Firing the Best Employee (And Getting Better Because of It)

“Dynoed” means the engine was tested on a dynamometer (dyno), which measures output like power and torque under controlled conditions. It’s a common way to verify tuning changes and compare builds consistently.

“Triple turbos” means the engine uses three turbochargers to force more air into the cylinders. With multiple turbos, builders can tailor boost response and total airflow, but it also adds complexity to plumbing, control, and heat management.

A wastegate controls boost pressure on turbocharged engines by regulating exhaust flow to the turbo. “Full open” means the wastegate is commanded to dump exhaust away from the turbo, which typically limits boost—so it’s notable when the engine still makes huge power.

“Atmosphere chargers” appears to refer to turbochargers/compressors that are intended to drive boost under normal control. The speaker says they “weren’t going to drive hardly at all,” implying the test setup (wastegate held open) prevented the turbos from producing much boost.

The “2450” is almost certainly the dyno result (typically horsepower or torque) from the engine test. In diesel/turbo tuning circles, dyno numbers are used to quantify how much output the build produces under the test conditions.

“CGI solid block” describes a cylinder block made from CGI (compacted graphite iron), a cast-iron material known for strength and heat resistance compared with many traditional cast irons. The speaker is referencing a specific engine block build using a Hamilton-supplied CGI block, likely for durability under high boost/load.

Crankcase breathers are vents that let pressure and blow-by gases escape from the engine’s crankcase. In this segment, they’re being used as the connection point for a vacuum so the system can pull out hot air during inspection/testing.

A vacuum is being used as a temporary tool to create negative pressure in the crankcase area. That lets the operator pull out hot air while they watch data and make adjustments, effectively turning the engine bay into a controlled test setup.

A precision flow valve is a metering device used to control how much fluid or gas passes through a system. Here, the speaker adjusts it in turns to change engine behavior during testing, implying it affects boost/flow control and therefore how the engine responds under load.

“Running away” refers to an engine overspeed condition where it keeps accelerating uncontrollably, often due to unintended fuel/air behavior. In diesel contexts, it can happen if the engine starts feeding on something other than the normal fuel supply, so the operator fears the engine is no longer under throttle control.

Boost is the extra air pressure a turbocharger (or supercharger) creates to force more air into the engine. More boost usually means more potential power, but it also raises stress and heat, so it has to be tuned carefully.

Rail pressure refers to the pressure of the fuel in the high-pressure fuel system (the “fuel rail”) on a diesel. If rail pressure can’t be maintained under hard pulls, the engine may not get the right fuel quantity, which can limit power and increase the risk of running into unsafe combustion conditions.

Water injection is a cooling strategy where water (often mixed with other fluids) is sprayed into the intake system to reduce charge-air temperatures and help control knock/detonation risk under high boost. The host specifically mentions spraying at the compressor wheel, which is a common way to cool the air being compressed.

The compressor wheel is the rotating part inside a turbocharger that compresses incoming air before it goes to the engine. Spraying water near it is meant to cool the compression process and reduce the heat the turbo adds to the intake charge.

“Blow the thing up” is slang for catastrophic engine failure—typically from extreme cylinder pressures/temperatures, detonation, or fuel/boost control going wrong. In this context, it’s tied to stepping boost/power too aggressively (3000 to 3500) without a safe tuning plan.

An engine dyno measures an engine’s output while the engine is mounted on a test stand. Because the engine is tested by itself, the RPM sweep rate and load are controlled differently than when the whole vehicle is on a chassis dyno.

An RPM sweep is the controlled ramp through engine speeds during a dyno test. The sweep rate (how fast RPM rises) changes how the engine responds, which is why the speaker contrasts different dyno setups and acceleration rates.

The acceleration rate is how quickly RPM and load change during a dyno pull. Slowing it down helps the test produce “real data” because it gives the engine time to stabilize and respond consistently, rather than spiking through the range too fast to measure accurately.

Joss McCormick is referenced as someone who has mastered chassis dynoing. In this context, it’s an enthusiast nod to dyno technique and repeatability—how to run pulls so the data is meaningful.

