There is always one more thing.
A fitting to change. A wire to trace. A setup that looks right until the whole car has to work together. Anyone who has built a car knows how quickly “almost done” turns into another list.
That is where this 240Z lives. It is a Coolant Killaz project with an old Datsun shape and a very different plan under the hood. This journal is where we put the details, the decisions, and the next steps as the car comes together.
OLD SHAPE. NEW TROUBLE.
The long hood, low roof, and compact proportions are the starting point. We want the 240Z to keep that unmistakable silhouette while the engine bay and electronics move into a different era.
The engine is an RB25 NEO, with CP 86.5 mm forged pistons at 9.0:1 compression and Supertech beehive valve springs. A BorgWarner EFR 8374 twin-scroll turbo sits at the center of the setup. On the intake side, a Plazmaman NEO plenum meets a Bosch 74 mm drive-by-wire throttle.
The hardware gives the project its direction. How it all behaves together will give the car its character. Throttle response, clean running, and a useful power delivery matter every time the car moves, long after anyone has read the parts list.
THE WORK YOU DON’T SEE.
An engine swap reaches much further than the engine mounts. The Haltech Nexus R3 and PD16 handle engine control and power distribution, with a Wiring Specialties harness connecting the setup. R35 coils, a Franklin 12-tooth crank trigger, and Hall sensors are part of the engine’s ignition and signal system.
This side of a build rarely gets the hero shot. It deserves the attention anyway. Connections, sensor signals, and configuration have to make sense together. Getting the engine to start is a milestone; getting the whole car sorted is a longer job.
The fuel system is built around E85, ID1700 injectors, a Radium surge tank, and a flex-fuel sensor. Fuel delivery needs to be checked under load as part of tuning. A turbo’s potential alone cannot tell us what the complete setup will support.
THE DYNO SHEET GETS ITS OWN CHAPTER. FIRST, THE CAR HAS TO EARN IT.
WHAT’S NEXT.
The next chapter is about getting everything ready to work as one car: suspension checks and alignment, the seat and driving position, and a proper tune. Those details belong in the story just as much as the engine does.
The photographs here document the build in progress. We will add footage and a dyno sheet with the conditions behind the numbers when there are results to show. Until then, the power figure stays a goal. This first entry documents the setup and the work ahead.
KEEP THE FILE OPEN.
Coolant Killaz makes room for the process. The films, the music, and the cars all have work behind them that never fits into one finished image. Dispatch is where those pieces get a place.
The 240Z is the first build journal. There will be more to say as it gets tuned, tested, and driven. For now, the file stays open.
DRIVE LOUD. GO FAST.