When i turn on my electric fan. - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

Nicelyphe · 03-18-2011, 10:12 PM

Well I have an electric fan on my mishimoto radiator, connected to a rocker switch in the cab. Motor idles fine and such, except when I flip the switch on. Once i switch it on i get unusual motor noise and the idle drops a few hundred rpms. About 200-300 from where it normally sits.

lazysk8er2 · 03-18-2011, 10:17 PM

ur drawing too much current...did you use any relays?

Nicelyphe · 03-18-2011, 10:24 PM

No, its straight battery to switch to fan,

josephin510 · 03-18-2011, 10:30 PM

The fan might be drawing to much amps. Check voltage before and after you hit the fans.

Nicelyphe · 03-18-2011, 10:32 PM

There a way to stop that? Im not electricity experienced, and especially not with relays.

90hatchie · 03-18-2011, 11:00 PM

lose the shitty e-fans and go back to the reliable simple clutch fan and shroud

Banana_Cute · 03-19-2011, 12:20 AM

^^^^^

that, I did the E-fan crap. dual too. and then at times my car would run hotter than normal..and also depending on your amp on the switch, it can blow and you can be runnin your car w/o a fan at all.

Been there done that, so i jst went back to the OE set-up with the A/C fan and clutch fan with shroud. worries went away.

Nicelyphe · 03-19-2011, 06:16 AM

E fan was a quick set up since the clutch fan that came with my sr was beat. Anyone know how i can fix this power issue?

lazysk8er2 · 03-19-2011, 07:22 AM

Quote:

Originally Posted by Nicelyphe

No, its straight battery to switch to fan,

hellooooooooooooooooo wire it correctly you answered your own question

Nicelyphe · 03-19-2011, 07:42 AM

I got it all wired up, looking at

Battery to switch
Fan to switch
Fan to ground
Switch to ground

All works, just get the rpm surge when i turn it on, and engine noise as well.

Nicelyphe · 03-19-2011, 08:46 AM

Im starting to think possible alternator going bad? Also get a little rpm drop when i turn on my headlights, dash lights also dim and come back when i turn on the headlights.

lazysk8er2 · 03-19-2011, 10:39 AM

you need some sort of relay to regulate the power cuz ur running the fan at max capacity...you can burn out your fan and blow out your alternator

Nicelyphe · 03-19-2011, 01:46 PM

Ah i see, someone told me it could be grounds since it also does it a little when my headlights are on as well.

jacobs13 · 03-19-2011, 03:08 PM

Fans draw alot of current, so youll need a 30 amp fuse to a relay to the fan then to a switch to ground

Nicelyphe · 03-19-2011, 03:13 PM

Ah i see, any certain kind of relay?

lazysk8er2 · 03-19-2011, 08:37 PM

search there are a ton of diagrams available for efan installs

surfpac · 04-15-2011, 08:16 AM

Your lights dim and idle drop because on initial fan start up the fan/s draw high amps due to a transient response. The amperage settles back down, but it is still drawing amps and make your alternator work harder hence the effect on your idle. even if you had this wired to a relay, the fans will still draw the same amperage. Ok, couple questions:

1. What type of fan/s are you using?
2. Still using stock alternator? (I recommend Quest 125 Amp upgrade if you insist on electric fans, HID's, etc)

I use Audi dual fans with digital 2 speed fan controller and Audi fan resistor. Also 125A Quest alternator. No issues at all.

surfpac · 04-15-2011, 08:23 AM

Quote:

Originally Posted by lazysk8er2

ur drawing too much current...did you use any relays?

Even with a relay the fans will still draw a lot of current.

kanekoa28 · 04-15-2011, 08:45 AM

http://zilvia.net/f/tech-talk/173441...fo-inside.html

heres a good thread to start off with got couple diagrams in there 2

codyace · 04-15-2011, 10:09 AM

There are a few things to address:

1. You should really get a relay in the setup to turn the fans on. Sure the amp draw will still be there, but it will keep things from melting down/failing.

2. The RPM drop is normal with more load on the system. The only true fix is to put a bigger alternator on it (I sell Quest Alternator conversion kits)

Don't read to much into the hype of a stock fan being the cats-ass, they are loud, a PITA to work around, and generally the fluid couplings in them suck anyway. A properly shrouded and setup E fan will work equally good as the stock fan at all times.

(PS: When are you bringing your car up?)

Walperstyle · 04-15-2011, 10:44 AM

Quote:

Originally Posted by 90hatchie

lose the shitty e-fans and go back to the reliable simple clutch fan and shroud

Ignore this guy. ^

You could try installing a better alternator.

Nicelyphe · 04-16-2011, 11:12 PM

Yea, I think im def going to be looking into the upgrade kit through Cody.

03-18-2011, 10:12 PM	#1
Nicelyphe Zilvia Addict Join Date: Jan 2010 Location: PA Posts: 918 Trader Rating: (16) Feedback Score: 16 reviews	When i turn on my electric fan. Well I have an electric fan on my mishimoto radiator, connected to a rocker switch in the cab. Motor idles fine and such, except when I flip the switch on. Once i switch it on i get unusual motor noise and the idle drops a few hundred rpms. About 200-300 from where it normally sits.

03-18-2011, 10:30 PM	#4
josephin510 Zilvia Junkie Join Date: Mar 2009 Location: richmond Age: 32 Posts: 504 Trader Rating: (0) Feedback Score: 0 reviews	The fan might be drawing to much amps. Check voltage before and after you hit the fans. __________________ Trade my Rb25 for some wheels. Buy my Sc300.

