ECT at 205 idling with fans on after highway drive
#51
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Re: ECT at 205 idling with fans on after highway drive
I just wonder when comparing pusher vs puller, how much efficiency is lost? For example would a 1250cfm puller still work better than a 1500cfm pusher?
#52
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Re: ECT at 205 idling with fans on after highway drive
Its not really a question of "efficiency". You still have to remember that the air speed of the air coming into the radiator over 40 mph is still faster than any 1500cfm fan can produce "pushing", especially ewhen the fan itself has itself become an obstruction for air flow directed into the radiator itself. You can shift a 12" slightly lower to be below the wastegate, but it's still better to make simple cardboard measurements based upon the fan schematics.
Last edited by TheShodan; 03-17-2018 at 08:17 PM.
#53
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Re: ECT at 205 idling with fans on after highway drive
Its not really a question of "efficiency". Toy still have to Remer that the air speed of the air cunning inot the radiator over 40 ph is still faster than any 1500cfm fan can produce "pushing", especially ewhen the fan itself has itself become an obstruction for air flow directed into the radiator itself. You can shift a 12" slightly lower to be below the wastegate, but it's still better to make simple cardboard measurements based upon the fan schematics.
Pretty bummed, I just don't think it's going to fit. The air flow of the smaller fans don't even come close to the 12", and I would still need to check to be sure if a 12" pusher would even fit.
#54
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Thread Starter
Re: ECT at 205 idling with fans on after highway drive
Causing a short circuit burning up wiring and or causing a fire. Also if you mean hooking the fan up directly to battery without an activator thats not smart as the fan should only go on while needed this way there is less stress on the fan and your keeping your engine at optimal temp.
you can run a relay + a fuse using the temp sensor here you go this should be correct
you can run a relay + a fuse using the temp sensor here you go this should be correct
Also, should my 30A fuse go on the + wire to the fan?
Thanks,
#55
Honda-Tech Member
Re: ECT at 205 idling with fans on after highway drive
one of the wires already goes to ground, I would test for ground and leave the grounded wire alone and wire up the other one. But realistically no it does not matter which wire goes to ground if you want to rewire it altogether.
your fuse should be at the source of + so that both the relay and fan are fused, as close to the battery as possible
#56
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Re: ECT at 205 idling with fans on after highway drive
one of the wires already goes to ground, I would test for ground and leave the grounded wire alone and wire up the other one. But realistically no it does not matter which wire goes to ground if you want to rewire it altogether.
your fuse should be at the source of + so that both the relay and fan are fused, as close to the battery as possible
your fuse should be at the source of + so that both the relay and fan are fused, as close to the battery as possible
Ahh okay, thanks a bunch! This has been helpful stuff, for a wiring noob.
Dammit, I almost want to just get the puller fan and cram it in there, the more I read about all the benefits of it. Wastegate will just rub on the plastic a lil
I'd literally have to move my wastegate, get the manifold re-welded, and a new dump tube fabricated to remedy this. I have no fab tools/abilities and don't even know of a place that could do this, so I'm kinda screwed there.
#57
Honda-Tech Member
Re: ECT at 205 idling with fans on after highway drive
Ahh okay, thanks a bunch! This has been helpful stuff, for a wiring noob.
Dammit, I almost want to just get the puller fan and cram it in there, the more I read about all the benefits of it. Wastegate will just rub on the plastic a lil
I'd literally have to move my wastegate, get the manifold re-welded, and a new dump tube fabricated to remedy this. I have no fab tools/abilities and don't even know of a place that could do this, so I'm kinda screwed there.
Dammit, I almost want to just get the puller fan and cram it in there, the more I read about all the benefits of it. Wastegate will just rub on the plastic a lil
I'd literally have to move my wastegate, get the manifold re-welded, and a new dump tube fabricated to remedy this. I have no fab tools/abilities and don't even know of a place that could do this, so I'm kinda screwed there.
up to you I really haven't had any issues with my pusher, lots of people run it this way
#58
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Thread Starter
Re: ECT at 205 idling with fans on after highway drive
Question, hopefully the last one, before I finish up this wiring because I want to get it right.
You show a battery hot powering the fan, should this not be an ignition "on" source though instead? If I turn off the ignition and the engine is still hot, will the fan stay on until it cools down and drain my battery?
