Triple Turbo 6.7L Cummins-based Enforcer Engine - Engine Builder Magazine

Triple Turbo 6.7L Cummins-based Enforcer Engine

We caught up with Justin Zeigler of Zeigler Diesel Performance as he prepares for his third crack at the King of the Street Challenge and his first Ultimate Callout Challenge invite utilizing a 2006 Dodge 2500 and a triple turbo 6.7L Cummins-based Enforcer engine under the hood. Find out what went into the impressive build.

Diesel of the Week is presented by

We last spoke with Justin Zeigler of Zeigler Diesel Performance last September about his burgeoning diesel business (now four years old) and a 400,000-mile 7.3L Powerstroke he was rebuilding. With Justin and his shop crew just a short distance away in Canton, OH from our Akron, OH office, we recently got back in touch with Justin as he prepares for his third crack at the King of the Street Challenge (October 16-18, 2020) and his first Ultimate Callout Challenge invite (May 21-23, 2021).

Justin has always had a knack for competition and a desire to prove himself against the best of the best, and this third run at the King of the Streets (KOS) is no exception.

Justin Zeigler (center) and his team at Zeigler Diesel Performance in Canton, OH.

“We’ve done KOS all three years they’ve had it,” Zeigler says. “We didn’t really hold anything back with this truck. We wanted the best of the best.”

Zeigler’s 2006 Dodge 2500 four-door, short bed truck recently got outfitted with a 6.7L Cummins-based Enforcer engine from Drew Pumphrey and the guys at D&J Precision Machine.

“We went to D&J Precision Machine and they just built us a new Enforcer engine with the best of everything they have to offer,” he says. “The Enforcer engine is built off of the 6.7L platform. It is a 6.7L crank and a 6.7L block. It does get machined out for sleeves and a deck plate – the whole nine yards. This particular Enforcer is set up to flow coolant, so we can do the 100-mile street drive at KOS. This will be the same engine we’re going to compete with at UCC as well.”

The Enforcer engine is all done by Drew and D&J Precision Machine, both inside and out. Drew designs and makes his own pistons and rods, among other components for the platform.

“It’s all his recipe,” Zeigler says. “When it comes to building big horsepower engines and making them live, (Drew) is the man. I give him an idea of what I want to do with it and let him run. This engine has his pistons, his rods and basically all his whole setup. It also has his billet main caps in it and his bigger-than-factory head studs. It’s got roller bearings for the cam and roller lifters.

“This Enforcer engine is also using D&J’s old-style Stage 3 head. The reason we’re doing that is the way my pump configuration is we can’t fit the Stage 4 intake in a factory firewall, dual pump set up. We also used Exergy 500% injectors in it and Exergy pumps. We got Stainless Diesel to build us a triple turbo setup. They built us all the turbos and I had a local friend of mine who owns SloshFab build all the piping and he did the welding and fabricating as well.

“The three-turbo set up on this truck does things that everybody said it wouldn’t. It drives incredibly nice and comes right up on boost. It’s not laggy and it does everything we could ever want it to do.”

Behind the triple turbo Enforcer engine, Zeigler called on Firepunk Diesel to build their latest and greatest Comp 3 transmission, which Justin says he has two of.

“We keep a spare, because at this power level and being in competition, you’ve got to have a spare just in case,” he says. “We never think anything is going to go wrong, but anything can happen. I just picked up the truck from Firepunk, and Cody down there just did the whole four link set up on the rear suspension. It is just incredible. His welding and fabrication skills are absolutely next level.”

With the truck nearly dialed in for KOS 2020 in mid-October, Justin has his sights set on winning the multi-dimensional competition.

“Basically, you have three complete different setups to bolt on the truck,” Zeigler says. “We do elimination-style drag racing and a 100-mile street drive. If you can’t complete the 100-mile street drive, you can’t compete any further. If you have to stop for any reason, you’re immediately out. The points for completing the street drive are double what it would be to win any other event.

“Not only do you have to drag race and go on a 100-mile street drive, but you have to do a chassis dyno competition for the highest horsepower, and then you do dirt drags for 250 feet, which is a really wild ride in something of this caliber. Then, you have to sled pull twice.”

Adding to the difficulty level of KOS is the fact that each truck entered in the competition has to be based around being DOT legal, meaning DOT tires, full sheet metal and street legal – the whole nine yards.

That being the case, Justin is still pushing the limits of his truck and hoping that the third time will be the charm at KOS this year.

“My goal with this engine is anything north of 2,500 horsepower at the tire,” he says. “The truck earlier this year did almost 2,000 hp on fuel only, and we have three nitrous kits from Nitrous Express on the truck for the dyno. We’re going to turn them on and see what she’ll do.”

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

You May Also Like

Compound Turbocharged 6.7L Powerstroke Engine

With a background in farming, Tanner Allison grew up with a passion for diesel trucks and engines. He also gravitated towards the Powerstroke platform, and has since set his sights on showing what a 6.7L Powerstroke engine can do. Check out Tanner’s most-recent diesel build!

We love when we get messages and comments on our social media pages from our audience telling us about a build they’re working on. The projects never cease to amaze us, and we recently got a note from Tanner Allison who hails from Iowa. Tanner has grown up around the farming industry, and thus, has a knack for diesel trucks and engines.

Compound Turbocharged 6.0L Powerstroke Engine

Eric McMichael of McMichael’s Diesel Performance is a Ford guy through and through. His passion for the Blue Oval shines bright in his 2004 F-250, which features a compound-turbo 6.0L Powerstroke engine. Check it oit!

Compound-Turbo 6.0L Powerstroke Engine

Justin Gerebizza acquired a fully built ‘06 F-350 looking to achieve the 1,000-hp mark with a compound-turbo 6.0L Powerstroke engine. This Diesel of the Week is even more impressive when you realize it was built in 2015.

Turbocharged LML Duramax Engine

We all know Tony and Tyler Burkhard of Dirty Hooker Diesel have some awesome drag racing and truck pulling Duramax powerhouses. But, the shop’s employees also have some awesome diesel combos. Check out Evan Berry’s turbocharged LML Duramax diesel engine!

Chase Wells’ Turbocharged 6.8L Cummins Engine

Chase Wells and his team at 1 Way Diesel Performance are capable of all sorts of different diesel builds from show stoppers to all-out race vehicles. This week, we highlight one of Chase’s own trucks, which features a single-turbo 6.8L Cummins engine! Check it out.

Other Posts

Custom “Kingpin” Truck Features D&J’s Compound-Turbo 6.7L Cummins Engine

We had heard from D&J Precision Machine owner Drew Pumphrey that he’d have something special in the 2023 PRI booth, and he wasn’t lying. The custom-built “Kingpin” F600, done by Classic Car Studio, needed an engine. For that, they turned to Drew and the guys at D&J Precision Machine for a compound-turbo 6.7L Cummins engine.

Firepunk Diesel Race Team Sets New Pro Mod Records

Firepunk Diesel’s 1970 Duster is now quickest and fastest with an ET of 4.101 and a recorded 194.41 mph.

Trucks on Trucks at Summit Diesel

Summit Diesel does work on Cummins, Powerstroke and Duramax platforms, from maintenance and repair to full engine builds.

Summit Diesel
AMSOIL 5W-40 Synthetic Metric Motorcycle Oil

AMSOIL 5W-40 synthetic metric motorcycle oil is designed to excel in all areas unique to metric motorcycles, including high engine rpm, wet-clutch lubrication and extreme-pressure regions of gears.

AMSOIL motorcycle oil