Thread: cooling my 36 chevrolet..

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Here's a link to a picture of a proper setup of a tall, narrow radiator, with a properly made shroud and an electric fan. The shroud covers the entire back of the radiator. If possible, use a 16" diameter fan, from a reputable company like SPAL. http://www.prchotrod.com/media-cente...m_radiator.jpg

There is a good reason to use an electric fan instead of mechanical - you get more air flow when idling in traffic and the fans shuts off when not needed, so there's no loss of power at cruising speeds. All modern cars use them, AFAIK.

It was brought up recently that some companies advertise large flow rates for their fans, but that's probably at zero pressure drop. Any good company will publish the air flow rate from zero pressure drop, on up to the maximum pressure drop, where air flow is reduced to zero. This link should take you to spec for the fan that's on my car. It does the job, but I'd like something quieter. Notice that the pressure drop in in millimeters of water, not inches and flow rate is also in metric units. The conversions are at the bottom of the chart. For example, this fan flows 1156 cfm at .4" pressure drop and a maximum of 1600 cfm.

https://webstore.spalusa.com/content...01517_SPEC.pdf

This 14" fan will flow a similar amount of air.

https://webstore.spalusa.com/content..._2056_SPEC.pdf

I'll probably be switching from my 16" SPAL straight blade to this higher performance model:

https://webstore.spalusa.com/en-us/p...-16-c-12v.aspx

Here's a Maradyne, with a proper graph of the flow.

http://www.maradynehp.com/m162k.html