Ram 2500 with 6.4 Hemi for 5th wheel

What it has to do with the OP's original question is that you shouldn't be afraid of a gas engine. My last 3 TV's were 454 gas, 7.3 diesel, and 454 gas and they all pull the same. A gasser is cheaper by far to fix, and you don't get the stink eye coming in after 6PM. Or from the neighbors at 6AM. When was the last time somebody had a 14 page thread about being stranded somewhere in Kansas because nobody knew how to fix their gasser?

Wiley75 wrote:
Not sure what all of this has to do with the OP's original question. Gas is working harder than diesel, etc etc. Whatever.

I'm also curious about the 6.4 hemi performance while towing heavy loads like a 10K lb 5er. Hopefully somebody will chime in with some real world experience.

The OP asked for experiences towing with that vehicle. Someone with a 5K tiny 5th could say "great!" and it doesn't apply at all when the OP has something different.

It's all in the details, which weren't provided in the original post.

Not sure what all of this has to do with the OP's original question. Gas is working harder than diesel, etc etc. Whatever.

I'm also curious about the 6.4 hemi performance while towing heavy loads like a 10K lb 5er. Hopefully somebody will chime in with some real world experience.

bucky wrote:
Horsepower and torque being equal, a gasser works no harder than a diesel. The difference is the RPM where the sweet spot occurs.

The very first sentence makes this a pointless comparison because you aren't going to find any current gas and diesel truck engines that are rated at the same TQ, not even in the same ballpark...

Ventureman wrote:


NO! If the gasser is rated at that RPM then it's not "working harder" than a diesel turning at its rated RPM. As to fuel consumed, the diesel engine isis more efficient at doing work.

The part you may be missing though is the diesel makes its power in the cruising RPM range while the gasser makes its power well above the cruising RPM range.

Therefore the gasser is working harder because it isn't within its power band RPM range.

M.R.E. wrote:
My trailer weight is about 10,000lbs loaded. But that has no bearing to the question.

Don't get into a back and forth with posters that continually hijack topics with their weight police comment nonsense. Ignore their off topic questions or comments as it leads to the direction your topic has been taken.

I too am looking at the new 6.4 Hemi to replace the wifes 1500 chevy 5.3 4x4 crew cab truck as it should be a hands down better gas towing machine with 410/429 hp/torque numbers than the smaller 5.7 hemi.


IMO the 6.4 hemi is getting closer to a actual big block towing performance numbers we lost when the 8.1/V10 gassers were taken off the LDT line up, than the current crop of 5.6 to 6.0 small block gassers.

Sorry about the above post, I kind of botched the editing. I think you all get the idea...

Posted By: mileshuff on 11/12/13 02:40pm

bucky wrote:

Horsepower and torque being equal, a gasser works no harder than a diesel. The difference is the RPM where the sweet spot occurs.


Define 'works harder'. If an engine must turn higher RPM's and use more fuel to handle the same load, speed etc as another engine isn't it working harder?

bucky wrote:

Horsepower and torque being equal, a gasser works no harder than a diesel. The difference is the RPM where the sweet spot occurs.


Define 'works harder'. If an engine must turn higher RPM's and use more fuel to handle the same load, speed etc as another engine isn't it working harder?



NO! If the gasser is rated at that RPM then it's not "working harder" than a diesel turning at its rated RPM. As to fuel consumed, the diesel engine isis more efficient at doing work.

Have a 454 GMC Dually with a 4.10 rear end, pulls fine yes some hills do slow me down a little but I don't struggle.
On my recent return trip to Key West I went over the beautiful hills of Texas and beyond on I 10, On the return up through Georgia and South Carolina and back down the I20 then the I 10. Overall. I find the Gas motor cheaper to repair and maintain and the difference in fuel costs is now averaging 95 cents between diesel and gas in Dallas. Although Florida is also high for both but less of a difference. At a rough calculation the average cost difference between gas and Diesel is 78 cents. Oh and I average 10.5 to the gallon, which in comparison to Diesel owners I spoke to is what they get with the Chevy 3500 duramax.

bucky wrote:
Horsepower and torque being equal, a gasser works no harder than a diesel. The difference is the RPM where the sweet spot occurs.

Define 'works harder'. If an engine must turn higher RPM's and use more fuel to handle the same load, speed etc as another engine isn't it working harder?