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Old 04-26-2010, 11:57 AM   #1 (permalink)
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7.0 EFI vs 7.3 non turbo

Im hoping to get some some opinions. My plan is to pick up a retired Uhaul in the very near future and convert it into a Toter. The plan is to camperize the whole thing except for a 5' garage in the back that will be seperate from the living quarters. It will be built with all the rv hookups so campground camping is possible and the zuk will be towed on a car trailer when needed. Our original idea was a motorhome (which is where I got used to the idea of a big block) but I think the uhaul will be a better platform and I can build it exactly how I like and I think alot cheaper then what people are asking for decent motorhomes. I think either the gas or diesel truck will cost about $3000 for the truck
Anyways after searching Uhauls site it is becoming clear that the gas trucks are way more plentiful then the diesels and are up to 6 years newer so I am thinking it might be a possibility (in Washington there are 5 diesel trucks with 150miles and atleast 30 gas to choose from)

Uhaul claims 7-10 mpg for the 429 and 6-10 for the 7.3. Anyone have any idea if that is accurate? Most of my trips will be within a hundred miles but will probably do one trip a year to KOH and back which is 2000 miles +. The diesel has the spicer 5 speed w/ 4.33s and the gas has a 4 speed auto with 4.33s (ALLISON AT545)

One part of me keeps saying that diesel is the way to go and the other side thinks how bad could the gasser really be towing only itself and my zuk
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Old 04-26-2010, 12:03 PM   #2 (permalink)
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I've got a buddy that owns a moving company with 8-10 trucks. He HATES the deezel trucks for maintainence and swears he'll only be buying gassers. He buys from fleets as they get retired, so about where you'll be buying.

They don't pull a lot of hills as most of their work is in the Salt Lake valley, but I think he's got a bit of a point there. I don't know that the deezels really pull the hills around here much better (in the med. duty platforms) than the gassers and with the maint. argument above, I think I'd lean to the gasser.

I'm quite intrigued with the concept of taking one of these med. trucks and building a motorhome. The catch is that the truck needs to please the wife aesthetically so let's see what you've got and then I'll start building.
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Old 04-26-2010, 12:17 PM   #3 (permalink)
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They arent that bad looking for what they are. This is one just across the border from me.

http://www.uhaul.com/trucksales/truc...ocation=883061

My wife seemed more concerned about sleeping in a old motorhome then anything. Atleast with this it will be new lol

I am having a hard time find thing hp numbers for the 7.0
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Old 04-26-2010, 12:23 PM   #4 (permalink)
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Quote:
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They arent that bad looking for what they are. This is one just across the border from me.

http://www.uhaul.com/trucksales/truc...ocation=883061

My wife seemed more concerned about sleeping in a old motorhome then anything. Atleast with this it will be new lol

I am having a hard time find thing hp numbers for the 7.0

She just wants it to look like it was originally built as a class C. Not something I cobbled together to be a class C. I'm all about function, she's all about form, then function.
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Old 04-26-2010, 12:30 PM   #5 (permalink)
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She just wants it to look like it was originally built as a class C. Not something I cobbled together to be a class C. I'm all about function, she's all about form, then function.
Makes sense. Damn women

I think you would see some funny looks pulling into a campgorund
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Old 04-26-2010, 01:08 PM   #6 (permalink)
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I used to work for Uhual and have tons of miles on both truck....

The big gassers seemed better around town - auto, seemed like more power off the line, etc. BUT the diesels seemed to get better mileage wise and they seemed to have less down time. On the freeway once you are up to cruise speed they both acted very similar.

For long term reliability I'd get the diesel...
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Old 04-26-2010, 01:20 PM   #7 (permalink)
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The 7.3 is probably going to be a hair better on fuel, maintenance costs are about the same, an IDI is a very cheap engine parts wise for a diesel.
Power may be a bit better with the 429, but the last one I drove was hooked to an allison, and it was a dog. And, you can always put a turbo on the IDI, which will bring up both the power and mpg.
Kind of 6 of one half dozen of the other, but the diesel as long as it was properly maintained is going to be the longer lived engine.
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Old 04-26-2010, 01:44 PM   #8 (permalink)
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Thanks guys. I used to own a 6.9 non turbo that I added the ATS kit too which was a good reliable motor. Not fast at all but made it through the hills to Moab and back no problem. From searching on oilburners.net it looks like getting a turbo on one of these will be a full custom job. I am also worried about how quick the pyro will peak. On my 6.9 it had a lot more power up the hills then I could use since it got high egts fast. That was with the big downpipe and straight 4" all the way back.

I have the uhauls records coming today from 5 trucks (both gas and diesel) that I am going to look over but really how accurate will they really be
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Old 04-26-2010, 02:04 PM   #9 (permalink)
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There are also a lot of C-6000's with a TBI 6.0 chev
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Old 04-26-2010, 05:54 PM   #10 (permalink)
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I drive an F700 with the 7.0 for the lumber yard i work for. Im not sure what it gets for mileage, id guess around 8mpg or so (depending on the load). Anyways, the 7.0 hauls very well. Its plated for 26k and ive hauled a few thousand over gvwr a few times, and it will pull hills and maintain speed fairly well. Id even go as far as saying it will haul a full truck load better than our International with the DT444E (same as the 7.3 PSD).

