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The RedBurb

Every Part Is Replaceable
It's possible for your oil pressure to actually be dropping off, but you would be hearing the babbitts clattering. I'm pretty sure you would have included that in your original post if that were the case. A short anywhere in the circuit could send it to zero, the sending unit is just the most likely failure point.

The engine is definitely not acting any differently, so I agree there is a short somewhere.
 
Have a question for you all, have done some research but most information I’m finding is old and not sure if it’s credbile anymore, but what, if any, kind of diesel fuel additive are you using? Doesn’t get warm enough here in Florida to be concerned about fuel gelling, but I want to take good care of my engine and want to make sure it’s getting adequate lubrications. So just use the OTC Stanadyne or Amsoil stuff or something else?

Thanks in advance.

Andy
 
I ran two-stroke oil in my 7.3 IDI which helped quiet it down some. TCW3 spec is what I’d heard people say to use so I did. I usually put a quart in each tank (about 20 gallons). That mixture ratio was just a number I came in with nothing special
 
Have a question for you all, have done some research but most information I’m finding is old and not sure if it’s credbile anymore, but what, if any, kind of diesel fuel additive are you using? Doesn’t get warm enough here in Florida to be concerned about fuel gelling, but I want to take good care of my engine and want to make sure it’s getting adequate lubrications. So just use the OTC Stanadyne or Amsoil stuff or something else?

Thanks in advance.

Andy

My strategy is just to replace the injection pump with every other oil change. Works every time.





:haha:
 
Have a question for you all, have done some research but most information I’m finding is old and not sure if it’s credbile anymore, but what, if any, kind of diesel fuel additive are you using? Doesn’t get warm enough here in Florida to be concerned about fuel gelling, but I want to take good care of my engine and want to make sure it’s getting adequate lubrications. So just use the OTC Stanadyne or Amsoil stuff or something else?

Thanks in advance.

Andy

If you look for "diesel lubricity study," you should find a report from a reasonably scientific study, published a decade ago over on thedieselplace.com. They blind tested several additives and ranked the outcomes. They did say, at that time, 2-cycle oil was the cheapest way to get a passing lubrication measurement. More was required, but it was cheaper than dedicated diesel additives and outperformed several of them.

I found an archived copy here, but there used to be a thread collecting other similar test data.

http://www.jatonkam35s.com/DeuceTechnicalManuals/Diesel_fuel_additive_test.pdf
 
My strategy is just to replace the injection pump with every other oil change. Works every time.

That’s too rich for my blood. Lol.

If you look for "diesel lubricity study," you should find a report from a reasonably scientific study, published a decade ago over on thedieselplace.com. They blind tested several additives and ranked the outcomes. They did say, at that time, 2-cycle oil was the cheapest way to get a passing lubrication measurement. More was required, but it was cheaper than dedicated diesel additives and outperformed several of them.

I found an archived copy here, but there used to be a thread collecting other similar test data.

http://www.jatonkam35s.com/DeuceTechnicalManuals/Diesel_fuel_additive_test.pdf

Thanks for that. Extremely helpful. I’m thinking, per that study, the Opti-lube XPD May be the best option.
 
Stanadyne is a good one my brother-in-law ran it every tank in the Cummins I have now for ten years. A lot of them are the same or real similar. I used to run some actual Ford Powerstoke additive I got from work and it smelled exactly the same as the Power Service Diesel stuff. Anything will help add lubricity back to the fuel. I've ran atf, clean used hyd oil, clean used transformer oil, new engine oil. There's some stuff called "Drew's Brew" I read about once. It's 8 oz of Marvel Mystery Oil and 16 oz of Power Service mixed together and added to each tank of fuel. I had good results with it but you have to be religious about running it every single tank otherwise you get bad results for fuel economy.
 
Opti-lube XPD delivered and added to the recently filled tank. Will see how it does. Have been getting 14-15 mpg. Interested to see what difference this makes.
 
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Continuing work on the battery box. Got to cut one more hole on the front face for another outlet, install studs/drill corresponding holes/get wing nuts for securing the box, and then Herculine ...

The on/off switch is a remote switch for the power inverter, the socket next to it provides 2 outlets and 2 USB ports for camping/RV-type utility, and the outlet that will go on the front face will be an easy-access outlet for power tools.

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Andy
 
Got to thinking about it, and wasn’t sure why I was planning on herculining the underside of the box when it was never going to be seen or really even need it, so last night it got some spray paint. About to herculine the top side here in a few.

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Catching up, and enjoying the work you’re doing.
I was gonna mention when I was towing with my 6.2 220 is about as hot as it got. I ran it there for about 20 miles foot to the floor going 25 mph.

Serpentine belt swap with the newer 6.5 water pump and the fan should help. That's the plan for my Jimmy but I'd imagine you already knew that
220 was my top end, too, before the updated radiator. The 130gpm pump, dual thermostats, a big fan, and the dual pass keeps everything steady at 210 while running 2700 in 3rd and cresting the pass at 55mph. These engines make a lot of heat, and it took a race car radiator to keep it cool.
That’ll be in the works at some point in the future. Right now I’ll swap in my 195 tstat and see what it does. But those upgrades will definitely be coming.
You’ll enjoy the process and the payoff.
The engine is fine at 2200RPM. You can cruise well at 1800RPM with that engine, and I run mine slower than that. So 2200 in O/D is overdoing it a little bit for road use.
I agree. The noise break over is significant from 1800 to 2200, as is the mpg hit.
He’s got 4.88s with the 40s and has commented on how much happier the engine is with the 40s vs the 38s.

Calculator says I would be at 2040 with 4.56 and 1834 with 4.10 which is what I have now, when I move to 37s. Calc gives my 33s and 4.10s 2,015 rpm so almost seems like if I stay with 4.10s and go to 37s, I will have the same net effect as David’s 38s to 40s with 4.88s.

If I remember correctly, the engine seemed pretty happy with my worn out military 37s. I remember being relatively impressed with the truck's ability to move down the road on the trip home after purchase.

So perhaps the best thing to do is stick with the 4.10s. I guess I was thinking since I have to regear the 60 anyways, now might be the best time to gear to 4.56 or 4.88. But I suppose it makes more sense to build for what I actually do, instead of what I might do. I guess if I ever do find that I need a lower gear ratio, they aren’t that expensive so it won’t hurt to do it again.
If I ran my 37s with a big stinking turbo and intercooler, I’d run 4.56s at the max. With enough air, the engine will build torque nicely as boost catches up on a grade in the 1800-2100 range, and you have room to downshift and use 3rd at 2500-2800.
Thank you, not quite as slick as @AgDieseler ’s box, but it should suit my purposes just fine. Someday I plan on building a steel rendition once I get my welding skills up.
Everything has a rev level, and this box you’ve made seems to work very well.

David
 

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