FAN Mod
#1
FAN Mod
so i was thinking today about the whole fan mod ordeal. is it possible to just wire the fan motor straight to the battery with a switch mounted inside in between the connection? haven't heard of anyone doing it so figured i would give it a shot.
#3
Doing so would bypass the relays....a very poor idea. You would have to always remember to turn the fans on!
If you don't have the PFC, just get an FC thermoswitch and be done with it. Or if you want to get fancy, Dale Clark recommends the HKS fan controller.
If you don't have the PFC, just get an FC thermoswitch and be done with it. Or if you want to get fancy, Dale Clark recommends the HKS fan controller.
#6
I think you need to clearly define your goals, and THEN start looking into how to accomplish them.
What is your car doing, and what do you want it to do? How do the cooling fans factor into all of this?
-s-
What is your car doing, and what do you want it to do? How do the cooling fans factor into all of this?
-s-
#7
Originally Posted by bryant
you still have a relay?? what relays do you mean?
Originally Posted by RevLimitLaunch
so i was thinking today about the whole fan mod ordeal. is it possible to just wire the fan motor straight to the battery with a switch mounted inside in between the connection? haven't heard of anyone doing it so figured i would give it a shot.
http://www.fd3s.net/fan_mod.html
http://rx7.voodoobox.net/howto/fanswitch/fanswitch.html
Last edited by Sgtblue; 12-07-06 at 08:43 AM.
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#9
Originally Posted by SINxSELEKTAH
i kinda want to undo the fan mod, but wires give me a head-ache
How can one wire and one switch give you a headache ? I can only imagine what a pain in the *** this car must be for you. ! ! ! LOL
#11
fan
i planned on taking the power wire off the fan motor and hooking it up straight to the battery with a switch in between. no headaches, would take about 30 seconds, plus time mounting the switch. remembering to turn it on is no problem at all. other than that would there be any problems, im guessing no, but i like to make sure. thanks
#12
Originally Posted by RevLimitLaunch
i planned on taking the power wire off the fan motor and hooking it up straight to the battery with a switch in between. no headaches, would take about 30 seconds, plus time mounting the switch. remembering to turn it on is no problem at all. other than that would there be any problems, im guessing no, but i like to make sure. thanks
#15
fan
nothing wrong, just thought it'd be easier to wire it up since it would take seconds to do, and no i do know that an inline fuse is to be used. im not an amateur at it haha. i know i won't forget, it's not the first car i've had one in, there have been several and i always check my gauges every minute or so, never know when somethings going wrong with your car randomly. i wasn't asking to get b*tch*d out on all of this, just simply if it could be done, wasn't sure becuase i didn't find any threads where someone has done it.
#16
Wait a minute here. You're already talking about your PLAN OF ACTION, before defining your GOAL. There is a HUGE difference, and I think you're missing the point that everyone's trying to make. Let me say this as clearly as possible:
YOUR PLAN OF ACTION IS UNSAFE,
There are a few good reasons that nobody just runs a wire with a switch to the fans. The fans draw 15-30 amps of current when they're operating normally. You would need 8 gauge wire to be safe at 30A, and you'd need to find a switch that can handle 30A. That's not the sort of thing you'll be able to buy at RadioShack. If the fan blades ever get stuck, it will draw even more current, so you'd better have a 30-40A fuse in there as well, to prevent the wires from catching fire.
But all this 'electrical safety' talk can be a real drag. I don't like saying "be careful or you'll burn yourself, son!" It makes me feel feel like a grumpy old fart.
Let's step back and think about what your GOAL again. You've probably already thought of a GOAL, in your head, but you didn't say it on these forums. I'm going to assume your GOAL is to keep your car at a certain engine temperature. Let's say 190F-200F, that's nice and safe. Let's add another GOAL; we want to add as few wires as possible, and we want to modify as few existing wires as possible.
So far, your PLAN is to add a switch, and watch your gauges, and be sure to flip that switch every time the temperature gets too hot. If you're really careful, you'll always flip that switch at the exact same temperature, let's say 190F. The down side is that if you forget to flip this switch, the engine will get too hot. Or if your gauge is malfunctioning, you won't see the temp and you won't know when to flip the switch. So far, that's two possible ways for things to go wrong. If the switch doesn't work, that's a third possible thing to go wrong.
Here's another PLAN you might try, it's been used by racers for a long time. You need to buy a thermoswitch (also called thermal switch, or non-linear thermistor). It's just like a temperature sender for a gauge, but instead of sending a temperature signal, it just switches ON or OFF when the temperature reaches a certain point. The OEM fan control system has one, but it's switching at a high temperature (226F). The thermoswitch from the 1986-1991 RX-7 switches at a lower temp (203F), and you don't need to change any wires on your car.
Check it out here: https://www.rx7club.com/3rd-gen-archives-73/fc-thermoswitch-fd-447606/
Hope this helps,
-s-
YOUR PLAN OF ACTION IS UNSAFE,
There are a few good reasons that nobody just runs a wire with a switch to the fans. The fans draw 15-30 amps of current when they're operating normally. You would need 8 gauge wire to be safe at 30A, and you'd need to find a switch that can handle 30A. That's not the sort of thing you'll be able to buy at RadioShack. If the fan blades ever get stuck, it will draw even more current, so you'd better have a 30-40A fuse in there as well, to prevent the wires from catching fire.
But all this 'electrical safety' talk can be a real drag. I don't like saying "be careful or you'll burn yourself, son!" It makes me feel feel like a grumpy old fart.
