NFSUnlimited.net

This is unfortunate.

If you're doing an objective which specifically requires a huge amount of SP in a single session, I would recommend switching to a private game until you complete the speedlist.

Not entirely sure but I believe each car has an initial heat level based on their tier, which you can increase by purchasing performance and pursuit upgrades but there is a max limit for each car. For example, I think you can upgrade a tier 1 car with a base heat of 1 to heat 3, tier 2 with a base h...

Have you been able to get it to work since?

Sometimes Turbo will fail if you're hit with Pursuit Tech or another car, but the SFX can still play. :/