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Old March 15th, 2010, 08:20 PM   #41
don4life
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how hard is it to convert (assuming original gas set up) over to diesel????
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Old March 15th, 2010, 08:33 PM   #42
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how hard is it to convert (assuming original gas set up) over to diesel????
Unfortunately that's an impossible question to answer. In my case, I'm not using any factory parts, and there is no readily available swap kit (Avalanche Engineering makes a universal crossmember for Cummins swaps, but I don't think it would work well in a 88-98 chevy due to tight clearances). So, since I'm not done with this yet, I guess you'll have to subscribe to this thread and see how much blood and sweat I lose over this thing!

There is a thought process in the Scuba diving world called DIR, which means "do it right". That is the kind of thinking I'm trying to apply with this build. Every part that is going in this truck is being refurbished and rebuilt, and I'm not rushing myself or giving myself a deadline.

Now, if I was to use all factory parts, leave the IFS in, and go with a factory 6.5 Diesel and auto trans, I could probably be driving this thing already, but where would the fun be in that?
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Old March 15th, 2010, 08:42 PM   #43
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im was just curious about supplying with fuel. is i pretty straight forward like a pressure line and return?
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Old March 15th, 2010, 09:01 PM   #44
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im was just curious about supplying with fuel. is i pretty straight forward like a pressure line and return?
In the case of the cummins, there is a lift/fuel pump mounted on the side of the block like an old carburated gas motor. Then there is a return line. I'll probably reuse the EFI lines, reflare/cut/adapt them to fit, and remove the fuel pump from the tank and extend the line on the sending unit. I'll definitely post pics when I do this. It should be really simple (famous last words......)
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Old April 8th, 2010, 07:08 PM   #45
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I'd taken a few weeks off this project because I had some stuff to clear up at work, and I was out of town for a bit, but I'm now back on it.

Today I started stripping out the core support. I've decided to pull and install the engine this way, so I have the front fenders and hood for clearance measurements. I LOVE working on southern vehicles. This texas truck made it super easy to unbolt everything. No rust, no broken bolts. BTW, the date on the pics is not correct, I took these with a borrowed camera because mine is in for repair.



The wahoos that owned this truck prior to me started pulling the engine by hand with no cherry picker. This is how they left it for me, with the oil pan unbolted from the block!

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Old April 8th, 2010, 07:15 PM   #46
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why 3:50 gears? are you going to run a smaller tire?
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Old April 8th, 2010, 09:05 PM   #47
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why 3:50 gears? are you going to run a smaller tire?
35-37 inch tires.

Cummins diesels run at very low RPM's. They like the 1,600-2,100 RPM range.

With the NV4500 .75 overdrive at 1800 RPM I'll be travelling at 71 MPH with 37 inch tires.

Most Cummins trucks come from the factory with either 3.07 or 3.50 gears.

I can always gear deeper if needed, but I'm going more for MPG than for pulling power, and think this combo will work well. I've talked extensively with both Avalanche Engineering and the owner of Fordcummins.com. Both think 3.50 gears will be perfect.
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Old April 8th, 2010, 09:09 PM   #48
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Here is an interesting swap in case you have not seen it yet. Not too close to yours but some good info.

1969 Ford Cummins Crew Cab Conversion... - TheDieselGarage.com
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Old April 8th, 2010, 09:15 PM   #49
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Sick man can't wait to see it finished
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Old April 8th, 2010, 09:21 PM   #50
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Here is an interesting swap in case you have not seen it yet. Not too close to yours but some good info.

1969 Ford Cummins Crew Cab Conversion... - TheDieselGarage.com
That's a cool build. He's basically building what I originally was going to. The parts that are going into this Suburban were originally picked up for my old 77 Ford F-250 Crew, but I decided to sell that truck when I realized I would need more interior room.
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Old April 8th, 2010, 10:00 PM   #51
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That's a cool build. He's basically building what I originally was going to. The parts that are going into this Suburban were originally picked up for my old 77 Ford F-250 Crew, but I decided to sell that truck when I realized I would need more interior room.
A cool swap indeed. I have thought about doing one but I am lazy and cheap so I will buy a diesel when the time comes and just take care of the maintenance myself.
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Old April 9th, 2010, 10:16 AM   #52
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A cool swap indeed. I have thought about doing one but I am lazy and cheap so I will buy a diesel when the time comes and just take care of the maintenance myself.
lol I felt the same way.... I just waited a while to find one that needed repair that was cheap enough.

X2 on cool build. I can't wait to see the finished product.
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Old April 29th, 2010, 10:23 PM   #53
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updates?
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Old April 30th, 2010, 06:45 AM   #54
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updates?
Sorry, not much to report on. Basically all the drivetrain is stripped from it now, and it is ready for me to start mocking up the front axle and motor mounts.

However, I took a new job a few weeks ago in which I am out of state during the week, so the little bit of time I have at home is spent with the family. The job is probably temporary, or seasonal at most, so I'll definately have more time this fall and winter to work on it. I'm trying to still do a bit here and there on it, and will post any progress when I can.

One neat perk of the job is that I finally got the fire lit under my ass to get my motorhome operational. I did, and am now living in it Mon-Fri in Ohio. It is a 1948 GM PD3751 retired 35 foot Greyhound bus converted into an RV.



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Old April 30th, 2010, 06:58 AM   #55
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Great build and neat motorhome. Looks like you're having fun with both. How's the old bus run BTW? (not to get off topic)
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Old April 30th, 2010, 07:14 AM   #56
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Great build and neat motorhome. Looks like you're having fun with both. How's the old bus run BTW? (not to get off topic)
Thanks. The bus runs great. When I got it, it had all kinds of of little mechanical problems, and I've fixed 90% of those. It runs/drives probably much like it did in 1948, and is a real pleasure to drive. It has a inline 6-71 Detroit Diesel in the back.

The next step with the bus is cosmetic restoration/redo. I don't have a TV in it, so when I am off work in the evening, I've been working on it. The plan is to ditch all the stuff on the roof, fill in the holes, and repaint it similar to the original greyhound colors on the outside. I also need to fix/replace most of the windows. I'm planning on eventually gutting most of the interior and re-working the floor plan to suit my tastes, as well as updating most everything. Maybe I'll start a build thread for this thing
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Old April 30th, 2010, 05:06 PM   #57
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you should definately start a build thread for the bus, that thing is awesome.
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Old April 30th, 2010, 07:29 PM   #58
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the build and the bus are both sweet.
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Old May 1st, 2010, 09:25 AM   #59
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you should definately start a build thread for the bus, that thing is awesome.
x2, I bet that thing is awsome with that old detroit screamer in the back.
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Old July 5th, 2010, 10:07 PM   #60
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any news on the burb?
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