โMar-29-2014 04:08 PM
โJan-09-2015 02:56 PM
e-light wrote:Fire Instructor wrote:
So, as you can tell from the updated sig, after more research and test drives, I went with the 6.7L Cummins. Not being sure where DW wanted to go with new 5er, didn't want to come up short on tow rating. The 17,100# that the Cummins provides gives me endless possibilities.
Good choice, it's much better to have more TV than you need than less...makes for an enjoyable ride.
I rode with my brother last weekend while he pulled his 26' TT with his 2012 6.7 Cummins. Amazing motor...seems like it doesn't even break a sweat when it's climbing.
I love my 6.4L gasser. I am extremely impressed with it. But when it's paid off I will be trading it in for a fully loaded Cummins. I've always wanted one...
โOct-21-2014 01:55 PM
ib516 wrote:
RZAR66 -- THIS ARTICLE may interest you.
โOct-15-2014 07:52 PM
โOct-15-2014 09:05 AM
โOct-15-2014 07:15 AM
โOct-14-2014 08:26 PM
ib516 wrote:
I have videos posted on YouTube of testing I have done comparing my 2014 6.4L Hemi to a 2014 Cummins in a 3500 SRW. His is the 370hp/800tq Cummins. Towing 14,000# 0-60 times were the same at 22 seconds. The RV is a 40 foot Cedar Creek Silverback 5er with a hydraulic leveling system and 4 slides.
6.4L Hemi 0-60 towing 14,000#
6.7L Cummins 0-60 Towing 14,000#
Same RV and same stretch of road used for each on the same day.
In my experience towing my RV (we used his for testing), I have found second gear to be ideal. Here's why. Accelerating, it is a big jump from 1st to second, and it does bog for a second or two. BUT, downshifting, it can shift down to 2nd at 60 mph and you're right at ~60 mph at 5000 RPM give or take, right at peak power. The truck (with 4.10s) will do just over 70 mph in second gear before it red lines and upshifts. My RV is 37', has 3 slides, and weighs about 12k. I am completely satisfied with the performance, and my last truck was a modified 5.9L Cummins.
Notice in the video of my truck towing 0-60 that it is still in second gear when I hit 60.
Ram has responded to TFL's video by saying:
"During the Silverado drive, you spoke negatively of the shift calibration. The tested Chevy was we assume hunting between 1st and 2nd gear and ranged from 5,300 rpms and 2,800 rpms, which you didn't seem to like. The Chevy revved very high up the hill for extended periods of time, over 5,000 rpms.
Ram Truck "invented" the first gear hold feature - and calibrated it - to avoid gear hunting and driving at excessively high rpms. Ike is a variable grade and we worked hard to develop a calibration that appropriately manages torque on the run and other grades.
We don't want the truck to rev high for extended periods of time and purposely hold 4,200 rpm.
Bottom line - our truck performed exactly as expected by delivering a more comfortable hauling experience, better vehicle longevity, and improved fuel economy. Time to the top of the hill is only one small piece of the driving experience and our engineers take a number of variables into consideration. Ask yourself if just over one minute is worth other negative driver inputs."
โOct-13-2014 04:14 PM
โOct-13-2014 09:52 AM
e-light wrote:
Today I took my new Ram for its longest tow to date, a 350 mile trek through Ky and and the Smokey Mountains ending the day in NC. This was a good test with light to heavy rain all day, low visabilty and lots of elevation and long sweeping turns at grade. Overall the Ram performed amazingly.
The cargo was my 8000 lb travel trailer, my family of four and my 60 lb pit bull. The 6.4L hemi handled the workload with ease. On flats I was able to run 60-65 at around 2000 rpms in 5th gear. On slight grades 4th gear and 2500-3000 rpms did the trick easily. On severe grades 3rd gear at 3000-4200 rpms was the ticket. 99% of the time the truck stayed between 1900 and 2500 rpms. The low rpm torque is evident, especially coming from a Tundra that loved to rev.
The transmission is also great. In tow mode it holds gears perfectly up grade and downsifts to utilize engine braking on the way down. On severe grades I used the manual mode to hold gears up and down the slopes. I rarely had to use the brakes, only when slower vehicles left me pinned in a lane. And this was all the way through I40 and the Smokey Mountains to Ashville. Quite a workout for sure. The Ram handled it with ease.
Temperatures stayed consistent all through the trip. Coolant running 195-210, oil temp 195-215, trans temp stayed at 160-165.
I am extremely happy with my purchase. I love my truck.
A shot at the campground this evening.
โJun-19-2014 06:33 AM
Fire Instructor wrote:
So, as you can tell from the updated sig, after more research and test drives, I went with the 6.7L Cummins. Not being sure where DW wanted to go with new 5er, didn't want to come up short on tow rating. The 17,100# that the Cummins provides gives me endless possibilities.
โJun-19-2014 05:55 AM
โMay-04-2014 10:11 PM
โMay-04-2014 08:06 PM
Fire Instructor wrote:
VERY helpful thread, Gentlemen! I really appreciate the write-ups. Trying to decide the eternal gas vs. diesel question for me, on my next upgrade. The new 6.4L Hemi may be the answer for me. Wife wants to move to a 5'er in the 33' to 35' range, so definitely going to a 2500โฆ.
ib516, i'd like to get a bit more insight into why you went back to a gasser after 12 years in a diesel.
โMay-04-2014 08:01 PM
โMay-04-2014 12:07 PM
ib516 wrote:
Yes, I noticed that too. Zero wind noise - even in a cross wind where the old truck used to get wind noise at the top of the doors.