Thread: Another radiator question

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raj4851, from your options listed, and in particular your #2 and #3 it sounds like you are running a standard belt driven mechanical fan pulling, and then you've installed a 14" SPAL fan out front as a pusher. If that's the case IMO you've either got a radiator that's not flowing coolant properly, i.e. it's got some internal plugging; you don't have a good shroud for the mechanical fan; or you've got a water pump problem. A radiator of adequate surface area and tube count will cool just fine with the properly shrouded mechanical fan running a clutch to let it freewheel when it's not needed and a thermostat to control the flow. Pusher fans are a last resort, only used when there's simply no other answer, and they are NEVER needed to supplement air flow - they block flow running down the highway and are a negative value, again IMO.

If you're forced to look at an electric fan it's critical that you look at the fan SCFM with restriction. Free air flow means nothing. IMO SPAL makes just about the best electric fans out there, and one of their fans sized to fit coupled with their programmable controller is a good choice, but only if you can't run a belt driven mechanical fan because of space.

Give us a description of exactly what you're running now, including pictures of the shroud & fan on the back side if you can, or a detailed description of how the fan fits into the shroud, clearances, etc, etc, and we can see what makes sense. What degree thermostat are you running?