“Dyno time” means time on an engine dynamometer, where a vehicle’s power and tuning can be measured under controlled load. People pay for dyno runs to verify horsepower/torque claims and to compare setups fairly.

A nitrous bottle supplies nitrous oxide (N2O) to the engine, which can dramatically increase power by adding oxygen and enabling more fuel to be burned. On diesel builds, it’s often used as a short-duration power adder for qualifying or record attempts.

“Motor scatters” is slang for catastrophic engine failure—internal parts break apart or let go under extreme stress. In high-power diesel contexts, it’s the risk when pushing beyond safe limits for fueling, boost, and cooling.

“Columbus diesel 5250” appears to be a turbo model/series used on the motor before switching to Hart’s. In this context, the host is comparing turbo hardware and how it affects power output and combustion behavior.

“14 millimeter pumps” refers to diesel fuel pump hardware sized by plunger diameter (14 mm), which affects how much fuel the engine can deliver. More fueling capacity is often used to support higher horsepower, but it also increases the risk of overheating or engine damage if the tune isn’t managed.

“Hart's 5.1” refers to a specific turbo setup (a “5.1” size/configuration) from Hart’s, used in this diesel build to change airflow and power characteristics. The host claims it produced similar peak power without adding more fuel pump, and it shifted combustion toward leaner/hotter behavior.

“Leaner and hotter” describes combustion that has less fuel relative to available oxygen (leaner), which can raise exhaust gas temperatures (hotter). On forced-induction diesels, this can happen with changes in fueling strategy and turbo/airflow efficiency, and it affects both power and engine safety.

A “triple front pump cover” refers to a specific fuel-pump/cover configuration used on certain diesel engines to increase fuel delivery. More fuel can support higher boost and higher power when the rest of the engine is built to handle it.

“Hart’s 3.6” appears to be a turbo/boost hardware size or configuration used for making big diesel power. The host ties it to displacement-like sizing (“3.6…88 millimeters”) and then to peak output, implying it’s a key part of the turbo setup.

“88 millimeters” is a hardware dimension (commonly related to turbo components like compressor/turbine sizing) that correlates with how much air the turbo can move. In high-power diesel builds, larger millimeter sizing generally supports higher airflow and therefore higher potential horsepower.

“Turbo game” is slang for the turbocharging strategy—choosing turbo size, setup, and tuning to maximize airflow and power. In this context, it’s being credited for the jump to very high horsepower without nitrous.

A rev limiter is an engine control feature that prevents the engine from exceeding a set RPM limit by cutting fuel/spark or otherwise interrupting combustion. The host says the engine’s rev limiter is 6,800 RPM and that it was “beating” that limit, indicating extreme RPM stress.

“Gate it off” likely refers to restricting or controlling airflow/fuel delivery after reaching a target airflow level. In drag/diesel tuning contexts, this can mean using a control strategy to manage how much air the engine gets at certain points to protect components or shape power delivery.

Horsepower is a measure of how much power an engine makes. When someone says “3,000 horsepower,” they’re talking about the engine’s peak (or rated) power output, not just how fast the car feels.

“4.1” is almost certainly the engine displacement in liters (a 4.1L engine). Displacement strongly influences how much air and fuel the engine can ingest, which affects how much power and torque it can make—especially when boosted.

“Stainless turbos” refers to turbocharger components made from stainless steel, typically chosen for better heat resistance and durability under extreme exhaust temperatures. In high-boost builds, material choice can matter because turbos live in a very hot, harsh environment.

In turbo setups, “millimeter” sizing usually refers to the turbocharger’s physical dimensions (commonly the compressor or turbine housing/inducer size). Larger turbo sizing generally supports more airflow, which can translate into higher power—if the rest of the engine can support it.

Foot-pounds is a unit of torque, which measures rotational twisting force. In boosted engines, torque is often what you feel most in acceleration, and it’s also a key stress load on the crankshaft, rods, and drivetrain.

“Across at 5250” implies the engine is making strong torque and horsepower at around 5,250 RPM, not just at one narrow point. A broad powerband (power spread over a range of RPMs) usually makes a car feel more responsive and easier to drive hard.

The oil filler cap is part of the engine’s lubrication system and provides access to the oil fill opening. Removing it while the engine runs can reveal crankcase ventilation behavior (for example, whether there’s excessive blow-by or crankcase vapor).

