Reply
 
Thread Tools Display Modes
 
Old 12-11-2016, 09:44 PM   #1
Bus Crazy
 
milkmania's Avatar
 
Join Date: May 2015
Location: Oklahoma aka "God's blind spot"
Posts: 2,360
Year: 1989
Coachwork: 1853FC International/Navistar
Chassis: 35' Retired Air Force Ambulance
Engine: DT466, MT643
Rated Cap: 6 souls and a driver
Lead walls included.... $10k

Mobile Medical Clinic (Bus)
__________________
I once complained I had no shoes....
Until I met a man with no feet
milkmania is offline   Reply With Quote
Old 12-11-2016, 09:52 PM   #2
Bus Nut
 
mikeypj's Avatar
 
Join Date: Oct 2016
Location: Iowa
Posts: 444
Year: 1989
Chassis: International
Engine: 9.L
Rated Cap: 64
How much do they weigh..



*"The Road goes ever on and on
Down from the door where it began.
Now far ahead the Road has gone,
And I must follow, if I can. *
mikeypj is offline   Reply With Quote
Old 12-20-2016, 02:54 PM   #3
Bus Geek
 
Brewerbob's Avatar
 
Join Date: Oct 2016
Location: Essex, MD
Posts: 3,591
Year: 1999
Coachwork: Blue Bird
Chassis: Blue Bird TC RE 3904, Flat Nose, 40', 277" wh base
Engine: 8.3L Cummins ISC 260hp, MT643, 4.44 rear
Rated Cap: 84 pax or 1 RV; 33,000lbs
What's the scrap price for lead these days?
Brewerbob is offline   Reply With Quote
Old 12-20-2016, 04:20 PM   #4
Almost There
 
Join Date: Aug 2014
Location: Oklahoma
Posts: 85
Year: 1984
Coachwork: Ward/Amtram
Chassis: International 36ft
Engine: DT466 w/ Allison MT643
Holy crap that's in my neck of the woods...

No mention of mileage...

24kva genny?!

What kind of fuel economy would you think it gets with that engine?!

I just read those get about 5mpg, and have no turbo so are fairly gutless for such a large bus... yikes. My skoolie gets over 8mpg, and I feel like it could do better with overdrive... Maybe I should stick to a skoolie for my next build :P
dalez is offline   Reply With Quote
Old 12-20-2016, 05:53 PM   #5
Bus Crazy
 
milkmania's Avatar
 
Join Date: May 2015
Location: Oklahoma aka "God's blind spot"
Posts: 2,360
Year: 1989
Coachwork: 1853FC International/Navistar
Chassis: 35' Retired Air Force Ambulance
Engine: DT466, MT643
Rated Cap: 6 souls and a driver
Quote:
Originally Posted by dalez View Post
Holy crap that's in my neck of the woods...

No mention of mileage...

24kva genny?!

What kind of fuel economy would you think it gets with that engine?!

I just read those get about 5mpg, and have no turbo so are fairly gutless for such a large bus... yikes. My skoolie gets over 8mpg, and I feel like it could do better with overdrive... Maybe I should stick to a skoolie for my next build :P
If you became a proctologist with that bus.....

You wouldn't need turbo, they'd come to you!
__________________
I once complained I had no shoes....
Until I met a man with no feet
milkmania is offline   Reply With Quote
Old 12-20-2016, 06:33 PM   #6
Bus Crazy
 
Join Date: May 2016
Location: Georgia
Posts: 1,583
Year: 2001
Coachwork: Blue Bird
Chassis: IH
Engine: T444E
Rated Cap: 14
Quote:
Originally Posted by dalez View Post
Holy crap that's in my neck of the woods...

No mention of mileage...

24kva genny?!

What kind of fuel economy would you think it gets with that engine?!

