ram 6.4 hemi

wmonroe · Apr 29, 2014

762MM said:
2500 w/6.4L ordered and now in production. Let the wait continue 6-12 weeks.

Congrats, Be sure to post some pics when you get it.

handirifle · May 1, 2014

DeereMann said:
"Several companies are producing engines that meet EPA standards without urea systems, already, and it's only a matter of time before they all do."

I don't believe this is accurate. The reason that 'others do' was for lower mileage engines that didn't need the fuel efficieny. It is well known you don't need SCR if you don't create the NOx. The way you don't create the NOx without an SCR is by severely retarding the fuel injection timing & adding EGR. Then your fuel mileage goes way, way down. Ask Navistar how that worked out for them (now buying Cummins engines). Heck, CAT got out of the on highway truck business for that reason.

And finally, Cummins first ISB6.7 (Ram) engine recipe had no SCR - but the fuel consumption was so high & they got so many complaints they changed to SCR a few years back just to get the mileage up.

Reducing NOx is not that simple. Gasoline spark ignited engines don't make nearly the NOx that diesels do - because they aren't as efficient, they don't burn as hot.

Mazda is producing one (not here yet) and so is Honda, also not here yet. There is one other but name brand escapes me for the moment. As for Dodge, their mileage sucked because they were using a 7th injector in the exhaust to overheat the exhaust to burn off the soot in the DPF. To me it's a matter of the engine makers "learning" how to do it right. Go back to the 70-80's and look at the engines that were produced that "met emission standards" of the day. Good Lord. A 460 cu in engine that produced under 300hp, and got about 7 mpg, but boy was that "clean". As posted earlier, the people need to get control of the EPA, they are controlled by world interests that have NOTHING to do with cleaning the air. They want to force combustion engines out of the system, whether diesel or gas. Look at the "new" standards they are creating for the next 10 years. It's mind boggling.

Back to the 70's, the engines produced pathetic power because they often lowered compression to about 7 to 1 in order to "clean" them up. Of course the fast that they used twice as much gas to do the same work was of no consideration. We need to look at emissions per mile, instead of emissions per gallon as we currently do.

Just as Ford figured out that opening the exhaust valve much earlier in the lower RPM range to "pre-boost" the turbo in order to get the low end torque the Eco Boost is famous for, I predict diesel engine builders will do similar things to make the exhaust hot enough to make it "clean" so the greenies can't sniff it. The people in this country are really starting to make me very scared. It's not OK for a little diesel smoke (or CO2) to come out a tail pipe but boy lets stuff as much weed into our brains as we can, LEGALLY, no damage done there.

I do not believe the diesel is going away, in fact, as I said, it will only get better. Heck Mercedes has been at it for many years, now Honda, Mazda, and BMW are getting into it. Race cars are embracing the diesel engine as well. Not just the truck drags, but SCCA cars as well. There's no way these guys will invest millions on dying engine technology.

Some of them are producing 400+ hp from 2.0L engines with 600+ torque. To put it to the ground all that's needed is gearing. Plus that low end torque is a dream come true for coming out of the corners. Sure you can gear a gasser down to keep the revs up but that's more shifting, more gears needed to keep them in the curve. Of course diesels do suffer from the opposite end of torque drop off at higher RPM, but not as much in race applications where engines regularly hit 5-6K rpm.

handirifle · May 1, 2014

Anyway, I'll shut up about diesel, and let the OP enjoy his new truck. As I mentioned, I'm glad the auto makers (or at least Dodge) has finally put the grunt where it need to be. One guy we RV with has a Ford F250 with the 6.0 (I think) and 6spd auto, and he loves it for a lot of the reasons you guys cite here in a gas vs diesel debate. As he said he pulls hills slower, but makes up for it on the flats. His words not mine.

762MM · May 27, 2014

It took about a month from order to delivery. Mandatory pictures follow. Sorry about the quality - rain and clouds now and expected the next couple days.

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