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Discussion in 'Shiny Things' started by Joz, Apr 27, 2011.
I love these kind of projects!
Another wrenching in your driveway thread - welcome.
Not all of us can have a fancy ol' big city garage to work in!
With nearly double the fuel mileage out of the Cummins it would be worth it vs buying a new camper or just simply not using it anymore and letting it sit. The ability to run the Cummins on bio diesel also makes it worth it to me.
forget the hydro boost, use a vacuum pump to power the brakes since the ac controls are probably also vacuum powered, you will need a tank for additional safety
True, but I can get a new 12VDC vacuum pump for $50 to run all the HVAC stuff & cruise control. With a vehicle this size I'd rather have a more positive brake feel than the vacuum booster. It does okay, but sure seems like the right time to make it right.
Awesome project Joz!
I don't know how the cummins diesel compares, but the International in my van is loud, but it's not that loud.
Looks like a cool build. You may want to check out this forum for parts, advice, etc.:
They concentrate on the Cummins 4BT engine (the 4-cylinder version of your 6) but there's info on swapping just about any diesel you can think of into any vehicle you can think of. There are lots of build threads which probably include info you'd find useful.
Thanks! 4btswaps.com has been massively helpful already. Yes, there is a tremendous amount of information in there.
When it comes time to wrap it up, Dyna-Mat or Road-Kill the inside of the firewall and everything else you can get to. Should help the noise issue!
If you need a hook-up, I'll sell it to you at my cost.
I was very close to pulling the trigger on a conversion exactly like this for my 76 motorhome built on a dodge chassis. Plenty of room, and almost a direct bolt up conversion I was told.
What stopped me was the cost vs. miles used per year. And the biggie was the generator being a gas unit. We use our generator a LOT while traveling to run our roof AC unit. By having multiple fuels it would make fuel stops a pain in the rear as the generator runs all day. The only way I would do it is if I could buy a diesel generator relatively inexpensively.
Yup, I was thinking the same thing, although as I recall he was converting his generator to propane. I find that we use our propane stove more and more and, of course, crank up the propane for heat in the winter. So basically that's a 2-fuel solution (diesel and propane) rather than 3 fuels (gasoline, diesel and propane) which would be a PITA to manage.
We only use propane for the fridge, heat, and occasional cooking, so our 25 gallon tank lasts me 2-3 years of normal use.
I really wanted to do the diesel conversion, like, really badly. But I just could not see having to come up with another tank, mounting it, then when getting fuel (a hassle in a big motorhome anyway), having to move between pumps and filling multiple tanks with diesel and gas.
So I think I am just going to do the EFI conversion and call it good. Rebuilt the 440 last year and it has quite a few power upgrades. Weighing in at 14k lbs, and pulling our 4500 lbs SUV, it cruises at 65 and will pull the blues on I-84 at about 40. I need to just quit complaining and drive it.
Of course, if the OP's conversion goes smooth and gets fantastic power and economy, I may rethink things.
I forgot about the propane side for the 'fridge. Gotta keep that beer cold!
If you plan on needing the gen set to run the AC unit on the rig then stay with the gas fed version. It will use a lot more fuel on propane. Figure about a gallon an hour for a 3.6 Kw gen set on propane. If you do not plan on running the AC unit on the generator get yourself a small Honda 2000 generator. That is all we use on our full time RV and it runs everything we need except the AC unit on 9/10 a gallon for about 8 to 10 hours of use. If it is hot enough to need air conditioning we go to full hookups.
When stationed in Albuquerque, NM in 1990, we purchased a 28' Shasta with a 6.2 diesel motor. The noise wasn't that bad and we had a blast with it. I did have to have the left head worked on due to a water leak, but the company I got it from put new gaskets on both sides and that did the trick. I did have to get the trans replaced after a trip back to Illinois one Christmas to, but that was like $400 for the new one with a new shift module that let it rev more between shift points.
Fun times and like I said, the noise wasn't bad for one of the early Chevy 6.2 diesel motors and a lot of that was right between the driver and passenger seats.
There's a vacuum pump on the front of the Cummins which seemed to work pretty well in my '93.