Recent Apexi Power FC install and tune on a MY00 GC8.

Vehicle was stock, except for the FMIC, Apexi AVC-R, Apexi Air Filter and 3" TBE. Vehicle also came in with larger injectors that killed the power on this vehicle as can be seen in the power run before tune. Power was at around 135hp and 153Nm at the wheels @1bar. Initial AFRs were shockingly in the 8s and 9s depicted our HKS Knock Amp. Correcting the AFRs brought the power back up instantly.

After the install of the Apexi Power FC, vehicle hit 220hp and 283.7Nm of Torque @1bar. We could only hit 1.06bar max at 4600-5600RPM, while the Apexi AVC-R did a good job of holding the boost flat. A larger turbo with better actuator is needed in this case. Torque was slightly low at 283.7Nm as boost was only @1 bar. We did not go for more timing as the turbine was not pumping enough air.

Overall, good gains were had improvements of over 150Nm and 85hp @WOT and overall driveability was improved through the rev and throttle ranges. A slightly bigger turbo would give this vehicle a lot more gains, with added ignition advance.

Comparison before and after Apexi Power FC Install and tune:


Boost Curve after tune. Bigger turbine pump is needed: