The Brief
This second-gen BRZ came to us with a clear goal, forced induction done properly. The owner wanted serious power on tap with E85 capability, but didn’t want to cut corners on fuelling, engine management, or driveline. The car sees regular spirited driving and the occasional track day, so the build had to be reliable and sorted from top to bottom.
The Build
The full HKS GTIII-RS bolt-on turbo kit went in as the foundation, turbo, manifold, heat-wrapped dump pipe, front-mount intercooler, and all associated charge piping. It’s a complete, well-engineered package that fits the FA24 without major fabrication, and the spool characteristics suit a car that’s still driven on the street.
Where this build steps up from a typical bolt-on turbo setup is the engine management. The factory ECU was removed entirely and replaced with a MoTeC standalone, which gives us full control over fuelling, ignition, and boost strategy. The factory ECU can be made to work, but MoTeC gives us the flexibility to properly calibrate the car for flex fuel operation and dial in the tune exactly where we want it. To support the fuelling side, Xspurt 1050cc injectors and a DeatschWerks DW300C fuel pump ensure the engine has headroom on E85, and a Zeitronix flex fuel sensor lets the ECU read ethanol content in real time and adjust the calibration on the fly.
An Exedy Kevlar ballistic clutch went in during the same stripdown because the factory clutch wouldn’t have lasted with the extra torque. MCA Reds coilovers were fitted and set up with an initial alignment to get the geometry right with the new ride height, giving the chassis the adjustability and control it needs to put the power down properly.
The Result
The BRZ is a completely different car. The HKS GTIII-RS spools quickly and pulls hard through the mid-range with smooth, linear power delivery. The MoTeC tune is clean across both 98 and E85 with the flex fuel system switching seamlessly between fuels. The Exedy clutch handles the extra torque without drama, and the MCA Reds have tightened up the chassis noticeably. A proper full build that’s daily driveable and track-ready.