Primarily focused on the legendary 5.9 Cummins 12v and 24v and modern 6.7 Cummins engines, we cover everything from common problems and maintenance content, to best performance modifications, tuning guides, and more. Additionally, we dig into various other Cummins engines like the 8.3L and the 5.0L.
A new problem has developed on the 6.7 Cummins, and it’s happening at an alarming rate, enough for us to now consider it a common problem. The factory grid heater has a bolt and stud on the bottom side of it. From heat and deterioration the bolt has a tendency to fall off, which then…
Tuning is the best performance modification for a 5.9 Cummins. It offers huge power gains and the lowest cost per horsepower of any other modification. But there are a lot of considerations and options when it comes to choosing the right tuner for your goals. Tuning is very different for the VP44 engines from 1998.5-2002…
The 5.9 Cummins 24v is known for its incredible reliability, but is also well known for its performance potential. While CP3 versions of the engine are going to be the most capable, even the VP44’s can produce some decent power levels with just tuning and a few bolt on modifications. In this guide we’re going…
While the 6.7 Cummins turbo-diesel is one of the best modern power plants on the market, it is far from a perfect engine. Unfortunately, one of the biggest issues is the Holset HE351VE turbocharger and VGT actuator failure. When the actuator fails you will run into a number of performance related issues like a loss…
For over a decade now, the Ford 6.7 Powerstroke and Dodge’s 6.7 Cummins have been the top of the line for turbo-diesel power plants. Yet, besides their displacement, they actually share very little in common. For starters, the Powerstroke is a V8 while the Cummins is an inline-six. However, they are two of the most…
If you were looking for turbo-diesel power in the 1990s and early-2000s, you had two main choices: Ford’s 7.3 Powerstroke V8 or Dodge’s 5.9 Cummins I6. These were some of the first modern diesels to have direct injection and turbochargers as standard, opening up entire new worlds of performance opportunities. Though now long out of…
Since it first became available for the 2007 model year, the 6.7 Cummins has made a solid name for itself as one of the most powerful and dependable turbo-diesel truck engines. Over the years there have been a number of design changes and problems to be aware of, however. In this guide we are going…
Power output was decidedly modest for the 5.0 Cummins, at just 310 horsepower and 555 lb-ft of torque. Fortunately, engine tuning and some bolt-on performance mods can take this engine to the 425whp range for just a few thousand dollars. Pushing too much beyond these power levels get expensive and starts to sacrifice reliability, which…
While it has been out of production for almost two decades, the 24v 5.9L Cummins is still widely regarded as one of the best turbo-diesel engines ever made. Also known as the 5.9 ISB, the engine was the successor to the beloved 12v Cummins. Dodge produced the 24v Cummins from 1998–2007, where it made 215–325…
The 5.9 Cummins 12v earned a legendary reputation for reliability. The engine is also extremely strong, making it a prime candidate for performance modifications and upgrades. However, these engines are mechanically driven which makes them a bit more challenging to modify. While it isn’t as simple as just dropping a tune on it, there are…
Tuners are easily the best bang-for-the-buck mod for the Dodge 6.7 Cummins. We discussed tuners in our 5 best 6.7 Cummins mods guide, and had them at the top of our list as the best performance upgrade. Tuners can provide significant power gains from a simple plug and play device. There are a lot of…
The Cummins R2.8 turbo diesel crate engine is also known as the Repower 2.8. This small inline-4 diesel engine initially hit the markets around 2017. However, it’s not a very well known Cummins engine due to its competition with the legendary 4BT. Still, the R2.8 is a compelling diesel engine with plenty to offer. In…