Thanks!
You show a battery hot powering the fan, should this not be an ignition "on" source though instead? If I turn off the ignition and the engine is still hot, will the fan stay on until it cools down and drain my battery?
Thanks!
#59
Honda-Tech Member
Re: ECT at 205 idling with fans on after highway drive
Question, hopefully the last one, before I finish up this wiring because I want to get it right.
You show a battery hot powering the fan, should this not be an ignition "on" source though instead? If I turn off the ignition and the engine is still hot, will the fan stay on until it cools down and drain my battery?
Thanks!
You show a battery hot powering the fan, should this not be an ignition "on" source though instead? If I turn off the ignition and the engine is still hot, will the fan stay on until it cools down and drain my battery?
Thanks!
actually stock wiring keeps the fan on after key is turned off so either way is fine I suppose, it does not drain your battery since the fan only stays on to about 185 (depending on your ECU settings) and then turns the fan off
#60
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Thread Starter
Re: ECT at 205 idling with fans on after highway drive
yes I would use s ignition source rather then going directly to the battery, that was simply done for a simplistic image.
actually stock wiring keeps the fan on after key is turned off so either way is fine I suppose, it does not drain your battery since the fan only stays on to about 185 (depending on your ECU settings) and then turns the fan off
actually stock wiring keeps the fan on after key is turned off so either way is fine I suppose, it does not drain your battery since the fan only stays on to about 185 (depending on your ECU settings) and then turns the fan off
Thanks! I’m excited to try my hand at some wiring like this as I have never done it before. Planning to solder and heat shrink all connections, and use a deutsch connector to the fan for ease of removal.
#61
Honda-Tech Member
Re: ECT at 205 idling with fans on after highway drive
those "13" amps are only active when the switch is triggered so anything below 195 degrees should not be pulling anything from the battery. I know with my OEM wiring the fan will stay on for like 30 seconds at most after a spirited drive and turning my car off. Technically your supposed to let it idle for a minute or so till your fans turn off with turbo anyway you dont want that super hot oil to coke up in the turbocharger
#62
Honda-Tech Member
Thread Starter
Re: ECT at 205 idling with fans on after highway drive
Alright I got the pusher fan, everything looks like it’ll fit I just need to find time to do the wiring.
I’d like to put an indicator LED inside so I know when the fan is on. There should be no issue if I run a wire branching off the + wire going to the fan for this LED, then run that to it’s own ground inside right? Or will this burn something up?
Also, I have plenty of 16ga wire on hand for this, and it appears to be the same gauge wire that came on the fan motor plug. Is this size wire going to be sufficient or do I need to get some 14 or 12 gauge?
I’d like to put an indicator LED inside so I know when the fan is on. There should be no issue if I run a wire branching off the + wire going to the fan for this LED, then run that to it’s own ground inside right? Or will this burn something up?
Also, I have plenty of 16ga wire on hand for this, and it appears to be the same gauge wire that came on the fan motor plug. Is this size wire going to be sufficient or do I need to get some 14 or 12 gauge?
#63
Honda-Tech Member
Re: ECT at 205 idling with fans on after highway drive
Alright I got the pusher fan, everything looks like it’ll fit I just need to find time to do the wiring.
I’d like to put an indicator LED inside so I know when the fan is on. There should be no issue if I run a wire branching off the + wire going to the fan for this LED, then run that to it’s own ground inside right? Or will this burn something up?
Also, I have plenty of 16ga wire on hand for this, and it appears to be the same gauge wire that came on the fan motor plug. Is this size wire going to be sufficient or do I need to get some 14 or 12 gauge?
I’d like to put an indicator LED inside so I know when the fan is on. There should be no issue if I run a wire branching off the + wire going to the fan for this LED, then run that to it’s own ground inside right? Or will this burn something up?
Also, I have plenty of 16ga wire on hand for this, and it appears to be the same gauge wire that came on the fan motor plug. Is this size wire going to be sufficient or do I need to get some 14 or 12 gauge?
