Barn Find Gold!

Cletrac created a new market segment in 1916 when it introduced the diminutive model R crawler. When Rollin H. White founded Cleveland Motor Plow Company in…

Sizing Turbos for Diesel Engines

Diesel guys are number guys whether they know it or not. You’ll see the Big Three touting numbers in all of their ad campaigns: best in class towing, most torque, highest horsepower. In a day…

Project Obsessed

Part eleven of this project build. Can you believe it?! Almost an entire year into this old Ford build-up and we’re rounding third headed for home. This…

Cool It

We know what you’re thinking. Another article about how to save a 6.0L Power Stroke form imploding on itself. Well sort of, but the truth of…

WHAT MAKES THE CUMMINS SO GREAT

The Cummins. It’s the engine that brought inline-six architecture, direct injection, the P-pump, and true, industrial-level strength to the ¾-ton truck…

RPM Offroad 2014 Open House

The 2014 RPM Offroad Open House/Dyno Day got off to a soggy start with rain throughout the previous night and into the morning. Normally spring weather in Bristol, Tennessee, is sunny…

1951 Sheppard Diesel SD-3—The Best Tractor You Never Heard Of

In the late ’40s and early ’50s, diesel powered tractors were just starting to increase their market share against gasoline and distillate (kerosene) power tractors. It was…

Inside a 3,000-HP Injection Pump: Scheid Diesel’s Incredible 16mm P7100

The function of a P-pump is relatively simple, although it may take a few readings to understand. The pump basically acts like a small engine, but instead of compressing air, the rotating…

Make 600+HP Under the Radar: Duramax Tuner’s 2001-2004 LB7 Stealth 64 Turbocharger

With these modifications taken care of, the real performance-limiting factor with the LB7 Duramax is the factory IHI turbocharger. While the stock…