diesel_lv
Well-Known Member
'67 Coronet w 496, about 610hp in 110-120° typical daily summer temps. Waiting for Derale 6 blade steel reverse rotation fan. Will be direct mount, no fan clutch, and using the factory shroud. I have dual electric fans that do great at low speed n idle. But at highway, gets up to 220 on flat n level. Tried 2 radiators, 2 row 1" aluminum and 2 row 1-1/4" aluminum. 180 and 160° robert shaw thermostats, flowkooler water pump, sheet metal shrouding above, to the sides and below the grill to core support funneling all air through the face of theradiator. My idea is that the electric fan shroud is a bottleneck. Hoping the mechanical fan n stock shroud will work. My question, just in case, does anyone know of a 7 blade just like the factory reverse rotation fan. Im getting a new water pump pulley for my serpentine pulley setup that will replicate stock pulley thickness so I can run mechanical fan. Maybe even a fan clutch. I've looked at a modern plastic reverse rotation fan but would need to research fan clutch fitment. Thanks in advance.