Originally Posted by
PeeBee
I asked the question of ADRAD when ordering mine, 84mm or 56mm , their cores are in 28mm modules and they categorically said 56. The thicker radiators are for trucks with great flow thru ventilation or static installations with no back pressure, as is not found under a bonnet. As I mentioned in a previous post, they actually flow test with water and air with their designs. So deeper isnt better in most cases.
Andy, you might recall I destroyed a fanblade doing the river crossing at Burgoynes? My fan blades would have been 30mm off the core I reckon and that was too close, and it actually scored the fins as 6 blades broke off. I ended up running a Toyota FJ60 fan blade which had a better offset, increasing clearance to 45mm. I didnt have problems from then on, but what was interesting is the fan blades actually flatten out and extend under load. I know this because the ears of the new fan blades or tips had a 15mm x 3mm chewed out piece and the only thing that could account for it were the tek screws I used to secure the shroud extension. Just a heads up if you start to look at a different plastic blade, watch out for the overall diameter