Clutch Fan

rrvolare said
Can you elaborate on DERALE setup ... I am installing a big block in my 69 dart with a 22 almost 23 inch across radiator and 18 inch tall.. My issue also is possible interference on water pump pulley to fan contact .. SO i opted to go with dual fan setup due to more room in center of radiator with dual fan setup ... I called b-cool and they recommended p/n 75007 dual fan spal setup .. Does ANYBODY know how what dual fan setup works with a large tube 2 row radiator works ?

I have been running a 17" mech. fan on my 505" 68 fastback, w/ an elec. 15" pusher/ mounted as far ahead of the rad. as possible. The pusher is set to come on at 200 , and only comes on , on the hottest days, mostly screwing around in town. I currently am building a 12" elec. dual fan set up on a shroud, and keeping the 15" pusher as the same it is now. I jumped the two elec fans that I have tied together, and don`t think they will do the trick, the pusher may be the only thing that will make them work. Will post results when I get the shroud finished and installed in the car. I watched the fan comparison on engine masters, and don't think a full mech. fan will hurt a big block as much as it did the little 350 chev engine. But, u know how us hotrodders are. I run an 1 1/4" / 2 tube crossflow 28x19" alum. rad. , and don't have room for even the short clutch fan--------
I may have the elec. set up for sale , ( which would probly keep a lesser engine cool) , -----------more to come later----------