Let's step back and think about what your GOAL again. You've probably already thought of a GOAL, in your head, but you didn't say it on these forums. I'm going to assume your GOAL is to keep your car at a certain engine temperature. Let's say 190F-200F, that's nice and safe. Let's add another GOAL; we want to add as few wires as possible, and we want to modify as few existing wires as possible.
So far, your PLAN is to add a switch, and watch your gauges, and be sure to flip that switch every time the temperature gets too hot. If you're really careful, you'll always flip that switch at the exact same temperature, let's say 190F. The down side is that if you forget to flip this switch, the engine will get too hot. Or if your gauge is malfunctioning, you won't see the temp and you won't know when to flip the switch. So far, that's two possible ways for things to go wrong. If the switch doesn't work, that's a third possible thing to go wrong.
Here's another PLAN you might try, it's been used by racers for a long time. You need to buy a thermoswitch (also called thermal switch, or non-linear thermistor). It's just like a temperature sender for a gauge, but instead of sending a temperature signal, it just switches ON or OFF when the temperature reaches a certain point. The OEM fan control system has one, but it's switching at a high temperature (226F). The thermoswitch from the 1986-1991 RX-7 switches at a lower temp (203F), and you don't need to change any wires on your car.
Check it out here: https://www.rx7club.com/3rd-gen-archives-73/fc-thermoswitch-fd-447606/
Hope this helps,
-s-
Last edited by scotty305; 12-08-06 at 10:41 AM.
#17
Originally Posted by RevLimitLaunch
nothing wrong
Originally Posted by RevLimitLaunch
...just thought it'd be easier to wire it up since it would take seconds to do
Originally Posted by RevLimitLaunch
....and no i do know that an inline fuse is to be used. im not an amateur at it haha. i know i won't forget, it's not the first car i've had one in, there have been several and i always check my gauges every minute or so, never know when somethings going wrong with your car randomly.
Originally Posted by RevLimitLaunch
.... i wasn't asking to get b*tch*d out on all of this, just simply if it could be done, wasn't sure becuase i didn't find any threads where someone has done it.
#18
Originally Posted by scotty305
.........The down side is that if you forget to flip this switch, the engine will get too hot. Or if your gauge is malfunctioning, you won't see the temp and you won't know when to flip the switch. So far, that's two possible ways for things to go wrong. If the switch doesn't work, that's a third possible thing to go wrong.
Revlimitlaunch: There are lots of smart people that have posted on this thread. So far, you have not shown that you belong in this group
#19
I think most people on here are saying it can be done. but why do you want to do it? No offense really, I'm a noob so I've just wondering about the advantages.. Do you considering wiring a switch in to the thermostat so that you can turn it on manually, and have the thermostat kick in when it's off and that the right temp?
People have to calm down, if he get's the right wires relays/fuses, and always turns it on, what's the prob? there are high power wires inside cars, what are people getiing so worried about?
People have to calm down, if he get's the right wires relays/fuses, and always turns it on, what's the prob? there are high power wires inside cars, what are people getiing so worried about?
#20
fan
ok idea gone, i already have a 180 degree thermoswitch lol. i just never heard anyone on here do a direct switch fan mod, so thought i'd ask if it could be done without a big hassle of eliminating the relays and what not. so thank you for who answered my question, i didn't need to be b*tch*d out on why i should or shouldn't do it. i just wanted to know if it could be done. i plan on doing the actual fan mod come spring time when autocrossing starts up around here again. as of now its very very cold and there's snow on the ground :smiley_12.
#21
^^ Thermoswitch or ThermoSTAT? Where did you install your 180 degree 'thermoswitch'? How many wires are connected to it?
This is a thermoswitch:
This is a thermostat:
PS, don't assume that people 'bitched you out' or that anyone on here doesn't like you. This is just the internet, don't take it personal just because we didn't use smilies when we told you that your plan was not the best way to do things.
Say for instance you installed a 35A fuse, a 40A switch, using 8 gauge wire, and everything was safe and worked fine because you know what you're doing. I don't want some rookie to read your thread and then try to do the same thing with a RadioShack 10A switch, some 16 gauge speaker wire, and no fuse.
"I explain things because I care,"
-s-
This is a thermoswitch:
This is a thermostat:
PS, don't assume that people 'bitched you out' or that anyone on here doesn't like you. This is just the internet, don't take it personal just because we didn't use smilies when we told you that your plan was not the best way to do things.
Say for instance you installed a 35A fuse, a 40A switch, using 8 gauge wire, and everything was safe and worked fine because you know what you're doing. I don't want some rookie to read your thread and then try to do the same thing with a RadioShack 10A switch, some 16 gauge speaker wire, and no fuse.
"I explain things because I care,"
-s-
Last edited by scotty305; 12-08-06 at 12:15 PM.
#23
Where did you get this "180-deg thermoswitch".....even the FC switch doesn't turn on until 203F? Turning on the fans at only 180-deg is pointless and doesn't let the car get warm enough for maximum performance.
We now have a 2-page thread in which you still haven't stated why you are messing around so much with the cooling system. If you don't have the PFC, just install the FC thermoswitch and be done with it. Or even do the "normal" fan-mod if you want.
We now have a 2-page thread in which you still haven't stated why you are messing around so much with the cooling system. If you don't have the PFC, just install the FC thermoswitch and be done with it. Or even do the "normal" fan-mod if you want.
#25
You know what is everybody complaining about? I just did the fan mod switch from here http://rx7.voodoobox.net/howto/fanswitch/fanswitch.html. Just follow the instructions exactly. And my fans still turn on if i forget to flip the switch. So i don't know what the big ordeal is?