Unless you are running an unsheilded open cone, you really dont have too much to worry about, espeically on a turbo car with an IC to help with charge temps. Heat soak is really an issue for N/A cars when every degree of charge temps helps. An open-cone on an R32 would have it bogging down and struggling at low RPM.
At speed, it becomes less of an issue as cooling is for more efficient and air is being delivered through the intake at higher pressure.