Thread: Derale 12" Radiator Fans

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Remember .......if a company sells a fan without saying it is a true pusher...it's a puller. And it will not work well as a pusher if you have to turn the blades around and rewire it to run as a pusher.
Again.......Spal makes a true pusher or a true puller...they won't sell a puller and tell you to turn the blades.
Spal is also factory on the new Ferraris..........there web site is..........Spal-USA.com
When measuring for space for a fan, always give yourself at least 4 inches extra from where it attaches to the radiator to the front of the motor. Always look for the HP after the fan number. Spal mkes lots of fans but the HP versions are meant for the hot rod motors.
Using fans from some stock applications may work ok, but the downside is those fans are meant to cool the HP of that motor. You need to have a fan that will cool HP.
I can tell you that a twin 11in fan setup from Spal will need 24 inches of finned area of the radiator to fit it.
And finally...........I don't work for Spal.........I work for Evans cooling............but we do talk to people all day and tell them the same thing about Spal fans.

i have found over the years that the #1 reason for heat problems is rad thickness. i went to a z-core back in 90 with an original 47 rad. you could see through it and only 2 3/8 in thick. was able to move much more air at idle. sold the walker to the first person i could and have not owned one since. since then i have switched to aluminum rads and the flexlite cyclone fan . my shop truck will have a ford factory electric fan from a 94 tbird. thing is like a helicopter but draws a lot of amps.

Thanks guys. I spoke with SPAL and the only one that fits my needs will be the 11's. I see what you mean by the amount of surface area needed for the 11's, so the SPAL's wont work for me unless I go with the single 16 which I may do.

I've even concidered converting back to a clutch/fan combo. The Chevelle/El Camino rad was simple to make a shroud for. I bought the radiator from Champion and I'm very happy with the radiator itself. I'll be able to mount a flat piece of aluminum with a bend at top and bottom. I've got a 16" fan mounted directly to the radiator at the moment but it make me uneasy mounting it this way if my son is going to be driving this thing all the time. So yes I'm mounting it to a shroud soon.

Shine, I know what you mean by the radiators. My son's car has a heck of a cooling issue. Its on the verge of detonation as it is which makes it even harder with cooling. I went with the aluminum radiator and it instantly dropped in temperature but I'm sure it was in how they designed it....as they staggered the rows slightly. Prior to the change to the aluminum it had a 4 row factory style radiator and I just couldnt cool it no matter what I did. Cooling it know is no longer an issue even on the hottest of days. I may back the timing off a bit more.

Thanks again guys. Your help inspires all sorts of ideas and anyone digging for info may see this thread later.

David