this really isnt an electrical question which is why i posted here. thought id get better answers. i know how to wire up relays and size wires/fuses for the ckt.
my question is that i bought 2 16" fans. i made a "shroud", if you will, for them and thought of something today that now makes me wonder how to go about wiring them up. i did some research and it seems that STOCK TRUCK/CAR FANS have a low and high speed. the fans i bought are single speed. on the pcm, fan 1 out is for low speed when temp reaches 223* and fan 2 out is high speed when temp is at 230*
anyway, i have a few options id like to run by you guys. need help picking the best one..
1) i orginally planned on having one kick on from fan1 then the second from fan2 since they are single speed fans. but after thinking about it, there will now be a huge hole in the shroud (due to the second fan not being on). if i have it hooked up this way, will this tend to suck air from where the non running fan is rather than through the radiator? if so then this wouldnt be ideal when idling.
2) have both fans kick on from fan1 out and call it a day. with both on they should cool it down extremly fast. this means that they will both be kicking on and off constantly. will this will lessen the life of them quicker?
3) hook both fan1 and fan2 out in paralell using two relays. this would essentially be the same scenario as #2 since the temp will never be above 230* The reason for this is in case a fuse blows, relay dies, short ckt, etc. fan2 out would basically be a backup of fan1 out since it is 2 diff circuits. i would keep the circuits isolated also so a short on one wouldnt mess with the other.
i prefer option #1 as it would leave me a backup fan in case the first went down. but im thinking option #3 is what everyone is going to recomend.... sooooo, 1,2 or3???
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