I have two Skyline fans and they worked well on the back of the radiator with the polarity reversed but worked even better when I flipped the blades upside down!! (easy to do too).
also Andrew I think Davies Craig fans can have their polarity reversed. At least I am sure I read that on the packaging of one of their fans! zac > O.K., looks all right now. I went out and reversed the wiring, and it is > now sucking, and a lot quieter as well! I also know where the problem lies. > The original wiring for the original relay (that didn't work) was wired > indicating red as the negative, and black as the positive. When I have hard > wired the fan to a switch on the dash for a temporary measure, I have taken > the red to be positive and black to be neg (how silly of me, hey!). All > o.k. and sucking through the radiator into the engine bay now. I always > thought that it was not right, but was hesitant to wire the other way around > with fear of doing damage to the fan. Thanks for the help guys. > > Greg > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED]]On Behalf Of GREENBURY, > Andrew Robert > Sent: Monday, 26 November 2001 1:26 AM > To: [EMAIL PROTECTED] > Subject: RE: thermo fan. > > > hey guys, > > you have to be careful with reversing the airflow by reversing the wire > polarity, because a lot of these motors are designed to rotate the one > way. you can burn them out by making them rotate in the opposite > direction. thats why davies craig ones are reversed by reversing the fan > not polarity. > > greg - if you stick your hand in front of my grill you would swear the > fan is blowing not sucking too. but when you compare the flow on the > engine side vs the grill side you realise that it is actually sucking as > it should. as eric suggested, check out whether the donor car for the > thermofan had it mounted engine side or grill side to determine the > operation it was designed for. > > good luck for the new 1600 project :) > andrew > > On Sun, 25 Nov 2001, Jon Ovington wrote: > > > Some fans for example aftermarket Davies Craig can easily bun unbolted and > > turned around to suit 'blowing' or 'sucking' for in front or behind the > > radiator. > > > > However, Greg seems to have said, is thermo blows hot air out! If this is > > so, the fan is behind the radiator but is pushing air out, this is not > good! > > > > You will need to reverse the fan, or the polarity of the wires to the fan > > motor to get it to spin the other way and 'suck' the air in. > > > > cheers, > > Jon > > > > ------------------------------------------------------- > > DatNet - Online Datsun Resource > > Website: http://www.datnet.org > > Jon Ovington - [EMAIL PROTECTED] > > Matt Spiteri - [EMAIL PROTECTED] > > [EMAIL PROTECTED] [EMAIL PROTECTED] > > > > > > -----Original Message----- > > From: [EMAIL PROTECTED] > > [mailto:[EMAIL PROTECTED]]On Behalf Of Eric > > Sent: Sunday, 25 November 2001 10:06 PM > > To: [EMAIL PROTECTED] > > Subject: Re: thermo fan. > > > > > > Greg, > > > > I was told that some thermos are designed for the front of the radiator, > > that is to push the air through and others are designed to pull it through > > and therefore to be installed on the back. > > > > I don't know whether you can swap them around. It has something to do with > > the design of the fan blade. > > > > Was your's previously installed on the back or the front ? > > > > Cheers > > > > Eric > > > > > > > > > >
