Hey, I just RM my Corvette Z06, hoped to gain some hp, but instead I lost 150hp, even with all parts put back. Without all tuning except Engine3 I've only 530hp. I have tried to change the oil, but it makes no difference. Anyone got some ideas what to do?
When you RM a car it takes off all engine mods you've already done. Go into the tuning menu for your car while inside your garage, or before a race, and re-enable the mods you've done.
edit: one other thing, you may have to go into your items list on the main menu and re-apply engine tuning levels if you've done those as well. Don't ask me why the game does this, it's quite ridiculous.
Racing Modification, found in GT Auto section