So Close To 1st Place, Back To Leave It All Out There | Colt Carter - AMSOIL UCC 2026

“EPA stuff” refers to emissions regulations enforced by the U.S. Environmental Protection Agency (EPA). In diesel performance shops, new or changing EPA rules can affect what modifications are legal, what parts can be sold/installed, and how vehicles must be calibrated to meet emissions requirements.

The discussion centers on service-business lead times—how long it takes to complete customer work—and the challenge of communicating delays. This is a common operational issue in performance and repair shops, especially when workload and staffing are tight.

In diesel performance, “flash” usually means reprogramming the engine’s electronic control unit (ECU) with new software. It’s commonly used to add power, change fueling/boost behavior, or improve drivability, but it’s not automatically the right move for every truck or customer.

A “dead cylinder” means one cylinder isn’t producing power—often due to issues like loss of compression, fuel/spark problems, or internal mechanical failure. When multiple cylinders are dead, it can point to a serious engine condition rather than a simple fix.

“Pull the motor” means removing the engine from the vehicle to access internal components for repair. It’s typically chosen when the problem is deep enough that in-place repairs (like patching) won’t be reliable or complete.

“Rebuild it” means disassembling the engine and replacing worn or failed internal parts to restore proper operation. It’s often the next step when diagnostics show internal mechanical failure rather than a surface-level issue.

“Diagnostic” refers to troubleshooting to find the root cause of a problem before doing repairs. In engine work, paying for diagnostic time helps avoid guessing—like patching something that actually needs a deeper repair.

When the speaker says the EPA “started coming involved,” they’re referring to U.S. Environmental Protection Agency regulations affecting diesel emissions. Those rules can change what modifications are allowed and how shops tune or certify vehicles.

In a truck’s drivetrain, overdrive is a gear ratio that lets the engine spin slower at a given speed. In racing contexts, choosing overdrive (or not) can change how the truck stays in its power band during acceleration and pulls.

A sled pull is a motorsport event where a vehicle pulls a weighted sled over a track. The sled’s resistance loads the drivetrain hard, so setup choices (power delivery, traction, gearing) can make or break the run.

A burnout is when the driver spins the tires to heat them and improve traction before a run. In sled pull/drag-adjacent events, it can help the tires bite, but it can also waste time or stress drivetrain components.

“Quarter” refers to the quarter-mile drag racing distance (a common benchmark for acceleration and elapsed time). Faster quarter-mile performance usually indicates the truck is making more usable power and/or launching more effectively.

“Four length bars” refers to adjustable suspension/control links (often in the rear) used to set ride height, traction, and geometry under load. Changing them can dramatically affect how the truck launches and how stable it stays during hard pulls.

“Spray it” in performance diesel talk typically means using an added fuel/boost system—most commonly nitrous oxide (NOS) or a similar injection system—to increase power for a run. It’s often used strategically when the driver is trying to compensate for unknown traction or setup.

A dyno is a dynamometer used to measure engine and drivetrain output under controlled load. Instead of guessing from track runs, teams can quantify things like horsepower and torque and then adjust tuning based on the results.

A “learning curve” in tuning means the process of iteratively adjusting the setup (like fuel and ignition strategy) and observing results. Even experienced teams can’t fully predict behavior until the engine is tested under real load on a dyno or track.

In engine tuning, “timing” refers to when the engine’s combustion event is triggered relative to piston position. Advancing timing can increase power, but too much can raise cylinder pressures and heat, increasing the risk of knock and mechanical damage.

“Knocked” here points to detonation/knock, where the fuel-air mixture ignites violently and out of the intended timing. Knock is a major warning sign because it can rapidly damage pistons, rods, and cylinder walls.

“Number six piston” means the piston in cylinder #6 of the engine. A catastrophic failure of that piston can indicate severe internal damage—often from extreme combustion conditions—leading to parts breaking through the engine block or even into the cabin.

“Swapping axles out” is replacing the axle assembly (the parts that transmit power to the wheels) as part of rapid repair. In high-load diesel pulls, axles can be damaged by torque, traction events, or drivetrain failures.

