Hot Rod Forum banner

Electric Fan Crearance

1K views 9 replies 7 participants last post by  1971BB427 
#1 ·
How close to the radiator fins should the blades or shourd be mounted ? It's a pusher fan going into a 36 Ford with a small block. Theres a very small shroud around the blades.

Thanks, guys !


454 RATTLER

My Spell Check didn't catch the misspelling of the word Clearance in the title !! Sorry about that !
 
#2 ·
How close to the radiator fins should the blades or shourd be mounted ? It's a pusher fan going into a 36 Ford with a small block. Theres a very small shroud around the blades.
Thanks, guys !
454 RATTLER
My Spell Check didn't catch the misspelling of the word Clearance in the title !! Sorry about that !
Just tell 'em you were munching on a brownie when you said it....:thumbup:
Never did what you are proposing. Never needed to because I will only use crank-driven fans. Snow White makes a short water pump for the SBF and it should be possible to mount the radiator a little further ahead with some tinkering.
If I were going to though, I think I'd mount a full shroud on the front of the radiator with two holes in the shroud for two fans. If I couldn't find a commercially-available shroud, I'd fabricate one from sheet aluminum and pop rivet it together.
 
#3 ·
Pusher fans lack effectiveness, the area they cover against the total radiator core area is pretty small. The idea with the shroud is to promote some siphon flow around the outside of the shroud by the pressure reduction of the air exiting the fan. This isn't as effective as it needs to be. The most effective set up is a puller fan on the engine side sitting at the exit of a shroud that seals the perimeter of the radiator. This develops a low pressure area behind the core so air flow will occur across the entire surface area. This level of efficiency is not considered visually attractive so is seldom seen on street rods. Cooling of these machines just continues to be a problem.

Bogie
 
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Top