If your set on this first off most leds run off about 5v so you need to get one with a built in resistor add your own resistor or get a LED that specifically says it runs off 12v. I would not even use 16 GA I would personally use the smallest wire I could find I.E. 20-26 GA. The LED pulls next to no amperage usually rated in MA
#64
Honda-Tech Member
Thread Starter
Re: ECT at 205 idling with fans on after highway drive
Alright thanks. Yeah I did pick up an LED that says it’s for 12V. I’m going to install it just because I am a newb at wiring mostly and this way I’ll be 100% sure anytime the fan is getting power. I’ll know if it’s not on due to bad wire connection, relay, thermo switch etc. I figure why not, it’s peace of mind.
Forgot to insert pics of the fan. I think this will work nicely even as a pusher. This 12” flows higher CFM than the two fans combined that I had previously, plus it covers the entire radiator and should provide good cooling being that it is away from the exhaust and turbo now. Hopefully I don’t have any more high ect issues.
Yeah I know it’s on the wrong side of the rad, just checking the fitment of it.
Forgot to insert pics of the fan. I think this will work nicely even as a pusher. This 12” flows higher CFM than the two fans combined that I had previously, plus it covers the entire radiator and should provide good cooling being that it is away from the exhaust and turbo now. Hopefully I don’t have any more high ect issues.
Yeah I know it’s on the wrong side of the rad, just checking the fitment of it.
#66
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Thread Starter
Re: ECT at 205 idling with fans on after highway drive
Alright guys, I am confused AF.
I've spent about two hours looking at every picture and diagram I can find of where the fan switch is supposed to be. My thermostat housing DOESN'T HAVE A FAN SWITCH! Like, not even a place to put a fan switch. How is that possible? Did they somehow fit a housing from a different engine on here that doesn't have the switch in that location?
This kind of explains maybe why the fans were wired to a toggle switch in the first place. I drew in blue where the fan switch plug should be.
I've spent about two hours looking at every picture and diagram I can find of where the fan switch is supposed to be. My thermostat housing DOESN'T HAVE A FAN SWITCH! Like, not even a place to put a fan switch. How is that possible? Did they somehow fit a housing from a different engine on here that doesn't have the switch in that location?
This kind of explains maybe why the fans were wired to a toggle switch in the first place. I drew in blue where the fan switch plug should be.
#67
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Re: ECT at 205 idling with fans on after highway drive
You don’t need a fan switch when you have hondata and can turn the fan on at your desired ect using the fan control input.
#68
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Re: ECT at 205 idling with fans on after highway drive
Edit: Found so far that it is pin A12 on the ecu. How do I find this pin first of all?
Also, do I go from a 12V source to the relay, then to pin A12? Or do I go from a ground source?
#69
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Re: ECT at 205 idling with fans on after highway drive
A12 FANC is a grounded input and it’s typically already wired to the fan from the factory. Try setting it up in hondata if it doesn’t work then you need to run the ground that triggers your fan relay to pin A12.
#70
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Re: ECT at 205 idling with fans on after highway drive
Okay thanks! I found a schematic and pinout diagram for the ecu, so I should be all set. Just gotta figure out the proper way to run a wire into the plug socket if there’s not already one there.
#71
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Re: ECT at 205 idling with fans on after highway drive
Found A12, already had a wire in it. Got my relay all hooked up. Now I just need a decent enough day to take the car outside and let it run up to full temp to see if it works
#72
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Re: ECT at 205 idling with fans on after highway drive
Sweet. Let us know how it works for you. pm me if you need help setting up the fan control in hondata, should be pretty straight forward and easy though.
#73
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Re: ECT at 205 idling with fans on after highway drive
Sure thing, and thanks a ton for pointing out that I could control the fan this way! It’s way better than using the usual fan switch since now I can control the temp that I want it to come on.
#74
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Re: ECT at 205 idling with fans on after highway drive
Finally was able to drive the car and test the fan this week got it wired thru the relay and A12 on the ecu, set to switch on at 195. My LED works now too, figured out it needed the + and - to a specific terminal.
It was only 40 degrees out so I'm not able to test the efficiency of the cooling system yet, but the fan itself and everything works as intended. It cools it from 195 to 190 in about 15-20 seconds at idle. Cycled on maybe 3 times during a 20 minute drive today and only while sitting at stoplights
It was only 40 degrees out so I'm not able to test the efficiency of the cooling system yet, but the fan itself and everything works as intended. It cools it from 195 to 190 in about 15-20 seconds at idle. Cycled on maybe 3 times during a 20 minute drive today and only while sitting at stoplights