Where where these prices when I was looking for a bus. That is a TA in there right?
Link: 1968 Mci Bus Motor Home (http://www.ebay.com/itm/281548931373?forcerRptr=true&item=281548931373&viewitem=&sspagename=ADME:SS:SS:US:3160)
"1968 MCI Bus with 6V92 Allison auto conversion. Shore power and solar power. Shore power ac and swamp cooler for traveling. Approximately 25000 miles on motor and trans. Air ride with air leveling system. Full bath with sunken whirlpool tub. Bus was used to pull 26 ft. enclosed race car trailer. See pics for details and Email with questions and provide phone number for response."
BIN $25k
Bought my one owner, barn kept, Converted 1991 Prevost with 52,000 miles on it for $57,000 a few years back. Have put more in it for updates and repairs and you don't buy these puppies for investments. A lot of folks think or act like they do. Bottomless fun pit!
I never knew there was a two-axle MC-8.
That is a 5A with R&M caps
how can you tell, the pictures are tiny! Oops, missed the ebay link. Looks nice, who said it was an MC-8?
Brian
The interior on that bus looks a lot like one that a friend of mine bought a couple of years ago. He had a small Airstream trailer and told a few friends he was looking for a bigger camper. Somebody told him to talk to a lady nearby. She said that she had a bus - "professionally converted" - that was owned by her late husband; she didn't know much more about it than that, but she thought that it was OK. He looked at it and asked how much she wanted, she said $4500. He said "isn't it worth more than that? It is mechanically good, it looks good outside and in, and all seems fine". She said "I have cancer and I found the car I want to drive to chemo treatments; it's $4500, so that's what I want for the bus". He offered to have it valued but she said no, she was $4500 firm and wouldn't budge from that. He had it checked over and agreed and gave her the $4500 and she signed over the title. He promised to help drive her to chemo but she said that she was OK but may take him up on it when she got sicker. He called her a few times and asked if he could help her with anything but she always thanked him and said that she was doing fine. Then about 8 months after he bought the bus, she passed away.
She couldn't tell him anything about the bus or how to operate the systems ("my husband knew all about that - it was his bus"). There's a plaque near the windshield listing the converter as being done in 1994 (I forget the name, but the inside was done in a very tidy manner and it's still in excellent shape; there's nothing particularly flashy or special about the interior but it does strike you as being nicely done). The first time he drove it, the power steering pump split and left him on the side of the road so it was a tow home, but since then, it has performed flawlessly.
Sorry, I don't know where the MC-8 came from.
Is there a difference between a 6v92, 6v92t, and a 6v92ta? Did they make a none turbo? How do you tell a T from a TA? I am not well versed on MCI buses or v92's, but I am guessing someone dropped some coin on that one to put a 6v92 and an auto in there. I wonder how they manage the extra heat that it produces with that setup?
I think that the vast majority of 6V-92's put into a bus type configuration were TA's. I've heard of natural 8V-92's, but I've never heard of a natural 6V-92. I think the reason for that is probably overlap power-wise with the 8V-71 that the 6V-92TA was the upgrade for - a natural 6V-92 would have about the same HP or a little less than a natural 8V-71 set up for N-65's. If you look at the picture of the engine there is the coolant cross-over tube between the thermostat housings, and just below that on the right hand housing is the coolant tube for the aftercooler, curling up over the cam pulley. On that particular engine The engine was not in an MCI configuration, the front motor mount has been fabricated from tubing, so I am going to guess that bus originally had an 8V-71, not a 6V-71. Not sure any MC-5A ever came with a 6V-71/auto anyway. The cooling has been completely changed from stock, the floor of the radiator chamber has been moved to make room for the turbo, there is no fan belt to drive the squirrel cage fans, so without pictures it's impossible to tell what they did. What you can assume is that if it was pulling a 28 foot race car trailer the cooling system works...
Be fun, with the recent threads, to see how it's trailer hitch is set up.
Brian
Lot of those guys installing the 6v92TA in a MCI 5 just fashion the the fan set up like the MCI 7 combo with one side mounted radiator there are several of those around
So if one did not have an aftercooler would it be just a 6v92t?
Yes,the old green blocks some were just T's,with the sliver blocks all are TA's
So my father's bus has a 6v92. The turbo sits directly on top of the blower and I do not see anything that I would call an aftercooler (an air to air radiator and associated plumbing). I am quite sure it is a silver block, so it is in a 6v92t configuration right?
You can't see the aftercooler, it is inside the engine block underneath the blower. It gets the air after the turbo and the blower have both had it, hence it is an "after" cooler. The only part you can see is the small coolant tube that goes into the right hand thermostat housing. The aftercooler is air to liquid. The air is blown down into it by the blower, and it takes coolant from the waterjacket of the block at the bottom of the airbox and sends it up and out to the thermostat housing.
Brian
Thanks Brian, I had no idea that was the setup. The large trucks I see at work have massive air-to-air radiators to aftercool the intake air, and I had a Volvo 850t that used air also. That incoming air must be very hot if they are willing to use 190 degree coolant to cool it.
New engines still have a option of a after cooler they are not married to the charge air coolers, where you are confused the CAC is a inter cooler meaning the air is cooled before the turbo and with a after cooler the air is cooled after the turbo
Virtually all new Diesels have air to air aftercoolers. They are positioned to be the first cool air before the radiator. I have air to air intercooling (between the turbo and blower) on my 8V-71. My set up was the first Don Fairchild installed on a bus. He liked it so much, he's done several other buses that way. When pulling a long hill, it keeps the intake much cooler then the rather small coolant aftercooler on Detroit TA engines. Good Luck,, TomC
Quote from: Barn Owl on January 03, 2015, 06:08:59 AM
Thanks Brian, I had no idea that was the setup. The large trucks I see at work have massive air-to-air radiators to aftercool the intake air, and I had a Volvo 850t that used air also. That incoming air must be very hot if they are willing to use 190 degree coolant to cool it.
The temperature of the charge air is quite directly related to the amount of boost. If you are running 30 psi above ambient maximum boost the intake charge air will be around 350 degrees F, from memory. I think the aftercooler can pull that down to around 220 degrees, again from memory (and I have no idea where I am remembering those numbers from). So quite a useful drop in temperature.
Brian
I talked to the owner of that bus about 10 years ago and they were asking around $ 64,000 at that time. It was in Jasper, Indiana
Steve 5B......