changingman 7 1 Cars Posted August 3, 2017 Hi , I've got a bit of an issue in as much as I am not sure which direction my fans should be turning, clockwise or anti clockwise. I am wiring In a switch so I can turn them on and off manually from inside the car as the sensor that told the fan when to come on and off didn't always work. It's a track car so I want full control over it. I've wired in a switch but all the existing wires to the fans are made up of half a dozen bits of different coloured wire joined together and I have got new wires run but I don't know which way the fans should turn. The fans run in either direction if I reverse the polarity of the wires. Thanks Liam Share this post Link to post Share on other sites
Simes 248 2 Cars Posted August 3, 2017 Depends if they suck or blow. By your picture I'm assuming they blow, check with the manufacturer. Btw The sensors are £9, I bought one last month. I hope that there is a relay in there somewhere....... Share this post Link to post Share on other sites
changingman 7 1 Cars Posted August 3, 2017 Depends if they suck or blow. By your picture I'm assuming they blow, check with the manufacturer. Btw The sensors are £9, I bought one last month. I hope that there is a relay in there somewhere....... Cheers, I think cold air is drawn from the outside and blown onto the rad so that ties in with what you said. And no relay, just 30 amp wiring, 30 amp switch on the dash and a 30 amp inline fuse. I openly admit I know very little about auto electrics !!! Cheers Liam Share this post Link to post Share on other sites
Tom Fenton 1,548 Posted August 3, 2017 I don't understand people's obsession with manual fan switches. In my opinion they are awful. Get distracted by whatever and the car should be able to look after itself. Instead with the wonderful switch it's boil up time. Fit a auto switch in the rad and make it work then forget about it. 3 Share this post Link to post Share on other sites
changingman 7 1 Cars Posted August 3, 2017 I don't understand people's obsession with manual fan switches. In my opinion they are awful. Get distracted by whatever and the car should be able to look after itself. Instead with the wonderful switch it's boil up time. Fit a auto switch in the rad and make it work then forget about it. It's not an obsession on my part Tom , if rather the car did what it was supposed to but I have no trust in it so a manual switch it has to be!!!!!!! I've shagged one 205 and one EVO on track to date and I don't want to add this to the list. Lol!!! Share this post Link to post Share on other sites
petert 601 Posted August 3, 2017 Normally you can flip the fan blade over, depending on whether you want it to suck or push. The direction remains the same. 1 Share this post Link to post Share on other sites
changingman 7 1 Cars Posted August 3, 2017 Normally you can flip the fan blade over, depending on whether you want it to suck or push. The direction remains the same. That's interesting to know,thanks. Share this post Link to post Share on other sites
Biggles 65 Posted August 3, 2017 Why not have both ? My fans are on a temperature switch but have a manual override should I feel the need (which I regularly do). 1 Share this post Link to post Share on other sites
petert 601 Posted August 3, 2017 Retaining nut is usually left hand. 1 Share this post Link to post Share on other sites
changingman 7 1 Cars Posted August 4, 2017 Why not have both ? My fans are on a temperature switch but have a manual override should I feel the need (which I regularly do). I had thought of that but as it's only ever going to be used on track I decided against it!! Share this post Link to post Share on other sites
Simes 248 2 Cars Posted August 4, 2017 I don't understand people's obsession with manual fan switches. In my opinion they are awful. Get distracted by whatever and the car should be able to look after itself. Instead with the wonderful switch it's boil up time. Fit a auto switch in the rad and make it work then forget about it.Me too, the original system is ample. Just make sure you have the correct switch and thermostat. 30amp wire is huge. A simple relay set up will be far easier and safer for you. Share this post Link to post Share on other sites
changingman 7 1 Cars Posted August 4, 2017 Me too, the original system is ample. Just make sure you have the correct switch and thermostat. 30amp wire is huge. A simple relay set up will be far easier and safer for you. Me too, the original system is ample. Just make sure you have the correct switch and thermostat. 30amp wire is huge. A simple relay set up will be far easier and safer for you. Yeah I know it is , and using ohms law the ampage will be just under 14 amps but as it's gonna be spent most of its life on I thought I'd better be safer than sorry. It's wired in now all bar connecting the spades onto the fans which takes seconds once I found out which way the fans should run!! Cheers for the input. Share this post Link to post Share on other sites
pug_ham 245 3 Cars Posted August 4, 2017 It's wired in now all bar connecting the spades onto the fans which takes seconds once I found out which way the fans should run!! Run the fans & see if you can feel air being pushed through the rad with your hand on the other side, if you can that's the way they need to be wired, iirc this should be with the fan spinning clockwise as you look at them, assuming your fans are mounted in the same orientation to the original ones. g 1 Share this post Link to post Share on other sites
changingman 7 1 Cars Posted August 5, 2017 Run the fans & see if you can feel air being pushed through the rad with your hand on the other side, if you can that's the way they need to be wired, iirc this should be with the fan spinning clockwise as you look at them, assuming your fans are mounted in the same orientation to the original ones. g They are in front of the rad behind the grille. They are sucking air and blowing it onto the rad so it all good I believe!!! Cheers. Liam Share this post Link to post Share on other sites
Henry Yorke 269 3 Cars Posted August 5, 2017 Dangle a piece of toilet roll in front of the grille to confirm what way it is blowing. It is amazing how many can get wired up wrong. Also shielding around the rad would force more air through the rad and help your cooling issues Share this post Link to post Share on other sites
welshpug 1,666 Posted August 6, 2017 most decent fans will have a direction of rotation arrow, and different blades for pull and push. Share this post Link to post Share on other sites
Simes 248 2 Cars Posted August 6, 2017 Also shielding around the rad would force more air through the rad and help your cooling issues And / or put them on the other side and suck the heat out. Share this post Link to post Share on other sites
changingman 7 1 Cars Posted August 8, 2017 Cheers guys, I have lost heart now , all I want to do is cycle cycle cycle, never thought I'd hear myself say that but I've got a track event on aug 23rd at Bedford auto drome and then I'm selling it to concentrate on my cycling. Share this post Link to post Share on other sites
changingman 7 1 Cars Posted August 9, 2017 What bike? What bike have I got do you mean?? Scott Addict 15 di2 Road Bike , Salsa Mamasita 29er, The Paingiver , Fixed Wheel. Saracen MTB Share this post Link to post Share on other sites
petert 601 Posted August 9, 2017 Well that's a nice group of bikes. Not a great fan of 29er's however. What's the track event? Share this post Link to post Share on other sites
changingman 7 1 Cars Posted August 9, 2017 (edited) Well that's a nice group of bikes. Not a great fan of 29er's however. What's the track event?29ers kick ass , much faster than a standard MTB. The track event is aug 23rd @ Bedford Auto drome , open pit lane! Edited August 9, 2017 by changingman Share this post Link to post Share on other sites