In racing, “swapping motors out” means replacing the engine quickly between runs or after a failure. Teams do this to minimize downtime and keep the vehicle eligible for the next pull.

“Water jackets” are the coolant passages built into the engine block and cylinder head. They circulate liquid coolant to control engine temperature; if oil is “puking” near the water jackets, it can suggest oil/coolant contamination or a sealing failure between oil and coolant passages.

“Puking oil out of the head” describes severe oil leakage from the cylinder head area, usually indicating a major sealing or internal failure. In diesel engines, this can point to issues like blown head gasket/seals or a cracked component that lets oil escape under pressure.

The radiator cap regulates cooling-system pressure, which raises the boiling point of the coolant. Removing it during a hot or pressurized situation can be risky, but teams sometimes do it to quickly add coolant when the system is acting up.

“Test fired” means starting the engine briefly to confirm it runs correctly after repairs or component swaps. In motorsport, it’s a quick verification step before the next competitive pull.

The Dodge Ram is a pickup truck platform that’s widely used for work and towing, but it also has a large performance and modification community. In the podcast snippet, it sounds like the discussion is about practical fabrication/fitment—like using hardware to line up a hitch—showing how owners adapt the truck for specific needs. That kind of real-world modification talk is common when people discuss how to get a truck set up correctly for towing or hauling.

The Dodge Charger is a full-size American muscle sedan/coupe that’s commonly discussed in performance circles for its strong aftermarket support and ability to handle power upgrades. In a diesel-performance context, it may come up when people talk about drivetrain “pull” and how the car responds under load. That makes it a frequent subject for tuning, traction, and real-world acceleration discussions.

Nitrous (nitrous oxide) is an aftermarket power-boost system that injects gas into the engine to increase oxygen availability for combustion. In practice, it can dramatically raise power for short bursts, which is why it’s often used in drag racing and sled pulling.

“Dino” is shorthand for a dynamometer test, where a vehicle’s power and torque are measured under controlled conditions. It’s commonly used to compare tuning changes and to verify how much power a build is actually making.

The firewall is the structural panel that separates the engine bay from the cabin. When it’s “fabricated back up” and patched with many holes, it usually indicates major engine or turbo/nitrous plumbing work that required cutting and reworking the engine-bay structure.

An “open diff” (open differential) sends torque to both rear wheels, but if one wheel loses traction, most of the power can go to that slipping wheel. That makes it harder to put power down in high-traction launches, especially with big torque.

“AEM axles” refers to axle components from AEM used in the rear driveline. Axles are critical for transferring torque to the wheels, and when power increases, axle strength and traction strategy (like moving away from an open diff) become limiting factors.

A “spool” replaces the differential’s action so the axle shafts are locked together, forcing both wheels to rotate at the same speed. It improves traction for straight-line launches because power can’t bleed to a slipping wheel, but it can make the truck harder to turn and increases drivetrain stress.

DHD is referenced as the supplier of the “bigger shafts” used with the rear axle setup. In drag and sled-pull builds, stronger axle shafts help handle higher torque and reduce the chance of driveline failures.

“Stepping trans” is a transmission change aimed at better matching gear ratios to the powerband and launch conditions. In high-power diesel competition, transmission gearing is tuned to keep the engine in the right RPM range and improve acceleration consistency.

“Sleeves” are cylinder liners installed inside the engine block to restore or change the cylinder bore. In a high-power diesel, adding new sleeves is often part of rebuilding after wear or damage so the engine can run reliably again.

A “CGI block” refers to a cylinder block made from CGI (compacted graphite iron). It’s used in diesel engines because it can be strong and resist cracking under high cylinder pressures compared with some other cast-iron approaches.

“Solid” in this context refers to a solid-lifter/solid-valvetrain setup (as opposed to hydraulic lifters), which can help control valve motion more precisely at higher RPM. A “stage three” typically indicates a more aggressive performance cam/valvetrain package intended for racing use.

“80 over a 122” describes a turbocharger sizing or compressor/turbine arrangement used for diesel performance. In sled-pull builds, the exact “over” relationship affects spool-up, airflow, and how quickly the engine can make boost under load.

