Help Me Cool Down

Does a HD flex fan not move a lot of air at idle? It looks to have a lot of pitch. My issue isn’t so much at speed as when at idle. The shroud is tight against the fan blades, about 1/2” clearance. With the turbo and a 3200 stall, I’m alsways running around 2500-5000 rpm, lower than NA engines.

I’m going to try some dual electric fans up front and see if it’ll help first. I absolutely need to tackle the pulley problem. I need to keep the smaller crank pulley I have because it isn’t concave like oem and i needed to mount a lock bolt to secure an ignition wheel to the crank. The new pulley has some meat to tap into. I could also try and see if a machinist can weld on a ignition wheel to an oem pulley - problem is that it needs to be fairly concentric for the hall sensor and balance.