Crankcase vapor refers to gases escaping from the crankcase, often related to blow-by (combustion gases leaking past piston rings). Excess crankcase vapor can indicate ring wear, cylinder wear, or other issues that also correlate with oil contamination and pressure buildup.

“Motor is really tight” is enthusiast shorthand for the engine having good internal sealing and low internal leakage. In context with “no crankcase vapor,” it suggests minimal blow-by and healthy compression/ring sealing.

The Dodge Charger is a performance-focused sedan (and in some generations, a muscle-car style car) known for strong powertrains and a big aftermarket following. It’s the kind of platform people often modify for boosting and engine tuning, which is why it comes up in a discussion about mastering boost control components like a wastegate. In a diesel/performance podcast context, it’s likely referenced as a project car where tuning and hardware setup matter a lot.

Wide open throttle (WOT) means the driver requests maximum airflow by fully opening the throttle plate (or equivalent control). It’s a common test condition because it pushes the engine and turbo system to their limits, revealing how well boost control and fueling strategies work.

Common rail injectors are fuel injectors used in many modern diesels, where a high-pressure “common rail” supplies fuel to multiple cylinders. They’re known for precise control of injection timing and quantity, which helps power and drivability—especially important when aiming for reliable competitive runs.

Super Stock is a motorsport class designation that sets rules/constraints on what modifications are allowed and how vehicles are prepared. When someone says they want to run “super stock reliably,” they’re usually talking about meeting class requirements while still achieving consistent competitive performance.

“Three pumps” implies a multi-pump fuel system setup, typically to supply enough high-pressure fuel for heavy diesel performance demands. In practice, more pumps can help maintain pressure and flow under high load, but the exact architecture depends on the build.

A rate trace is a graph of how quickly an injector’s output changes over time—basically the “shape” of the injection event. In diesel tuning and testing, it helps you see details like when the injector starts flowing and when it stops, not just how much fuel it delivers.

This describes the injector’s internal valve action: a “ball” seals against a “seat” to control flow. When the ball lifts off the seat, injection starts; when it returns and reseats, injection stops—key events you want to see clearly in the rate trace.

Top dead center (TDC) is the crankshaft position where the piston is at its highest point in the cylinder. The speaker ties this position to compression timing, emphasizing that the piston’s motion relative to TDC determines how effectively the engine compresses the charge.

Dwell time is the period during which the injector is commanded/held in a state that allows it to build flow before the effective injection event. If dwell time is off, the injector may start or stop too early/late relative to the piston’s position, reducing how much useful compression and power you get.

In a diesel engine, the injection rate describes how quickly fuel is delivered into the cylinder during the injection event. Tuning injection rate affects combustion quality, power output, and emissions, especially under high load and high RPM.

Injection off time is the moment the diesel fuel injector stops delivering fuel. Along with injection on time, it helps determine the total fuel quantity and the shape of the combustion event, which can influence cylinder pressure and exhaust temperatures.

Exhaust gas temperatures (EGTs) are the heat levels of the gases leaving the engine. In high-RPM diesel competition, managing EGTs is critical to avoid overheating components and to keep combustion under control.

Timing refers to when key events happen in the combustion cycle—most importantly, when the diesel fuel is injected relative to piston position. In diesel performance, adjusting timing can change cylinder pressure, EGTs, and power.

Cylinder pressure is the pressure inside the combustion chamber as the fuel burns. Diesel tuners watch it because it correlates with how hard the engine is working and can indicate whether timing and fueling are producing safe, efficient combustion.

ECM stands for Engine Control Module, the computer that controls engine functions like fueling and timing. When someone budgets for “motor and your injectors,” the ECM is often part of the tuning and control strategy to make the setup run correctly and safely.

Two-wheel drive (2WD) means power is sent to only one axle, typically the rear axle on many trucks. In high-power diesel builds, 2WD can be harder to control because it has less traction than all-wheel or four-wheel drive setups.

A “common rail” diesel system uses a high-pressure fuel rail that supplies fuel to the injectors. “Cummins common rail” refers to Cummins’ implementation of this system, which is popular for tuning because it supports precise control of injection timing and pressure.