03-19-2011, 12:20 AM	#7
Banana_Cute Zilvia FREAK! Join Date: Jan 2011 Location: Irvine, So. Cal. Posts: 1,338 Trader Rating: (16) Feedback Score: 16 reviews	^^^^^ that, I did the E-fan crap. dual too. and then at times my car would run hotter than normal..and also depending on your amp on the switch, it can blow and you can be runnin your car w/o a fan at all. Been there done that, so i jst went back to the OE set-up with the A/C fan and clutch fan with shroud. worries went away. __________________ Simplicity is the key to brilliance

04-15-2011, 10:09 AM	#20
codyace Post Whore! Join Date: Dec 2004 Location: Poconos, PA Age: 36 Posts: 8,030 Trader Rating: (58) Feedback Score: 58 reviews	There are a few things to address: 1. You should really get a relay in the setup to turn the fans on. Sure the amp draw will still be there, but it will keep things from melting down/failing. 2. The RPM drop is normal with more load on the system. The only true fix is to put a bigger alternator on it (I sell Quest Alternator conversion kits) Don't read to much into the hype of a stock fan being the cats-ass, they are loud, a PITA to work around, and generally the fluid couplings in them suck anyway. A properly shrouded and setup E fan will work equally good as the stock fan at all times. (PS: When are you bringing your car up?) __________________ *Want Air Conditioning in your SR20 Swapped car? Check out www.sr20acbrackets.com for more information! Quest Alternator Conversions for SR20!* Check my Group Buy! Tired of lousy internal gates? Go external wastegate with one of my manifolds, Check out my group buy

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03-18-2011, 10:24 PM	#3
Nicelyphe Zilvia Addict Join Date: Jan 2010 Location: PA Posts: 918 Trader Rating: (16) Feedback Score: 16 reviews	No, its straight battery to switch to fan,

03-18-2011, 10:32 PM	#5
Nicelyphe Zilvia Addict Join Date: Jan 2010 Location: PA Posts: 918 Trader Rating: (16) Feedback Score: 16 reviews	There a way to stop that? Im not electricity experienced, and especially not with relays.

03-18-2011, 11:00 PM	#6
90hatchie Banned from the Marketplace Join Date: Dec 2006 Location: yorktown hts ny Age: 32 Posts: 2,984 Trader Rating: (15) Feedback Score: 15 reviews	lose the shitty e-fans and go back to the reliable simple clutch fan and shroud

03-19-2011, 06:16 AM	#8
Nicelyphe Zilvia Addict Join Date: Jan 2010 Location: PA Posts: 918 Trader Rating: (16) Feedback Score: 16 reviews	E fan was a quick set up since the clutch fan that came with my sr was beat. Anyone know how i can fix this power issue?

03-19-2011, 07:42 AM	#10
Nicelyphe Zilvia Addict Join Date: Jan 2010 Location: PA Posts: 918 Trader Rating: (16) Feedback Score: 16 reviews	I got it all wired up, looking at Battery to switch Fan to switch Fan to ground Switch to ground All works, just get the rpm surge when i turn it on, and engine noise as well.

03-19-2011, 08:46 AM	#11
Nicelyphe Zilvia Addict Join Date: Jan 2010 Location: PA Posts: 918 Trader Rating: (16) Feedback Score: 16 reviews	Im starting to think possible alternator going bad? Also get a little rpm drop when i turn on my headlights, dash lights also dim and come back when i turn on the headlights.

03-19-2011, 01:46 PM	#13
Nicelyphe Zilvia Addict Join Date: Jan 2010 Location: PA Posts: 918 Trader Rating: (16) Feedback Score: 16 reviews	Ah i see, someone told me it could be grounds since it also does it a little when my headlights are on as well.

03-19-2011, 03:08 PM	#14
jacobs13 Zilvia FREAK! Join Date: May 2009 Location: Long Beach Age: 29 Posts: 1,061 Trader Rating: (27) Feedback Score: 27 reviews	Fans draw alot of current, so youll need a 30 amp fuse to a relay to the fan then to a switch to ground

03-19-2011, 03:13 PM	#15
Nicelyphe Zilvia Addict Join Date: Jan 2010 Location: PA Posts: 918 Trader Rating: (16) Feedback Score: 16 reviews	Ah i see, any certain kind of relay?

04-15-2011, 08:16 AM	#17
surfpac Zilvia Member Join Date: Nov 2001 Location: Fort Lauderdale, FL Posts: 155 Trader Rating: (1) Feedback Score: 1 reviews	Your lights dim and idle drop because on initial fan start up the fan/s draw high amps due to a transient response. The amperage settles back down, but it is still drawing amps and make your alternator work harder hence the effect on your idle. even if you had this wired to a relay, the fans will still draw the same amperage. Ok, couple questions: 1. What type of fan/s are you using? 2. Still using stock alternator? (I recommend Quest 125 Amp upgrade if you insist on electric fans, HID's, etc) I use Audi dual fans with digital 2 speed fan controller and Audi fan resistor. Also 125A Quest alternator. No issues at all.

04-15-2011, 08:45 AM	#19
kanekoa28 Zilvia Member Join Date: Nov 2006 Location: HaWaIi Posts: 159 Trader Rating: (3) Feedback Score: 3 reviews	http://zilvia.net/f/tech-talk/173441...fo-inside.html heres a good thread to start off with got couple diagrams in there 2

04-16-2011, 11:12 PM	#22
Nicelyphe Zilvia Addict Join Date: Jan 2010 Location: PA Posts: 918 Trader Rating: (16) Feedback Score: 16 reviews	Yea, I think im def going to be looking into the upgrade kit through Cody.