I disagree to some extent that an SBU would have to be extremely modified to pull 10K lbs, I think it could be done reasonably well enough with an SBU depending on what you concider an acceptable acceleration rate, and how fast you wanted to be able to run uphill. With my stock geared U1000 with a 150hp turbo engine turned up to 162 hp the PTO Dynomometer (which is probably 180 at the crank) I can pull our pintle hitch trailer with 10K of scrap (plus the trailer at around 3k) in top gear at the 53 mph top speed on relatively flat roads, and can still pull up fairly steep hills at 40-45. If I had higher gearing so that the engine could sit in it's torque curve instead of redline, I believe it would do OK even on the hills. If you started with a 1750 or something, added an intercooler, cranked up the pump and added some bigger injectors, and put on an overdrive, I think you would have a decent trailer puller, but you aren't going to run 70 mph, you will priobably have to settle for something in the low to mid 60's. BD, you are correct that it will take some work to do it, but I don't think you would have to go with a U500 or 2450 to get the job done... but it would be nice to have one of those high hp monsters dragging around a trailer with a hummer in tow. Problem with a U500 is Eric wants a DoKa so he can haul people/dogs, and I would imagine that there will not be any doka's on the market for quite some time.
Cheers,
Ben
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People freak out when I drive into the shop with a perfectly good Mercedes, only to start cutting it up for parts. I just tell them that something has to die inorder to keep all of the other Benz's running.
I know this is off topic a bit, but in trying to figure the FORST package out, I think it might be off of an MB TRAC because the step on the fuel tank skid plate is centered
on the tank, more or less. The steps for the 406's and SBU's are all toward the front of the tank shield ,where the cab is. The MB TRAC is the only one with the cab centered. I doubt many DOKAS are fitted with the package, but never say never.
I should have paid more attention when I originally lifted the Photos from EBAY Germany. The Listing did say UNIMOG, but I think the Trac is more likely.
I should have paid more attention when I originally lifted the Photos from EBAY Germany. The Listing did say UNIMOG, but I think the Trac is more likely.
Ahhh - that answers my next question.
I was going to try and buy that engine/trans skid from you...
...back to the previously scheduled discussion.
__________________ " It looks just like a Telefunken U47 ! "
I guess I should just buy a GMC 4500 or something and pull the Hummer and the Mog at the same time and not worry about trynig to make a wheeler also double as a highway queen? I think this is my best bet.
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Eric Ward ericward@email.com
Western Slope, CO. USA
+1.303.960.6676 Mobile
99 Hummer Open Top - dual lockers, big lift, tons of mods, HID headlamps, more lights facing backwards than most vehicles facing forwards, my baby
I don't own a Mog...yet. I'm in the market.
The Mog would be best used as an extractor for your Hummer. You could just keep the Mog at the trailhead and when you bury the Hummer and break an axle you could come and pull the hummer out. My 406 performs best using a Jeep as a counterwieght, a Hummer would probably work good also. You can really haul down a trail towing a Heep, no worry of spinning out.
The Mog would be best used as an extractor for your Hummer. You could just keep the Mog at the trailhead and when you bury the Hummer and break an axle you could come and pull the hummer out. My 406 performs best using a Jeep as a counterwieght, a Hummer would probably work good also. You can really haul down a trail towing a Heep, no worry of spinning out.
I agree. My 406 is at its best with a nylon strap on the back and a Jeep at the end of the strap.
Last edited by wilson1010 : 08-07-2007 at 05:44 PM.
There is only one SBU in the states I'm aware of that could accomplish this, a 2450 with a cummins 5.9 and twin disc transmission. I think there may be two of these.
I've wondered how hot the rear portal hubs will get when running 70 mph towing a heavy load with 400-500hp? We've discussed plumbing a pump to circulate fluid through the drain and fill holes.
I'll chip in here, as I'm the owner of one of those two 2450s...
One of them has the Cummins engine, which is good for around 450hp if it's tuned.
The other one (mine) has a Mercedes OM366LA, turbo and intercooler, and is rated 240hp stock. Mine has been tuned up a bit from there.
They both have the excellent Twindisc automatic transmission, as you said. I think Mercedes and Twindisc made around 30-40 of these for the German army, but it was too expensive to be successful, and they didn't do any more after that. The two in the USA are the prototypes, which Twindisc eventually sold off.
Regarding the axles, mine has fairly slow (7.53 total) axles, but since the twindisc has a double-overdrive (0.571 to 1) it can still do about 89mph. However, the axles run very hot, especially the differential. If you flog it up a really steep long grade, you can get to 275 degrees or more. For that reason, I stick to 55mph, and the diff usually will be below 200 degrees after a long run. The U500 has a fan on the driveshaft to help with that, but the 2450 has a torque tube so that wouldn't work. A cooler like you described would be a good idea.
The 2450s can tow just about anything you can hook up to them. I don't know the official rating, but mine came with a 45,000lb pintle from the factory, and the brochure shows one pulling a 600t train.
I definitely recommend these big SBUs to anyone looking for a mog. They are quite modern, but not so modern that you can't work on them. There is at least one other 2450 that is not twin-disc (the "dinohunter" that Jim Ince recently sold) and other similar ones seem to come for sale from time to time.
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