A chassis dyno measures engine output while the vehicle is loaded on rollers, so the drivetrain and vehicle aerodynamics/rolling resistance are part of the test. It’s commonly used for real-world tuning because it reflects how power reaches the wheels under load.

Exhaust valves regulate how exhaust gases leave the combustion chambers. With high boost and aggressive tuning, exhaust valve flow and timing matter for keeping cylinder temperatures and pressure under control and for maintaining consistent combustion.

“Injector on time/off time” describes the injector control pulse width and timing—how long the injector is commanded to spray fuel and when it turns off. Precise on/off timing is critical for diesel combustion because it determines fuel quantity and spray behavior, especially under high boost.

Methanol is an alternative fuel that can be used in some performance diesel setups as an additive or secondary fuel. It changes combustion characteristics (including flame speed and oxygen content), so avoiding it here reinforces that the record attempt is diesel-only.

“Diesel injectors” are the components that meter and spray fuel into a diesel engine’s combustion chamber. In this segment, “dynamite diesel injectors” refers to a specific aftermarket injector brand used by racing teams to support higher power and more precise fuel delivery.

Fuel injectors control how much fuel goes into the engine and how it’s atomized (broken into a fine spray). On high-performance diesel builds, injector choice and tuning can strongly affect power, throttle response, and smoke/combustion quality.

UCC is referenced as an event that will split a weekend with Fast 72. In this context, it’s part of a diesel-truck racing calendar, and the host is discussing how the split affects competitors’ run opportunities and preparation time.

In drag racing, a “hit” typically means a run/attempt down the track under race conditions. Getting only two hits increases pressure on setup, tuning, and reliability because there’s less opportunity to correct issues between attempts.

A drag race truck is a pickup or truck configured to accelerate as quickly as possible over a short straight-line distance. That usually means focusing on traction, power delivery, and gearing rather than everyday comfort or handling.

Truck pull is a motorsport where a truck tries to pull a weighted sled over a track, with the challenge being traction and sustained pulling power. “Truck pull guys” are competitors and builders focused on setups that keep the truck moving under heavy load.

“Dyno guys” refers to people who spend time on a dynamometer (dyno), where a vehicle’s power and torque are measured under controlled conditions. Dyno culture is common in diesel and performance circles because it helps compare setups and tune for real-world drivability.

The Ford Excursion is a large, body-on-frame SUV built on a truck platform, known for its huge size and towing-friendly layout. In this segment, it’s mentioned as the family vehicle the host used to take kids to motorsports events.

In diesel tuning, “nozzles” are the injector tips that control how fuel is atomized and sprayed into the combustion chamber. When people say “90 horsepower nozzles,” they’re usually referring to higher-flow injector nozzles marketed to add power on a specific engine family.

Diesel injectors are the fuel-delivery components that spray pressurized fuel into the engine’s combustion system in precise amounts and timing. “Injector products” here likely refers to replacement or upgraded injector assemblies sold to shops and dealers.

“Behind the scenes” is used to describe operational transparency—showing the infrastructure, people, and process behind the product. In the injector business, that kind of visibility can influence dealer/shop trust because it signals how support, troubleshooting, and fulfillment work in practice.

A diagnostic trouble code (often just called a “code”) is an error identifier stored by the vehicle’s engine computer when it detects a fault. Persistent codes can mean the problem isn’t fully resolved, even if the engine still runs.

DFC Diesel is the podcast sponsor mentioned in the segment. The host frames DFC Diesel as a supplier of remanufactured diesel engines and as a partner that helps answer technical questions for listeners.

Powerstroke is Ford’s diesel engine brand, used in many Super Duty trucks. Mentioning “Powerstroke remanufactured engines” points to a particular diesel platform with distinct components and service procedures.

Duramax is GM’s brand name for its diesel engine lineup, most commonly associated with the Duramax inline-six used in Chevrolet and GMC trucks. In the remanufactured-engine context, it signals a specific engine platform with its own fitment and calibration needs.

ISO 9001:2015 is an international quality-management standard that focuses on consistent processes, documentation, and continuous improvement. In an engine remanufacturing context, it’s used to support that the rebuild process is controlled and repeatable, not just “fixed by feel.”

