ok, here we go. I am starting to see how is going to be posible. After some preliminary mesurments if you put a standard electrik fan with the size of the original, the motor more or less does not fit, <img src="/forums/images/graemlins/confused.gif" alt="" />
But I came with the idea of leaving the fan as it is free wheeling on its original axle, place the motor near the altenator ( mayme usung the same mounting) and driving it with a belt after ofcourse ripping of the engage mechanism.
pros: adecuate motor - possibility of regulating rpm's
cons: more complex having to modify motor to put a driving wheel, capasity of the alt. base to hold the weigh.

Question.
will it eat the free wheeling all the HP gained?

I leave the electrics for a later post.