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07-06-2017, 09:22 AM
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#181
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Bus Geek
Join Date: May 2009
Location: Columbus Ohio
Posts: 18,758
Year: 1991
Coachwork: Carpenter
Chassis: International 3800
Engine: DTA360 / MT643
Rated Cap: 7 Row Handicap
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with a 4.44 rear and 11R22.5's you should be able to go close to 65.. to tach at 2400.. or does the 8.3 not run 2400 RPM?
-Christopher
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07-06-2017, 09:48 AM
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#182
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Bus Geek
Join Date: Oct 2016
Location: Essex, MD
Posts: 3,738
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
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Quote:
Originally Posted by cadillackid
with a 4.44 rear and 11R22.5's you should be able to go close to 65.. to tach at 2400.. or does the 8.3 not run 2400 RPM?
-Christopher
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Same thing I calc'ed. I've seen 2500-2900 rpm listed on various sites.
Looks like 3k might be the max?
https://cumminsengines.com/powerspec...and-parameters
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07-06-2017, 09:51 AM
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#183
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Bus Geek
Join Date: May 2009
Location: Columbus Ohio
Posts: 18,758
Year: 1991
Coachwork: Carpenter
Chassis: International 3800
Engine: DTA360 / MT643
Rated Cap: 7 Row Handicap
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will it run 65 or do you run out of horsepower? or it just doesnt like to climb hills?
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07-06-2017, 10:24 AM
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#184
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Bus Crazy
Join Date: Feb 2015
Location: Cincinnati, Ohio
Posts: 1,001
Year: 2000
Coachwork: Blue Bird
Chassis: International
Engine: TE 444
Rated Cap: 12
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The parking brake will be a problem, 643 came out of an air brake truck, my bus has a drum parking brake. My bus also has a 3.90 rear with the same tires as yours
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07-06-2017, 10:25 AM
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#185
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Bus Geek
Join Date: Oct 2016
Location: Essex, MD
Posts: 3,738
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
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Quote:
Originally Posted by cadillackid
will it run 65 or do you run out of horsepower? or it just doesnt like to climb hills?
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On flat ground I can run 65 within the 2500 rpm. I've hit 70 but that was over 2500 maybe 27ish. Uphill is where it dies.
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07-06-2017, 12:28 PM
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#186
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Bus Geek
Join Date: May 2009
Location: Columbus Ohio
Posts: 18,758
Year: 1991
Coachwork: Carpenter
Chassis: International 3800
Engine: DTA360 / MT643
Rated Cap: 7 Row Handicap
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so you have the right rear gears, just need to have more horsies.. or a 9 speed or such where you would have gears in between the ratios that the 643 gives you..
is a few HP as easy sliding the fuel plate on an 8.3 like a 5.9?
-Christopher
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07-06-2017, 12:32 PM
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#187
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Bus Geek
Join Date: Sep 2014
Location: Eustis FLORIDA
Posts: 23,764
Year: 1999
Coachwork: Thomas
Chassis: Freighliner FS65
Engine: Cat 3126
Rated Cap: 15
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Quote:
Originally Posted by Brewerbob
... hate money.
Fixed.
643 is only a 4 speed. And maybe in a shortie but there isn't a chance in hell Chris is going to run up the east coast hills that are called mountains in 4th. My bus weighs 20,600 without seats and plywood.
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643 is amazing compared to 545. I have both. I don't want to mess with all the electronics and all that. The 643 would give me more power and efficiency, as well as help the 444 run a good bit cooler. My bus already does 75mph so I really don't NEED double overdrive. THe freeway is FAR from me and I never use it. This is a daily driver bus, the shorty. 643, full size tires, and 4.10 rear tires would be great. I already have two of the three, just need to upgrade the transmission sometime in the future.
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07-06-2017, 12:33 PM
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#188
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Bus Geek
Join Date: Sep 2014
Location: Eustis FLORIDA
Posts: 23,764
Year: 1999
Coachwork: Thomas
Chassis: Freighliner FS65
Engine: Cat 3126
Rated Cap: 15
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Quote:
Originally Posted by Kubla
The parking brake will be a problem, 643 came out of an air brake truck, my bus has a drum parking brake. My bus also has a 3.90 rear with the same tires as yours
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I'm lucky- I've got hydro brakes and an air parking brake.
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07-06-2017, 12:38 PM
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#189
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Bus Geek
Join Date: May 2009
Location: Columbus Ohio
Posts: 18,758
Year: 1991
Coachwork: Carpenter
Chassis: International 3800
Engine: DTA360 / MT643
Rated Cap: 7 Row Handicap
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EC - even just running my 1000 in 4th gear (which is basically running like a 643) is amazing compared to the 545... I dont dislike a 545 bit now that ive driven a lockup trans in a school bus i can see why they are much preferred.. even running the byrd in 4th it ran cooler and didnt max the RPMS completely..
I should look for a 1545 (lockup 545) for the DEV bus.
im wondering if they ever built a 444E with a 643 or anything using an SAE2 bell.. thats the big thing is to be able to find the correct spacers for an SAE2 bell.. it may just be as easy as removing a spacer behind the flywheel.. but i didnt take my flextplate off.
-Christopher
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07-06-2017, 12:40 PM
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#190
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Bus Geek
Join Date: May 2009
Location: Columbus Ohio
Posts: 18,758
Year: 1991
Coachwork: Carpenter
Chassis: International 3800
Engine: DTA360 / MT643
Rated Cap: 7 Row Handicap
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Quote:
Originally Posted by EastCoastCB
I'm lucky- I've got hydro brakes and an air parking brake.
