[youtube https://www.youtube.com/watch?v=KVbWApPV-EU]After much testing, Broughy1322 released a second video where he’s shares the finding that the turbo upgrade available at Los Santos Customs in game actually makes your car far slower! It’s not insignificant too, Broughy1322 lost a whole second on a long straightaway after putting on a turbo, making it slower than if the car was stock! The video was also shared on this gta forums thread.
My advice? If you’re an avid car collector or racer in GTA like myself, take off your turbo and spam Rockstar support so that they are aware of the problem. Considering that the turbo is the most expensive upgrades (upwards of 30000 in online depending on the vehicle), I feel like that when the bug is fixed that we should be able to replace the turbo for free.
[youtube https://www.youtube.com/watch?v=C9kTLFk8JGM]
Hopefully this gets fixed soon as it really is an expensive detriment to the quality of racing both on and offline. While you wait for a patch, enjoy the fact that next gen GTA V allows you to play as animals and maul innocent civilians. Have fun!