Free 7 Day Trial RV GPS App RV Trip Planner Campground Reviews RV Maintenance Free 7 Day Trial ×
RV Trip Planning Discussions

Go Back   iRV2 Forums > MOTORHOME FORUMS > Class A Motorhome Discussions
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 06-14-2013, 11:21 AM   #29
Moderator Emeritus
 
Gary RVRoamer's Avatar


 
Join Date: Jan 2000
Location: Silver Springs, FL. USA
Posts: 24,252
Just as a contrasting data point concerning "proper" RPMs, my Cumins ISL (370 hp version) runs very comfortably at 1300-1400 RPMs and cruises the interstates at 1500. Peak torque is reached at about 1250 and stays flat til about 1500. Peak horsepower is reached at 1800, so 1500-1700 is a good operating range for hill climbing.
The ISL is a bigger engine (8.9L) than the ISC or Cat C7, so it can run at lower RPMs without lugging. Conversely, it cannot run at as high an RPM as the smaller displacement engines, so is governed to 2200 max vs the 2400 max for the ISC.
__________________
Gary Brinck
Former owner of 2004 American Tradition and several other RVs
Home is in the Ocala Nat'l Forest near Ocala, FL
Summers in Black Mountain, NC
Gary RVRoamer 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 06-14-2013, 09:11 PM   #30
Senior Member
 
Jeff753's Avatar
 
Monaco Owners Club
Coastal Campers
Join Date: Mar 2012
Posts: 2,100
Quote:
Originally Posted by Gary RVRoamer View Post
Just as a contrasting data point concerning "proper" RPMs, my Cumins ISL (370 hp version) runs very comfortably at 1300-1400 RPMs and cruises the interstates at 1500. Peak torque is reached at about 1250 and stays flat til about 1500. Peak horsepower is reached at 1800, so 1500-1700 is a good operating range for hill climbing.
The ISL is a bigger engine (8.9L) than the ISC or Cat C7, so it can run at lower RPMs without lugging. Conversely, it cannot run at as high an RPM as the smaller displacement engines, so is governed to 2200 max vs the 2400 max for the ISC.
All great info and I appreciate the shared knowledge. P.s. What's a grapevine
__________________
Jeff
2001 Monaco Dynasty tag axle
2006 Jeep Wrangler
Jeff753 is offline   Reply With Quote
Old 06-14-2013, 09:48 PM   #31
Senior Member
 
Coaster1's Avatar
 
Join Date: Jan 2013
Posts: 371
A mountain pass on I- 5 in CA.
__________________
'92 Gulf Stream Sun Voyager. Tweaked 5.9 Cummins, complete interior makeover (previous owner).
Coaster1 is offline   Reply With Quote
Old 06-16-2013, 07:07 AM   #32
Senior Dude
 
Dogpatch's Avatar


 
Forest River Owners Club
Join Date: Sep 2010
Location: Somewhere, BC.
Posts: 5,601
Blog Entries: 8
I live in British Columbia. It's mountains and steep climbs no matter where I go. Always a challenge. This is my first DP so this is all great info. Thanks All!
__________________
Les (RVM12), Bonnie and 4 legger Shelby
2019 Ram 1500 Limited 5.7 ltr Hemi, 8 Speed Trans. 4x4 CCSB FMCA-420438 Good Sam
Dogpatch 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



All times are GMT -6. The time now is 03:42 PM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2021, vBulletin Solutions, Inc.