When I had them on my Koyo in VA the Z would be ice cold at idle and slow traffic... but as highway speeds and RPM would increase so would the temps... I spent most of my time at that time driving to work on the highway... so I did not like the temperatures I was seeing. I see lower temps more consistantly with the Spals... but I'm an iffy scenario... I have some iffy headgasket problems still lingering... The guy I sold the fans to loves them down in FL. So I'd recommend trying it if you're looking for something to do...
KaZ (VaBch) - "Unique Z"
'84 S12 CA18ET Silvia '88 Z31 VG30E Fairlady Z - Beater '91 Z32 VG30DETT Fairlady Z - Version S '91 Z32 [ Missing ] Fairlady Z - Version S '97 A32 VQ30DE Cefiro SE