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  1. P

    Rear diff options

    Randy's Ring and Rinion <http://www.ringpinion.com/>
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    Injector Code Comparison

    Appreciate the "one-stop-shopping" picture on the injectors, BDCarillio. I don't claim to know why the BBs are "better." Reliability is but one criteria but there could be flow rate differences as well as pop pressure. I seem to remember seeing a pop pressure difference between the BB and the...
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    banks sidewinder rebuild?

    Any shop that rebuild turbos can do it. There are several different turbos used on the Banks kits so it depend on which is fitted. My Gen-1 non-wastegated kit used a RotoMaster T04B35, a version of which was also made by Garrett. RotMaster is still in business in Canada and that's where I...
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    Stanadyne Fuel Minder 100 Fuel Filter

    Remember that the original device Ford fitted was ONLY a water separator. The Stanadyne is a filter AND a water separator. 30um nominal as a primary is pretty standard. The secondary is rated differently depending on who manufactured it. The Napa/Wix on mine now is rated at 6 nominal (by...
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    Stanadyne Fuel Minder 100 Fuel Filter

    Some years ago, 2006 to be exact, the OE style water separator on my '86 failed (again) so I went to an alternative, the Stanadyne Fuel Minder 100 (google it). It's a 30 micron primary filter that is also a water separator. The version I got came with a water bowl in the bottom but not all of...
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    Rear diff options

    Yep, you stole the show all right!
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    Rear diff options

    This is true of ANY limited slip. Less so with LSD that have a lot of preload (the amount of clamping forces built into the clutch packs... which is enhanced by gear separation forces in the spider and side gears). Highly preloaded LSD, however, are as bad or worse than a locker in the bad...
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    Rear diff options

    Sorry, been away and couldn't help with this. Every once in a while, you find axles with no stamped BOMs. The tag on the diff cover will identify whether it has an LSD or not but those tags are often left off during service or corrode off. Frankly, if you have a factory LSD, I don't thinks...
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    Seafoam

    There is an old Formula from the Bosch Engineering Handbook about calculating an approximate cranking compression pressure for any given static compression ratio. compression (psi)= (compression ratio - 1) x 1.2 x atmospheric pressure (14.7 psi at sea level) so 21.5-1= 20.5, 20.5 x 1.2 x...
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    Seafoam

    Well, I think that 450-500 psi was in error. I have manuals from '84-94 (6.9-7.3 IDI + 7.3 IDIT) and they all say the same thing as I posted above. The GM 6.2L diesel (also an IDI with a similar Ricardo-type combustion chamber) manuals do list a compression pressure and since they had a...
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    Seafoam

    Well, to start with, both the '86 and '89 Service Manuals I have do not list a minimum pressure. Rather they state the criteria is to first run a compression test by, 1) run engine to normal operating temp, 2) disable injection pump, 3) remove all glow plugs, 4) crank the engine a minimum of...
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    Seafoam

    Here comes Mr. Downer ( : < ) First off, what is "low compression?" Did you do both wet and dry tests? Did you do a CLT (Cylinder Leakdown Test... the tester isn't all that expensive, Northern Tools). Probably a waste of time and money but my saying that has never talked anyone out of...
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    what are you running for exhaust?

    Could you tell us more about using the OBS PSD system. I guess yours in a '92 and mine is an '86 but a 3.5" system is pretty close to optional on my setup and If I could find a used PSD system to install and it fit without major mods, I'd like that.
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    what are you running for exhaust?

    You bring up a good point, Dunk. Exhaust gasses have a volume. The hotter they are, the more volume they have and the larger the pipe needed to not create restriction. That means the front of the system, where the gasses are hottest, is where the bigger pipes need to be. As the exhaust moves...
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    what are you running for exhaust?

    That's a pretty optimal setup for a NA 7.3, Chris. Big single pipes produce better power than duals unless the duals use an X-pipe or crossover to connect the two banks. Bigger isn't better with exhausts. It's a "Three Bears" thing that can all be calculated out. Which I did in a post some years...
  16. P

    Rear diff options

    Yes. If there are "v-notches" in the housing at the ends of the cross, and the ends of the crosses are correspondingly notched then it's a "true" Pwr-Lok. The top pic is a Pwr-Lok. I looked for a pic of the big Trac-Lok, but I couldn't fine one. It's a two piece case that looks a lot like a...
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    Rear diff options

    That's the model number, Dana 70U. Use sandpaper. If you don't find stampings where I mentioned, try the opposite tube or on the front side.
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    How much CO2...?

    Not to put words in Black Dog's post, I think the point to which he is alluding is that even if the seal fails, it's not enough oil to be a problem unless the turbo drain is plugged. The oil drains out of the turbo housing very quickly. Also, there is the pressure differential to consider. If...
  19. P

    How much CO2...?

    It's your truck... BUT: Why is this even necessary or worth the expense and time? How many runaway IDIs have been seen? It's not like we are talking about Jimmy two-strokes here. Back in my Army Sailor days, we had runaway Jimmys on occasion (usually because the rack was set incorrectly). The...
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    Rear diff options

    Many of the so-called "Pwr-Lok" of the mid '80s used in the big Danas was more a burly Trac-Lok with a two piece case similar to the older Pwr-Lok but it didn't have the ramping feature that a "true" Pwr-Lok has, so it's much less effective and will fade away like a Trac-Lok to almost total...
  21. P

    Rear diff options

    Nothing wrong with the D70 and it has more aftermarket LSD and locker applications to choose from than the Sterling. Read the BOM number off the axle tube (right tube when facing the cover, there are usually two set of #s, the ) and I'll tell you whether it originally had an LSD or not. If it's...
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    Rear axle oil?

    Depends on what you will do with the truck. If you tow heavy or a lot, a 75W140 synthetic is optimal. Brand is fairly unimportant if it's a name brand. They are all "good." If it's going to live an relatively easy life, short term heavy towing and no maximum loads long term, then a 75W90 syn...
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    cavitation advice

    Check for obvious things and if nothing is jumps out, change the oil and retest the oil after a couple thousand miles. For all you know, that coolant came from a previous repair and if it had been a long while since a change...??? When you pressure tested, did the system slowly lose pressure...
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    Fuel restoration?

    The DOT and the Tire & Rim Association officially give tires a 6 year lifetime... whether they are in use or not. That doesn't necessarily mean they turn to powder in 6 years, but after that time, they think enough deterioration has occurred to make a tire unsafe. It's basically the truth...
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    Fuel restoration?

    I agree with the shadetree. The main thing that happens to diesel in storage is condensation and/or algae growth. In dry NM, neither of those are likely. My advice is to take a fuel sample and if it looks ok, just run it. Keep adding fresh fuel when it gets to 1/4 tank. The Pri-D is a stabilizer...

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