The Biggest Reason We Love Diesels: More Torque

This week our editors are on vacation, so we're posting our favorite stories worth repeating from the previous year.

Why do we see diesel pickups competing in sled pulls and we don't see Mustangs or Ferraris doing the tug of war? Well, it has to do with torque. Hot cars can master the horsepower game, but when it comes to raw power in a pulling competition, you need to bring in the big dogs for that.

A 2016 article in Car & Driver helps explain what torque is: "Torque is a rotating force produced by an engine's crankshaft. The more torque an engine produces, the greater its ability to perform work." 

You don't need to understand the science to recognize the difference. If you've ever been to a tractor pull, you can see it is a very different experience.

I mention all this because even though diesel engines are far cleaner and quieter than they were thirty years ago, they still get a lot of bad press. Diesel owners have a target on their backs. That's why it is important to remind folks once in a while why half the vehicles in Wyoming are pickup trucks and why diesels still have a function. 

The article that caught my eye is titled, 5 Reasons Why Diesel Engines Make More Torque Than Gasoline Engines. The 2018 Motor Authority story by Jeff Glucker begins, Horsepower is fun in its own way, but torque can be just as entertaining. If you want to rip stumps out of the ground, you'll want a whole lot of torque. That also means you'll likely prefer a diesel engine. Compared to their gasoline-swilling counterparts, diesel engines are the torque kings. Why is that?

Glucker then turns to Jason Fenske from Engineering Explained to get the answer.

According to Fenske these are five of the reasons diesels are Torque Monsters. 

1. The compression ratio

2. The speed of combustion

3. Bore and stroke size

4. Turbocharging

5. Diesel fuel packs more energy density

Fenske explains each of these five points in language that is relatively easy to grasp. For those unfamiliar with these things it is quite eye-opening. I strongly encourage following this link. It's a relatively short article and you will learn a lot.
https://www.motorauthority.com/news/1116200_5-reasons-why-diesel-engines-make-more-torque-than-gasoline-engines

For more, check out the article Torque vs. Horsepower: What's the Difference? (Car & Driver)

The Legendary First-Generation Cummins 6BT Diesel Engine

You can tell who the diesel guys are by the way the write about diesel engines and diesel power. From the getgo, there's a sense in which we're always having to be a little defensive, write in a more calculated manner. 

So it is that Henry Cesari's article Monday at Hot Cars begins with this observation: "Diesel engines are divisive: there are many unfair myths surrounding diesel engines." It's almost as if he's saying, "Let's get this out of the way. If you don't like it when I write about diesels, go read something else." We like it and yes, we know diesels have pros and cons, but they're not going to be extinct any time soon. Their role is currently too important.

This article is about when Dodge trucks were mated with Cummins engines to produce the popular, much-heralded 1989 Dodge Ram. It's titled, Looking Back At The First Generation Cummins-Powered Dodge Ram Truck.

It's a great story. From initial vision to completion it took more than five years. When I think about how impatient everyone is today it's obvious that it takes real resolve to complete truly great projects. In most cases--the exception being the Harrier jet--the bigger the plane, the longer the runway required to get it off the ground. Kudos to Dodge and Cummins for their determination and commitment.

Dodge was famous for its trucks long before the Cummins-powered Dodge Ram. The Power Wagon and the Li'l Red Express, for example, were exceedingly popular. Today, 75% of Dodge Ram 2500 and 3500 buyers opt for the Cummins engine option, which is able to tow nearly 15 tons with ease.

Cesari not only did his homework, he produces a stimulating read, writing "when thirty years ago, Dodge shoe-horned a Cummins-built diesel engine--intended for heavy equipment use--into their Ram pickups, the two companies incited a diesel revolution. Today, we're looking back at the Cummins-powered 1989-93 Dodge Rams." 

It's surprising how much was involved with making it work. In addition to an impressive engine makeover they followed up with 11 million miles of testing to ensure they'd actually produced a a power plant that was strong but that would also last.

According to Cesari, the Cummins team overbuilt every aspect of the new 6BT engine. The engineers incorporated "seven main bearings on the crankshaft, and six head bolts for every single cylinder. The company built both the block and head out of cast iron. They spared no expense in forging, hardening, and testing components such as the crankshaft, the connecting rods, and the pistons. When Cummins purchased components from outside vendors, they opted for the highest possible quality: the injector pump and the injectors are all durable Bosche units." 

The Cummins-powered 1989-93 Dodge Rams were pretty special. They set the bar high for everything that would follow. The Dodge team knew there could be no shortcuts. Their reputation was on the line.

Read the full article HERE at HotCars..com

For another fun Cummins/Dodge related read this one by Michael Van Runkle also, about a slammed 2019 SEMA special that features a 5.9-liter Cummins turbodiesel engine, stacks, and drop dead good looks.