Reply
 
Thread Tools Display Modes
 
Old 12-10-2008, 06:15 PM   #1
Skoolie
 
Train-train's Avatar
 
Join Date: May 2007
Location: Michigan
Posts: 100
Got to go faster.

I have a local truck shop that I have visited to get some ideas from. My bus has a 5.9 Cummins with 4.63 in the rear. They say they can find a better rear for me for six hundred including labor. They were thinking a 4.10. Wound this work for what I want to do?
Train-train is offline   Reply With Quote
Old 12-10-2008, 07:45 PM   #2
Bus Crazy
 
Elliot Naess's Avatar
 
Join Date: Oct 2005
Location: Clearlake, Northern California
Posts: 2,116
Year: 1992
Coachwork: Blue Bird
Chassis: TC-2000 Frt Eng, Tranny:MT643
Engine: 5,9 Cummins
Rated Cap: 84
Re: Got to go faster.


You can make calculations in a jiffy with this:
http://www.idavette.net/tech/ratioc.htm

Simply go to that site and punch in any three of the four numbers, then hit "compute" for the fourth. Magic!
__________________
Elliot
Millicent The Bus - roof raised two feet, toy-hauler tailgate.
http://www.skoolie.net/forums/f11/th...gate-1564.html
Elliot Naess is offline   Reply With Quote
Old 12-10-2008, 07:59 PM   #3
Bus Nut
 
phillbus914's Avatar
 
Join Date: Jul 2005
Location: Grand Rapids, MI
Posts: 786
Re: Got to go faster.

try one of these calculators and see how much that'll affect your RPM's http://www.corral.net/tech/gearcalc.html

4.63 to 4.10 doesn't seem much difference
__________________
My Old Bus :(
phillbus914 is offline   Reply With Quote
Old 12-10-2008, 10:01 PM   #4
Bus Geek
 
the_experience03's Avatar
 
Join Date: Feb 2006
Location: Saint James, MN
Posts: 2,669
Send a message via MSN to the_experience03 Send a message via Yahoo to the_experience03
Re: Got to go faster.

In theory he should be able to hit darn near 80 mph at 2600 RPM assuming he has 10.00R20/11R22.5 tires. That's also not including any tranny slippage. I think 70-75 mph would be doable. That might be worth the $600. The $600 is parts and labor? If so you're getting a deal. I've done some rear ends for smaller stuff and by the time you get a master bearing kit, shims, and the actual gears you can be in it for $250. If you add in the $100-$200 labor (going rate on rear ends) and you aren't but a few bucks short of what they quoted you for a much larger, heavier rear end.
__________________
http://farm4.static.flickr.com/3024/...09f20d39_m.jpg
Skooling it...one state at a time...
the_experience03 is offline   Reply With Quote
Old 12-11-2008, 11:12 AM   #5
Bus Nut
 
CAMO-MONSTER's Avatar
 
Join Date: Nov 2008
Location: OROVILLE, NORTH CENTRAL, WASHINTON
Posts: 295
Year: 1974
Coachwork: CARPENTER
Chassis: GMC-6000
Engine: 454 CHEVY
Rated Cap: 66
Re: Got to go faster.

I WANT TO SWOP THE THERD MEMBER IN MY GM T170 TWO SPEED REAR END
MOTOR CHEVY 454
TRANS NP465 FOUR SPEED
TIRES 9.00 X 20
REAR END GEARS ???????

DO'S ENONE KNOW WERE I CAN FIND A THERD MENBER THAT WILL LET ME
DO UP TO 75 - 85 mph ?


CAMO-MONSTER
__________________
CAMO-MONSTER, 454, sm465, gm t170

the BEAST, 350, 4 sm465, np205,
hd d44 4.56, eaton ff 4.56
CAMO-MONSTER is offline   Reply With Quote
Old 12-11-2008, 02:23 PM   #6
Bus Nut
 
Join Date: Nov 2008
Location: ellijay ga
Posts: 560
Year: 94
Coachwork: b/b
Chassis: tc2000
Engine: 5.9
Rated Cap: 72
Re: Got to go faster.

ok i got a 5.9 cunni with a at 545 with a478 rear and i want to run about 65to 70 and they say i can't turn it up ,,it runs right about 58 to 60 on the hiway ,now this is a 94 bb 5.9 12 vale pump i feel the need for some speed,,,, help or should i sell it,,, now this was told to me by 4 diff cunnins men ,you can't turn it up... HELPPPPPPPPPPPPPPPPPPPP
keith is offline   Reply With Quote
Old 12-11-2008, 06:33 PM   #7
Bus Crazy
 
Steve's Avatar
 
Join Date: Jul 2002
Location: Central Iowa
Posts: 1,838
Send a message via AIM to Steve
Re: Got to go faster.

Quote:
Originally Posted by the_experience03
In theory he should be able to hit darn near 80 mph at 2600 RPM assuming he has 10.00R20/11R22.5 tires.
And assuming it has the power to overcome drag and grade!
__________________
View my 1972 Ward: Topic from the Build : The Picture Gallery
View my 1986 Blue Bird: Topic from the Build : The Picture Gallery
View my 1960 GMC: Topic from the Build : The Picture Gallery
Steve is offline   Reply With Quote
Old 12-12-2008, 12:25 AM   #8
Bus Nut
 
phillbus914's Avatar
 
Join Date: Jul 2005
Location: Grand Rapids, MI
Posts: 786
Re: Got to go faster.

I have the same engine in my bus, with a 4.33 rear end and I can hit 77mph. Not sure what my RPM's are though since I have no tach. I'll tell ya though, I usually cruise 60-65 because fuel economy gets real bad above that.
__________________
My Old Bus :(
phillbus914 is offline   Reply With Quote
Old 12-12-2008, 01:19 AM   #9
Mini-Skoolie
 
Joe Monstermaker's Avatar
 
Join Date: Dec 2008
Posts: 50
Re: Got to go faster.

Just make sure you're never going to need low gear to get moving on a steep grade with a heavy load... ever. Busses have low gears for a reason!
It sucks that the transmission doesn't have enough gears, with a wide enough ratio spread.
Joe Monstermaker is offline   Reply With Quote
Old 12-12-2008, 03:56 AM   #10
Bus Nut
 
CAMO-MONSTER's Avatar
 
Join Date: Nov 2008
Location: OROVILLE, NORTH CENTRAL, WASHINTON
Posts: 295
Year: 1974
Coachwork: CARPENTER
Chassis: GMC-6000
Engine: 454 CHEVY
Rated Cap: 66
Re: Got to go faster.

Quote:
Originally Posted by Joe Monstermaker
Just make sure you're never going to need low gear to get moving on a steep grade with a heavy load... ever. Busses have low gears for a reason!
It sucks that the transmission doesn't have enough gears, with a wide enough ratio spread.
THAT IS WHAT MITE BE GOOD ABOUT MY REAR END WHICH
IS A TWO SPEED.

BUT I STILL WOULD LIKE TO TRY AND FINED HIGHER GEARS
FOR MY DIFF.


CAMO-MONSTER
__________________
CAMO-MONSTER, 454, sm465, gm t170

the BEAST, 350, 4 sm465, np205,
hd d44 4.56, eaton ff 4.56
CAMO-MONSTER 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


Similar Threads
Thread Thread Starter Forum Replies Last Post
Can a transit bus be made to go faster for highway speeds? lornaschinske Mechanical and Drivetrains 5 04-16-2012 11:29 AM

» Virginia Campgrounds

Reviews provided by

Powered by vBadvanced CMPS v3.2.3

All times are GMT -5. The time now is 08:26 AM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2017, vBulletin Solutions, Inc.