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is it an air actuated park brake and there is still a drum on the back of the transmission? or is it a different type parking brake altogether?
-Christopher
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07-06-2017, 12:42 PM
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#191
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Bus Geek
Join Date: Sep 2014
Location: Eustis FLORIDA
Posts: 23,764
Year: 1999
Coachwork: Thomas
Chassis: Freighliner FS65
Engine: Cat 3126
Rated Cap: 15
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Quote:
Originally Posted by cadillackid
is it an air actuated park brake and there is still a drum on the back of the transmission? or is it a different type parking brake altogether?
-Christopher
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huh... IDK I'll have to look.
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07-06-2017, 12:43 PM
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#192
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Bus Geek
Join Date: May 2009
Location: Columbus Ohio
Posts: 18,758
Year: 1991
Coachwork: Carpenter
Chassis: International 3800
Engine: DTA360 / MT643
Rated Cap: 7 Row Handicap
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I looked all over that bus but never payed attention to the park brake
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07-06-2017, 12:45 PM
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#193
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Bus Geek
Join Date: Sep 2014
Location: Eustis FLORIDA
Posts: 23,764
Year: 1999
Coachwork: Thomas
Chassis: Freighliner FS65
Engine: Cat 3126
Rated Cap: 15
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Me either, obviously. I'll check next time I'm at Shaun's place to start it up and move it around a bit.
Got another painter buddy coming out next weekend!
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07-06-2017, 12:54 PM
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#194
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Bus Geek
Join Date: May 2009
Location: Columbus Ohio
Posts: 18,758
Year: 1991
Coachwork: Carpenter
Chassis: International 3800
Engine: DTA360 / MT643
Rated Cap: 7 Row Handicap
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sucks that painters are such flake-outs.. youve already done the hard stuff.../ they just need to help mask it and shoot it, sounds like
-Christopher
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07-06-2017, 01:03 PM
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#195
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Bus Geek
Join Date: Oct 2016
Location: Essex, MD
Posts: 3,738
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
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Quote:
Originally Posted by cadillackid
is a few HP as easy sliding the fuel plate on an 8.3 like a 5.9?
-Christopher
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I saw a post saying to do that while I was looking for the max RPMs. It was from a guy asking the difference between the 210hp and 260hp versions. I already have the 260 version so I don't know if there' more adjustment or more involved. The 880 lbft of torque instead of the 660 would be nice.
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07-06-2017, 01:09 PM
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#196
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Bus Geek
Join Date: Oct 2016
Location: Essex, MD
Posts: 3,738
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
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Quote:
Originally Posted by cadillackid
sucks that painters are such flake-outs.. youve already done the hard stuff.../ they just need to help mask it and shoot it, sounds like
-Christopher
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Or buy a gun and call it done.
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07-06-2017, 01:10 PM
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#197
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Bus Geek
Join Date: Oct 2016
Location: Essex, MD
Posts: 3,738
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
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Quote:
Originally Posted by EastCoastCB
643 is amazing compared to 545. I have both. I don't want to mess with all the electronics and all that. The 643 would give me more power and efficiency, as well as help the 444 run a good bit cooler. My bus already does 75mph so I really don't NEED double overdrive. THe freeway is FAR from me and I never use it. This is a daily driver bus, the shorty. 643, full size tires, and 4.10 rear tires would be great. I already have two of the three, just need to upgrade the transmission sometime in the future.
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Find me a 3060 and send Chris up here and you can have him bring my 643 down to you. We both get new trannies and Chris gets a workout. Sounds like a win-win-win to me
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07-06-2017, 01:28 PM
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#198
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Bus Geek
Join Date: Sep 2014
Location: Eustis FLORIDA
Posts: 23,764
Year: 1999
Coachwork: Thomas
Chassis: Freighliner FS65
Engine: Cat 3126
Rated Cap: 15
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Quote:
Originally Posted by Brewerbob
Or buy a gun and call it done.
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I have one, but I'm not as good as a REAL painter, and I want an awesome job to be done as its a daily driver and all.
A qualified person to spray the paint is worth the $$ and the wait, IMO.
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07-06-2017, 01:29 PM
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#199
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Bus Geek
Join Date: Sep 2014
Location: Eustis FLORIDA
Posts: 23,764
Year: 1999
Coachwork: Thomas
Chassis: Freighliner FS65
Engine: Cat 3126
Rated Cap: 15
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Quote:
Originally Posted by Brewerbob
Find me a 3060 and send Chris up here and you can have him bring my 643 down to you. We both get new trannies and Chris gets a workout. Sounds like a win-win-win to me
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Man, that would be awesome!
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07-06-2017, 01:29 PM
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#200
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Bus Geek
Join Date: May 2009
Location: Columbus Ohio
Posts: 18,758
Year: 1991
Coachwork: Carpenter
Chassis: International 3800
Engine: DTA360 / MT643
Rated Cap: 7 Row Handicap
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Quote:
Originally Posted by Brewerbob
Find me a 3060 and send Chris up here and you can have him bring my 643 down to you. We both get new trannies and Chris gets a workout. Sounds like a win-win-win to me
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ha! i'll WIRE it, but you'll have to do the heavy lifting.. a 3060 weighs what like 600 lbs? you can bench it up there while I fumble around tryoing to get the first 2 bolts started..
-Christopher
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