Engine is a stock 4.6 DOHC from an 04 Mach1. Radiator is an alluminum FFR with the 16" fan that came with the kit; I did not install a fan shroud. For the first time in two years (track days included), I experienced overheating (210 deg) while in heavy stop & go traffic in the city on an 88 degree day. Would a shroud have prevented this problem or might there be another issue?