Radiator

[voucht]

Originally Posted by baz-r

the way I see it you get a restriction of airflow with it infront or behind the rad

Hi Baz,
David wrote a long post about that on this thread, so did I Most of the answer I would have published here is over there.
http://www.haynes.co.uk/forums/showt...t=6165&page=10

Originally Posted by baz-r

some fans have directional blade patterns and push more air in one direction than the other even if the motor is bidirectional

And a complement in answer to what you say : Blower fans with special designed bladed which make them more efficient than the puller equivalent, have just been designed to increase the efficiency of a blower fan because some applications do not have enough room between the engine and the radiator to install a puller. So it is totally normal that these kind of design exists, but it doesn't make a blower set-up more efficient or generally preferable to a puller set-up, for the reason exposed here and the other thread.