I just read those get about 5mpg, and have no turbo so are fairly gutless for such a large bus... yikes. My skoolie gets over 8mpg, and I feel like it could do better with overdrive... Maybe I should stick to a skoolie for my next build :P
I don't know about 'em being gutless ... they're supercharged engines and believe me, they'll cruise comfortably at 80+ Not sure about fuel economy, but I've read some of those coaches will achieve 7-8 MPG or better with that engine. Now in a big truck, sure, you'll get around 5 MPG, moving a lot more weight and wind resistance.
Brad_SwiftFur is offline   Reply With Quote
Old 12-21-2016, 08:38 AM   #7
Almost There
 
Join Date: Aug 2014
Location: Oklahoma
Posts: 85
Year: 1984
Coachwork: Ward/Amtram
Chassis: International 36ft
Engine: DT466 w/ Allison MT643
They're not exactly "supercharged", in that they dont build any positive pressure. That's a two stroke diesel, it needs an air blower just to breathe, but one with just the 'supercharger' is considered an NA because there's no boost pressure. If it can go 80+, it's because of displacement. And I'd expect a 4 stroke in that chassis to do 25% better on economy or more just due to the engine geometry, so what'd the 4 stroke MCI's get?
dalez is offline   Reply With Quote
Old 12-21-2016, 10:43 AM   #8
Bus Geek
 
Join Date: May 2016
Location: Eastern WA
Posts: 4,997
Year: 2002
Coachwork: Bluebird
Chassis: All American RE (A3RE)
Engine: Cummins ISC (8.3)
Rated Cap: 72
Quote:
Originally Posted by dalez View Post
They're not exactly "supercharged", in that they dont build any positive pressure. That's a two stroke diesel, it needs an air blower just to breathe, but one with just the 'supercharger' is considered an NA because there's no boost pressure. If it can go 80+, it's because of displacement. And I'd expect a 4 stroke in that chassis to do 25% better on economy or more just due to the engine geometry, so what'd the 4 stroke MCI's get?
I ran many miles in an Eagle 10 with an 8v71NA and Allison 740. I managed a very consistent 7.25mpg. I ran into a gent who had swapped a Cummins M11 and Allison into a near identical rig and we compared notes. He was getting 9.25-9.5mpg.

That would appear to back up your 25% number.

But..... You can never replace the wail of a 568 cu.in. two stroke at 2300rpm.... I think Delo 100 gets in your blood..
PNW_Steve is offline   Reply With Quote
Old 12-21-2016, 11:08 AM   #9
Bus Nut
 
Join Date: Jun 2016
Location: Orange County, CA
Posts: 849
Year: 1990
Coachwork: integral
Chassis: Crown Supercoach II (rear engine)
Engine: Detroit 6V92TAC, DDEC 2, Jake brake, Allison HT740
Rated Cap: 37,400 lbs GVWR
Every 2-stroke Detroit has a Roots-type scavenge blower. It simply won't run without it. It produces a few PSI of air that pressurizes the air boxes that surround each cylinder. A Detroit has no intake valves, so all the air needed for combustion is blown into the cylinders through the ports as the pistons are beginning their upward travel, at the same time as the exhaust vales are still open - this helps scavenge the old exhaust gasses out of the cylinders before the valves close and compression can begin. The ports are slightly angled to produce a swirl to the incoming air.

Some 2-strokes, like mine, also have a turbocharger to provide additional intake boost when driving, but the turbo obviously does not contribute any real air volume or pressure at idle. When the turbo is at full boost, in my bus about 26 PSI, it simply pushes the air through the blower even though the Roots lobes are still turning. Some blowers have a bypass valve to assist this process.

The military used turbo 8V71s, and they can produce up to 400 HP and about 1200 torque. The more usual non-turbo 8V71 was normally about 318 HP in trucks, but Greyhound's were less than 300 HP because of the difficulty of keeping them cool in their buses in hot weather.

Yes, you're right about the unforgettable sound of a Detroit at full welly - it's addictive to hear it! I love the sound of my engine. I think all 2-stroke diesels are just so interesting, and after all those years in my youth listening to Deltic locomotives on Britain's East Coast Main Line I've finally got my own 2-stroke. (Imagine a loco that has two engines, six cranksafts (two of which rotate the opposite direction than the others), 36 cyliders and 72 pistons, and not a single valve. That sound still makes my skin tingle when I hear recordings of them. Incredible!)

John
Iceni John is offline   Reply With Quote
Old 12-21-2016, 03:51 PM   #10
Bus Nut
 
Rameses's Avatar
 
Join Date: Sep 2016
Location: Chapel Hill, NC
Posts: 855
Year: 2002
Coachwork: Blue Bird
Chassis: All American
Engine: Cummins 8.3/Allison MD3060
Rated Cap: 84
Anybody want this one?

I should have the heads for it around here someplace.

Rameses is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


» Featured Campgrounds

Reviews provided by

Powered by vBadvanced CMPS v3.2.3

All times are GMT -5. The time now is 05:53 AM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2019, vBulletin Solutions, Inc.