It's official. Josh Ayers' '93 Dodge W250 is the cleanest first-gen we've ever seen. It was a long road to get the truck to this level, especially since Josh was a high schooler on a shoestring budget when he built it. Once a rusty work truck, his W250 was originally used to haul hay around the family farm. When Josh's father handed him the keys, they came with a simple set of rules: "You can do whatever you want to the truck—as long as you don't spend any money."
Growing up on a farm (where he tinkered with a collection of John Deere tractors) familiarized Josh with how to work on diesels, so taking on the 5.9L Cummins project was a no-brainer. Throughout high school, Josh invested quite a bit of time, money he'd saved, and effort in his first-gen—but the true payoff was doing most of the work himself and learning along the way.
Aside from a Helix 2 camshaft swap, the short-block is completely stock with 181,000 miles. A set of 60-pound valvesprings was added to match the cam, and 12mm head studs from ARP keep the head secured to the block.
Although a P-pump swap would have been in order for some, Josh loves a challenge—which is why he stuck with the rotary VE injection pump from Bosch for his fueling needs. His inspiration was simple: "The quest was to get more power out of the tiny VE, and the fact that most people say big power can't be had with it."
Josh's VE pump is anything but stock. It uses a 14mm pump head calibrated by Scheid Diesel, which flows some serious fuel to a set of 6x16 Scheid injectors. An Aeromotive fuel pump gets fuel up to the monster VE, and a regulated fuel system keeps fuel delivery as consistent and efficient as possible.
Bringing air into the equation was a vital part of Josh's buildup. You see, unlike P-pumped engines where power can be made at very high rpm, the VE pumps deliver more fuel at low speeds and are spent by 2,700 to 2,800 rpm. Knowing that the VE injection pump would only provide a brief power window, Josh wanted as much air as possible—and needed it delivered precisely within a 200-to-300-rpm range. After trying out several different combinations, he settled on his current twin-turbo setup: a massive HT4B low-pressure unit being spun by an S300 high-pressure unit behind it.
At the heart of the first-generation 12-valve Cummins is a 14mm version of Bosch's VE rota
The only internal upgrades were swapping out the factory camshaft for a Helix 2 unit, and
A massive, HT4B turbo functions as Josh's low-pressure unit in this twin combination. A 3.