I can only offer a small bit of help, my fan is a SPAL #30102120 with the straight blades and it moves 1918 CFM of air in puller mode. It keeps my engine cool without the need for the dual pusher fans. BUT, the dual pusher fans do drop the heat faster when I do turn them on and they work in conjunction with the puller. And in case anyone is curious, those pushers are Dayton 3LCH7 fan motors. I've also always used
Watter Wetter. Does it really work? I don't know -- the boys at ERA told me to use it, so I use it. Now, do you have the extra heat vents in the wheel wells? I think those really do help as you can feel the heat gushing out when the fans come on. That's about all I can offer up on the subject.
