Mechanical pumps are making a comeback, and this episode proves they still have a place even as common rail dominates diesel racing.
This episode of the Power Driven Podcast features our crew with special guest John Schirado from Black Tie Race Fab. John is a seasoned racer and fabricator who helped build the Godfather race truck, and he joins us to debate mechanical pump trucks versus modern common rail setups. It’s a back and forth that matters for anyone in diesel performance because it digs into what it really takes to build, tune, and race at a high level.
John shares why he has stuck with a mechanical truck for more than twenty years even though common rail offers easier tuning and consistency. For him it’s about the challenge and the satisfaction of making old school fueling work in today’s competitive scene. We dive into why part selection is everything on a pump truck. Injectors, pump profile, turbo choice, and gear train all have to be perfectly matched because unlike common rail there’s no laptop tune to smooth things out.
The crew also talks about nitrous, automation, and why consistent 60 foot times are the key to winning. John explains how his setup still relies on timers and hand controlled switches while many racers are moving toward bump boxes, staging limiters, and automated nitrous control. That leads to a bigger discussion on how mechanical trucks can adopt some of that tech without losing their raw hands on feel.
Reliability is another big topic. We cover how 12 valve blocks can split around 1500 horsepower, why 6.7 blocks hold up better, and how custom gear cases with straight cut gears become mandatory at the top levels. These are the kinds of hard lessons you only learn from years of racing, wrenching, and breaking parts at the track.
If you’re into diesel performance, Cummins drag racing, Power Driven Diesel, P pump setups, dyno testing, turbo upgrades, and truck builds that push the limits, this episode delivers real shop floor wisdom and racing stories you won’t want to miss.
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