage regulator question

    Just want to point out - regulators from "smaller" 3G alternators kind of work. It looks like the same shape regulator, and the pins all line up, but between the two brush-screws the smaller/lower-output regulator has the aluminum case go straight across, while the bigger regulators have a...
  25. Macrobb

    Do I need injectors/IP?

    IP timing is very retarded; the cam likes to stick in the retarded position. I tend to get around this by advancing the IP quite a ways - 6 degrees is what it usually takes to get it decent again, which happens to be one IP gear tooth - I'll just pry up the IP gear cover(with everything marked...

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