Tuning rwd supra

Hello everyone I need some help for tuning
A supra HE It is a rwd with stock engine so far it only goes 245mph right before I pass the camera and take the picture I’m trying to get it to go faster but I can’t figure it out any ideas that might get it to go faster anything to tune differently or tips on what to upgrade
Any idea will be very helpful thank you.

Adjust final drive down or up and watch the values that the game gives you. If it has the option upgrade the turbo, twin turbo, or supercharger. If you aren’t worried about class upgrade the drivetrain and engine upgrades to max, which will top out your horsepower.