Turbocharged 6.7L Second Gen Cummins Engine - Engine Builder Magazine

Turbocharged 6.7L Second Gen Cummins Engine

Thanks to attending a truck pull event at an early age, Sean Purdy can't shake his passion for diesel trucks and engines. He recently completed a fresh build on his 1999 Ram 2500 with a turbocharged 6.7L Cummins second gen-swapped engine.

Diesel of the Week is presented by

Engines are inherently cool. That’s not new news to Sean Purdy. He’s been into anything with an engine since he was about 3 years old. From there, it didn’t take long to get into diesels. His diesel passion began with diesel lawn tractors and escalated into diesel trucks after attending his first truck pull.

“As soon as I was old enough to get behind the wheel is when it really started,” Purdy admits.

Ram 2500 truck

Today, Sean manages a large landscape construction company as well as their snow operations. He also has a small business hauling equipment and the like on the weekends. Sean’s work entails plenty of diesel engines, and he bought himself a truck to have some fun with.

“I have a 1999 Dodge Ram 2500, 5-speed with a 6.7L Cummins conversion that is second gen swapped and makes 1000 horsepower,” he says. “I bought this truck pretty well all stock except a few minor engine mods to the VP44 engine. Shorty after I bought it, it got swapped to a P-pump 24v with compound turbos. That lasted for about four months until a third gear heater ended that.

Ram 2500 with Cummins engine

“I then went over the whole truck and re-did basically everything with all new – cowl hood, roll pan, caltracs, head lights, tail lights, all glass and trim, as well as a full paint job. It has the entire original body (no bondo), but was faded from the Arizona heat, so it got sanded down to metal and repainted. Once I got all that wrapped up, I sent it over to the guys at The Delta Speed Shop, and with a little help from myself it got the full 6.7L commonrail swap.”

Purdy says the goal for this truck was to keep it as close to factory looking as possible with a few exceptions. It has a full standalone harness that allows everything to work as factory, including the entire factory dash, warning lights, key, etc. This truck functions as it would from the factory.

6.7L Cummins engine

“We are still working at getting some tuning issues figured out, so I am loading it up and taking it to Firepunk Diesel in the spring,” he says. “The goal is 1000-plus horsepower, which it should make with ease. It’s just my tire-shredding Sunday cruiser!”

The 6.7L Cummins engine features a stock block, rods and pistons, Hamilton valve springs and pushrods, a custom COMP Cams camshaft, ARP studs, and a Fleece coolant bypass to keep #6 cool. It also has a Mishimoto radiator, intercooler and coolant hoses, Flex A Lite fan kit and shroud, Fleece pulleys, a 2006 849 ECM, custom down pipe with the wastegate pipe integrated, and is powder-coated from oil pan to valve cover spacer. 

turbocharged 6.7L Cummins

That’s not all this Cummins has going on. Sean has also upgraded the engine with 170% Industrial Injection injectors, a billet Forced Inductions S476 turbo, a Turbosmart wastegate, a DDP 12mm stroker pump, a FASS 220 lift pump, a billet front cover from D&J, a Steed Speed manifold, custom piping, and EFI Live with DSP5.

It sits lowered 2.5” in the front and 4” in the back with 22×12 Concave American Force Nemesis wheels and 295/40R22 Pirelli tires. Once Sean and Firepunk get this truck truly dialed in, we’ll be anxious to see how it performs and what the next level of the truck might look like from there!

Sean Purdy's Ram 2500 with Cummins engine

Diesel of the Week is sponsored by AMSOIL. If you have an engine you’d like to highlight in this series, please email Engine Builder Editor Greg Jones at [email protected].

You May Also Like

Billet Triple-Turbo 6.4L Cummins Super Stock Engine

During a recent visit to Scheid Diesel, we got to see what goes on in the Terre Haute, IN-based engine and machine shop. We also got a deep dive on the details of a $150,000, billet, triple-turbo, 6.4L Cummins Super Stock engine build. It’s the pinnacle of Scheid Diesel builds, so don’t miss what’s in and on this engine.

Ever since diesel engine work became a larger priority of Engine Builder magazine coverage a number of years ago, it’s been a goal to go visit with Dan Scheid and his team at Scheid Diesel in Terre Haute, IN. We’ve had the pleasure of speaking with a number of top diesel guys and visiting their respective shops over the years, but Scheid was always one that had escaped us – until now.

Triple-Turbo 6.4L Cummins Super Stock Engine

Addicted Performance Diesel prioritizes performance and specializes in reinforcing engines and transmissions for both daily use and high-performance racing. Just take a look at shop owner Jason Stott’s personal Super Stock pulling truck with a triple-turbo 6.4L Cummins engine in it.

1,500-HP 6.7L Cummins-Powered Cuda

The Plymouth Hemi Cuda is a quintessential muscle car for many gear heads. But who knew swapping a compound turbo 6.7L Cummins into a Cuda could make it even cooler? Randy Weaver of Weaver Customs did just that. Check out what went into this unique build!

Turbocharged and Nitrous-Boosted LB7 Duramax Engine

Wyatt Stengel’s 1970 GMC K15 is a cherished family heirloom. However, that didn’t stop him from turning it into a drag racing powerhouse thanks to an upgraded LB7 Duramax engine. Check out what went into the four-year project that blends aesthetics and horsepower.

Compound-Turbo “Shredder” 5.9L Cummins Engine

Like any sensible diesel guy, Chris Voorheis got a small taste of diesel performance and immediately wanted more. His 2006 Mega Cab went from a daily driver to a sled puller to now a formidable drag racing vehicle thanks to a compound-turbo “Shredder” 5.9L Cummins from Industrial Injection. Check out what went into the build!

Other Posts

Turbocharged Billet K24 Honda Engine

Noonan Race Engineering is well-known for its V8 engine platforms, but the shop has now dipped its toe into the 4-cylinder world with a billet K24 Honda engine. The objective – huge horsepower, while keeping factory creature comforts. Check it out!

Noonan’s New Billet K24 Honda Engine

We aren’t trying to hide the fact that we’re impressed by what Noonan Race Engineering is capable of. That’s why we will always jump at the chance to highlight what NoonanRaceEngineering has coming down the pipeline, and the shop’s latest endeavor is a billet K24 Honda engine, which was showcased at the 2023 PRI Show. We caught

Noonan Race Engineering Honda engine
Paul Vasko’s LML Duramax-Powered Diesel Dragster

During our weekend at the 2023 Ultimate Callout Challenge, there were plenty of fun conversations, but speaking with drag racer Paul Vasko was definitely a highlight. His passion is contagious, and his diesel dragster is definitely badass, thanks in part to a turbocharged LML Duramax engine. It’s our Diesel of the Week brought to you

Paul Vasko LML Duramax
Mild vs. Wild: Scheid Diesel and a Pair of 6.7L Cummins Engines

When it comes to building diesel engines, Scheid Diesel is a shop perennially at the top of people’s lists. As such, we made the trip to Terre Haute, IN to visit with owner Dan Scheid and to see the various aspects of the business and discuss the builds of two 6.7L Cummins engines. Check out