The Toyota Supra is a performance sports car known for its strong tuning potential and track-focused hardware. In the podcast context, it’s being described with specific engine and fueling modifications (like a built/solid block setup, stage-three air setup, and upgraded injectors), which is why it’s relevant to diesel-performance audiences interested in how power is made and controlled. That kind of build detail is typically discussed to explain reliability, airflow, and fueling requirements at higher power levels.

“Injectors” are the fuel nozzles that meter diesel into the cylinders. “Flux 400” indicates a specific injector model/rating, and higher-flow injectors are commonly used to support the extra fuel needed for high-boost, high-power diesel builds.

“48” is a shorthand for a specific transmission model used in diesel drag/sled-pull circles. Transmission choice matters because it has to handle high torque loads and keep the engine in the right RPM band under sustained pulling.

The speaker mentions a “new 72 fast class,” which appears to be a competition class/category that affects who can help and how the truck is prepared. It’s a rules/format detail for the event rather than a technical component.

“Wheel set up” refers to the chosen wheel and tire configuration, which affects grip, rolling resistance, and how the truck’s traction changes under load. In competition, tire choice and fitment can be as important as engine tuning because they determine how effectively power is transferred to the ground.

“Forward length” in a suspension context usually refers to geometry or setup dimensions that affect how the truck’s front end responds, such as link lengths or mounting positions. Small changes can alter ride height, weight transfer, and how the truck behaves during launch.

Qualifiers are the runs that determine starting positions or advancement in a competition. Drivers often use limited qualifying attempts to test tune changes and suspension adjustments before the main event.

An “A to B tune” is a calibration strategy where the truck is set up to perform consistently between two points on the track (or course) rather than chasing peak numbers everywhere. In practice, it usually means dialing fueling/boost/shift behavior for the specific run so the car can repeat its performance during qualifying.

“Shift left to right” is shorthand for changing where the transmission/shift events land in the RPM range during a run. If the truck “shifts left to right” after a tune change, it typically means the shift timing or shift points moved, affecting acceleration and how the engine stays in its power band.

In performance driving, “launches” refers to the initial acceleration from a stop or low speed. How a truck launches depends heavily on traction, suspension compliance, and drivetrain calibration, so testing launches helps predict race-day behavior.

“Dead hooks” is drag-racing slang for a launch where the tires immediately bite and the truck hooks up without excessive wheelspin. It’s usually the goal because it helps convert engine power into forward acceleration right away.

“Five 10s” is shorthand for running in the 5.10-second range in a drag-racing time category (typically a quarter-mile pass). It’s a performance target expressed as elapsed time.

The “sweet spot” is the optimal setup point where the vehicle’s suspension, traction, and weight transfer work together for the best launch and acceleration. For drag trucks, it often means finding the right balance so the tires stay planted under hard throttle.

Horsepower is a measure of engine power output; in diesel drag racing, higher horsepower generally increases acceleration potential. When someone says “2,400 horsepower,” they’re talking about the scale of power they expect from the tuned setup.

In this context, a “roller” refers to a chassis dyno setup where the vehicle drives onto rollers that apply load while measuring output. It’s part of how dyno testing simulates resistance to quantify power.

The speaker is describing the typical endurance/abuse cycle in diesel motorsports: repeated hard launches and passes lead to component wear or failures (“breaking”), which then forces repairs between runs. This “go go go” loop is a major cost and stress factor in competitive drag racing.

“Fire up” means starting the engine after it’s been shut down, often after service, tuning, or transport. In racing contexts, the first “fire up” can reveal issues quickly, especially on heavily modified diesel builds.

“Out-the-door” (OTD) is the total amount paid to buy or fix something, including taxes, fees, and any required charges—not just the base price. When he says “60 grand gone out the door,” he’s emphasizing the full, real cost of the engine failures.

“Send it” is racing slang for going all-in—full throttle or maximum effort—rather than driving conservatively. In the context of engine failures, it implies he was intentionally pushing the truck hard to see what would happen.