RV Trip Planning Discussions

Go Back   iRV2 Forums > THE OWNER'S CORNER FORUMS > Monaco Owner's Forum
Click Here to Login
Join iRV2 Today

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts.
Reply
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on iRV2
 
Thread Tools Search this Thread Display Modes
 
Old 09-18-2014, 08:06 PM   #1
Member
 
RandyS549's Avatar


 
Monaco Owners Club
Join Date: Jun 2014
Location: Westminster, SC
Posts: 34
Turn ISC 315 HP up to 350 HP?

Have any of you had your Cummins ISC 315 HP w/6 speed Allison turned up to 350 HP? My coach has a 4.30 rear end. I know it will be necessary to call Allison and Eaton to make sure the final drive will handle the additional torque from 950 to 1050 lb-ft. I would like to hear about your results.

Back when diesel was near $5.00/gal. I owned a Peterbilt 387 with a C15 Cat, 475 HP and 1650 torque. I had the Caterpillar computer reprogramming done to take the engine to the max of 525 HP. That was all I could get with the computer. The dealership had to verify that the tractor had the heavy-duty drive line. The increased HP took the torque to 1850, and resulted in two-tenths of a mile per gallon improvement in fuel consumption. That may not sound like much, but the tractor was a team truck averaging 250,000 miles/year. Per my calculations, each tenth improvement in fuel economy was worth about $12,000.00 in savings. The additional 2000 lb-ft torque improved the performance of the tractor significantly.

The downside...when the engine was down in the low RPM range on a long pull, we had to watch the pyrometer to keep from cooking the turbo charger.

I am considering making the change. What do you think?
__________________
Randy & Sheron
2000 Monaco Diplomat 38D, 315 HP, 1998 Jeep Cherokee Sport 4X4
1993 Rockwood Embassy E6321, diesel pusher
RandyS549 is offline   Reply With Quote
Join the #1 RV Forum Today - It's Totally Free!

iRV2.com RV Community - Are you about to start a new improvement on your RV or need some help with some maintenance? Do you need advice on what products to buy? Or maybe you can give others some advice? No matter where you fit in you'll find that iRV2 is a great community to join. Best of all it's totally FREE!

You are currently viewing our boards as a guest so you have limited access to our community. Please take the time to register and you will gain a lot of great new features including; the ability to participate in discussions, network with other RV owners, see fewer ads, upload photographs, create an RV blog, send private messages and so much, much more!

Old 09-18-2014, 08:14 PM   #2
Registered User
 
Monaco Owners Club
Join Date: Oct 2009
Location: Varies Depending on The Weather
Posts: 8,517
Do you have the Allison 3000MH?

Dr4Film ----- Richard
Dr4Film is offline   Reply With Quote
Old 09-18-2014, 08:36 PM   #3
Member
 
RandyS549's Avatar


 
Monaco Owners Club
Join Date: Jun 2014
Location: Westminster, SC
Posts: 34
According to the brochure...it is an MD 3060.
__________________
Randy & Sheron
2000 Monaco Diplomat 38D, 315 HP, 1998 Jeep Cherokee Sport 4X4
1993 Rockwood Embassy E6321, diesel pusher
RandyS549 is offline   Reply With Quote
Old 09-19-2014, 05:03 AM   #4
Senior Member
 
D Lindy's Avatar
 
Winnebago Owners Club
Join Date: Aug 2013
Posts: 1,636
OK check what Torque increase you'll be gaining. The $ of the upgrade might not be worth it if the torque gain is very minor.
__________________
2012 Journey 40U (Our Incredible Journey)
2008 Dodge Dakota(TOAD) 2005 Honda Shadow in TOAD
AF-1 braking system
D Lindy is offline   Reply With Quote
Old 09-19-2014, 06:23 AM   #5
Registered User
 
Monaco Owners Club
Join Date: Oct 2009
Location: Varies Depending on The Weather
Posts: 8,517
Allison MD3060P transmission Specs.

I think you're out of luck.

Dr4Film ----- Richard
Dr4Film is offline   Reply With Quote
Old 09-19-2014, 07:46 AM   #6
Senior Member
 
Coma's Avatar
 
Monaco Owners Club
Join Date: Nov 2010
Location: The Emerald Coast
Posts: 1,759
The Allison in my 350HP is a 3066.
__________________
Jim and Jennie, Cats=Bittles and Potter, 2000 Dynasty 350 ISC
2013 Silverado 4x4 Towed with R1200GS in bed.
PROV23:4 Do not wear yourself out to get rich; have the wisdom to show restraint.
Coma is offline   Reply With Quote
Old 09-19-2014, 07:58 AM   #7
Registered User
 
Monaco Owners Club
Join Date: Oct 2009
Location: Varies Depending on The Weather
Posts: 8,517
Quote:
Originally Posted by Coma View Post

The Allison in my 350HP is a 3066.
The Allison MD3066P can handle the increased HP based on these specs.

the MD3060P cannot.

Dr4Film ----- Richard
Dr4Film is offline   Reply With Quote
Old 09-19-2014, 12:59 PM   #8
Member
 
RandyS549's Avatar


 
Monaco Owners Club
Join Date: Jun 2014
Location: Westminster, SC
Posts: 34
Smile It can't be done!

Thanks to each of you for your input. I decided to get my answer straight from the horseís mouth and tracked down Cummins Technical Support. I talked with two different technicians and both told me Iím out of luck. My 2000 ISC is maxed out at 315 HP and canít be turned up by Cummins.

Iím not interested in doing the aftermarket thing to increase the HP. Iím sure Iíll learn to love my 315 horses.
__________________
Randy & Sheron
2000 Monaco Diplomat 38D, 315 HP, 1998 Jeep Cherokee Sport 4X4
1993 Rockwood Embassy E6321, diesel pusher
RandyS549 is offline   Reply With Quote
Reply



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
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
Cummins ISC 350 PID94 error code stkhlm Cummins Engines 6 09-16-2014 07:57 AM
Right signal lights quit working when I turn the headlights on mrbhistory Class A Motorhome Discussions 3 09-03-2014 09:23 PM
Loss of turn signals and flashers jluke Ford Motorhome Chassis Forum 15 06-29-2014 01:51 PM
Turn Signals Light Up When Brake Pedal Is Pushed MarkinOR Monaco Owner's Forum 5 05-06-2014 04:05 PM
Xite Infotainment System - I can't turn off the music! StringFellow Winnebago Industries Owner's Forum 1 04-27-2014 04:03 PM


All times are GMT -6. The time now is 02:33 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2020, vBulletin Solutions, Inc.