Engine bay cooling

[Rob. Smith]

Originally Posted by cameron02

Hi Smithy,

As far as I am aware (which isnt much) the closer the fan the better. The fan will lose pulling power very rapidly as you move it further away because it will start to pull air from the engine bay instead of through the radiator as this is less resistance, this is what shrouds are designed to prevent. You could maybe look at a fan with more fins or fins with a bigger curve so they pull more air. Personally I prefer thermo fans but they are no good if you want the retro look.

The fan has multi blades and spins pretty fast...you can feel a small draught through the fan but it seems to be lost a few inches away. The shroud is sealing the radiator to the fan. If you move the fan and shroud back the air flow should become smoother and more effective. This is proven with oil coolers and air condition condensers. There must be a gap between them to allow the air flow to become a "flow" and not a cavitation. I proved this with a mustang I built. It had an oil cooler, air con condenser, transmission cooler and then the radiator. All sandwiched together...Stupid. I seperated each one by1 inch and you could feel an actual draft through the whole lot. The only shroud was around the fan after the radiator. This cooled the big worked cleveland like it had no air or auto. The dyno man suggested a commodore fan and shroud. i feel a little modification will work.
Thanks for all the input every one.
Smithy