ah, yes , the Turbo.
does the Rival has more turbos then the player?
Viewing post in What can I add or change to improve the game?
Yes and no. They follow the same rules as you do: overheat the engine and the turbo won't be available. But those bastards immediately start with an L3 radiator.
However, I've found the problem. It's something that I changed a while ago. I reverted it and now they only use the turbo on long straights.
I've also rebalanced the ai difficulty. Easy and intermediate are now easier.