Over a range of coil-to-tube diameter ratios from 10 to 26, apparent Reynolds numbers (Rea) from 10,000 to 56,000, apparent Prandti numbers (Pra) from 5 to 13, and polymer concentrations from SO to 200 wppm, the fully developed turbulent Fanning friction factors and Nusselt numbers for aqueous polymer (viscoelastic) solutions in helical coils were measured experimentally. The flow passage is about 600 hydraulic diameters long. The test section wall was heated by passing direct electric current through it, yielding constant peripheral wall temperature and constant heat flux per unit length along the flow direction. For moderate concentrations of the polymer, the viscoelastic fluids were found to be better heat transfer fluids in compact heat exchangers employing helical coils.