For example both trucks with 2 full bunks of OSB on a long hill, you will be hitting the flashers at 25mph in the International long before you will in the Ford. The Ford also has over 200k on it, all of which was at the lumber yard.

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Old 04-26-2010, 06:06 PM   #11 (permalink)
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Thanks for the post Back Woods. I know it just over the net but its nice to hear other peoples experiences. I just found out one of the trucks has 30k miles on a reman and another has 40k motor 50k tranny. I figure even with my conversion it should be a fairly light load for what the truck is designed for diesel or not
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Old 04-27-2010, 12:29 AM   #12 (permalink)
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Thanks guys. I used to own a 6.9 non turbo that I added the ATS kit too which was a good reliable motor. Not fast at all but made it through the hills to Moab and back no problem. From searching on oilburners.net it looks like getting a turbo on one of these will be a full custom job. I am also worried about how quick the pyro will peak. On my 6.9 it had a lot more power up the hills then I could use since it got high egts fast. That was with the big downpipe and straight 4" all the way back.

I have the uhauls records coming today from 5 trucks (both gas and diesel) that I am going to look over but really how accurate will they really be
Not from what I heard, http://www.gohypermax.com/ProductDis...6-923cb9edcee1
these guys have a kit for the international trucks, I am thining of getting it for my 4600 I just bought from Uhaul, My sales guy told me the bottom price is 2000 for the trucks when i bought mine ......Build thread coming soon.....
Mine looks like this one.
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Old 04-27-2010, 08:34 AM   #13 (permalink)
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I found a old thread where that kit was talked about but it was unsure if it will work or not because of the size of the tranny or something. Buy it so we can find out

Good to know about the $2000, looking forward to seeing your build
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Old 04-27-2010, 01:02 PM   #14 (permalink)
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I have the uhauls records coming today from 5 trucks (both gas and diesel) that I am going to look over but really how accurate will they really be
They should be pretty accurate -- the mobile service guys don't get paid unless they complete the paperwork - And the regional repair centers were usually pretty good about documenting what was done. Uhaul really hates paying for repairs twice.... And almost everything was on a 15/30/60/90 thousand PM schedule. The repair centers loved the bigger PM's as they were money makers as the list of stuff was pretty long (not actual money as Uhaul owns the repair centers, but accountant money that managers could point at when it came time for bonuses "We did $1.7 million in repair work this quarter, with only 0.5% breakdowns...").
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Old 04-27-2010, 02:22 PM   #15 (permalink)
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They should be pretty accurate -- the mobile service guys don't get paid unless they complete the paperwork - And the regional repair centers were usually pretty good about documenting what was done. Uhaul really hates paying for repairs twice.... And almost everything was on a 15/30/60/90 thousand PM schedule. The repair centers loved the bigger PM's as they were money makers as the list of stuff was pretty long (not actual money as Uhaul owns the repair centers, but accountant money that managers could point at when it came time for bonuses "We did $1.7 million in repair work this quarter, with only 0.5% breakdowns...").
Thanks for the info

I found one gasser that has 30k on the engine and 40k on the transmission that I might check out. Im still really undecided on what route I want to go.
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Old 04-27-2010, 02:37 PM   #16 (permalink)
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well, if you see my thread, it'll tell you some.

Mine is getting just shy of 9mpg with my jeep on it.... although i don't have the box on mine.

check that rear end gear ratio if it doesn't go above 55mph. I got the records on mine also, and it never said the put that ratio in the truck.

i've been pretty happy with mine power wise. had to fix a few little things here and there, but nothing major on the engine side of things.

if you do end up going with a uhaul, let me know, i've got some questions to ask them and my free 30 days is long since gone lol.
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Old 04-27-2010, 07:01 PM   #17 (permalink)
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Will do. I have been following your thread. I went and looked at the gasser today and it was decent but nothing special. The box was pretty beat up and patched but then again its a 200k mile uhaul
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Old 04-27-2010, 10:00 PM   #18 (permalink)
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I can't speak from confirmed personal experience, but I've read a lot of people saying that that Allison AT545 kills the power in just about any engine and just turns it into a dog. The advantage is that it is very very plentiful; otherwise, its more of an around town kind of tranny.

Personally, our landscaping company had two Internationals, an 86 and a 90. The 86 had like 140k less miles and an auto tranny (the 545 I believe). The 90 had the 5 spd and over 300k. Both solid trucks with minimal problems, but the 5spd spanked the auto day in and day out. I believe they both had the same motor, but i could be wrong. Even so, they ended up putting a reman motor in the 86 and the thing was still a dog. This is off the start and on the highway, top speed was a solid 5mph difference, I could get 65 with the stick, but never got that with the auto.
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Old 04-28-2010, 05:01 PM   #19 (permalink)
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If memory serves the AT545 is a non-lockup trans. I know it's non O/D. So, I could well see it being known as a power sucker.
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Old 05-09-2010, 07:30 PM   #20 (permalink)
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If memory serves the AT545 is a non-lockup trans. I know it's non O/D. So, I could well see it being known as a power sucker.
correct the at545 has no lockup
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