“Quality testing” and “validation” describe the process of proving that rebuilt components meet required specs and will function as intended. In engine remanufacturing, this is meant to reduce the odds of repeat failures by confirming performance and fitment before the engine ships.

In this segment, “warranty” refers to the coverage provided with the remanufactured engine, which matters because it shifts some risk away from the buyer if the engine fails again. The host emphasizes that the warranty is “comprehensive,” implying broader protection than a minimal parts-only guarantee.

An OEM engine is an Original Equipment Manufacturer engine—built to match what the vehicle came with from the factory. The host contrasts “basic OEM engine” with wanting more capability or durability, especially if the listener’s truck isn’t stock or they’re using it harder than factory conditions.

“Speed of air” is being discussed here as an engine-related series/approach, likely tied to how air is managed for combustion. In practice, these kinds of product lines usually aim to improve airflow efficiency so the engine can make power more effectively and potentially run cleaner.

“Speed of air pistons” refers to a specific piston product line being sold as part of an engine build. Pistons are critical internal components that directly affect combustion efficiency, heat handling, and how much stress the engine sees.

Diesel “lubricity” is the fuel’s ability to lubricate the high-pressure components in a diesel fuel system. When lubricity is too low, it can accelerate wear in parts like fuel pumps and injectors, leading to expensive repairs.

Hot Shot’s Secrets is being referenced as a company that developed a diesel fuel formula intended to improve lubricity. Fuel additives like this are commonly used to reduce wear-related damage in diesel engines when the base fuel is insufficiently lubricating.

A fuel system is the set of components that stores, pumps, filters, and delivers fuel to the engine in the right amount and at the right time. On diesel engines, fuel system health strongly affects starting, smoke, power, and injector wear.

An “EO number” is an identifier used to track a specific injector/part variant and its calibration or specification. In practice, it helps shops source the correct replacement or rebuild parts that match the original design.

Siemens is the supplier mentioned as the original source of these six-liter injectors. Injector manufacturers matter because internal design details (like seat materials and nozzle geometry) affect rebuildability and failure modes.

“Delaminates” means the injector’s seat surface layers separate from each other. When the seat delaminates, the needle valve can’t seal properly, which can lead to internal leakage and degraded spray quality.

Regrinding is a machining process used to restore a worn or damaged sealing surface by removing material to bring it back to the correct shape. In injector work, it’s often used to fix seat geometry so the needle valve can seal again.

“Case hardening” is a heat-treating process that makes only the outer layer of steel very hard, while the inside stays tougher and less brittle. In this segment, the host says the hard outer “case” can delaminate and flake away, which ruins the surface hardness needed for the part to survive.

Rockwell (often shortened to “Rockwell”) is a hardness test method that reports how resistant a material is to indentation. The host is comparing Rockwell hardness targets—about 55–57 versus roughly 18–25—to show that once the case-hardened layer is gone, the part becomes far too soft for the job.

In a diesel injector, the needle valve is the small, precision-moving valve that opens and closes to control fuel delivery. The host warns that if the injector’s internal surfaces aren’t hard enough, the needle valve can pound/wear into the injector nozzle, degrading spray and fueling performance.

The injector nozzle is the tip of a diesel injector where fuel is atomized into a fine spray. The host’s point is that worn or improperly hardened nozzle components can be damaged by the needle valve, which can lead to injector rebuilders struggling with warranty claims.

“Six liter injectors” refers to injector sets intended for engines with a 6.0-liter displacement (common in certain diesel applications). The host is saying they’re producing nozzle blanks that can be installed by injector rebuilders on those 6-liter injector systems.

“Stock flow” means matching the injector/nozzle’s fuel flow rate to the original factory specification. The host says they can pursue emissions-related testing/approval (“carb testing” and “EO testing”) as long as the parts are exactly stock-flow, because that keeps performance and emissions behavior aligned with what regulators expect.

CARB testing refers to emissions compliance testing under California’s Air Resources Board. The host is describing a regulatory pathway for aftermarket parts, where approval depends on the parts meeting emissions requirements—especially when they match stock-flow behavior.