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for any one who has installed one what side did you put it on ive seen it both ways but on my i out it on the inside so it kind of lays on the rad and fasined it down. seems to work great but was wonder if theres a beter way to do it
also i got a little creative and you know how your filter sits right above this so i cut a hole in the plastic under the filter so the fan forces air in it but then i realized that its forcing hot air do u think forced hot air is better or worse than not froced slightly colder air?
 

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You want the E-fan on the engine side of the radiator, pulling the air in through the radiator.

You do not want your filter directly in the way of your fan's exhaust. It has created many running problems for people. Either route the filter to a new location, or make a sheild for it so the air isn't forced in.
 

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Well...I bought one but haven't had time to put it on yet. It's a big fan from a Ford something or other.

If I were you, I'd get Maxima dual fan. They seem to work out well, and fit the radiator pretty completely. Also, you can get them for pretty cheap from either a junkyard, or just 2nd hand from somebody.

*cough cough*

<http://z31.com/4sale/?87844>
 

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so how would you wire an E-fan anyway? I might end up doing that to mine my moter has been running a little hotter than normal lately.
 

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An electric fan ususally does a no better job of cooling than the stock fan. Ususally it's a little worse. But the trade off is increased engine space, and slightly more HP

You most likely have a different problem:
<http://www.az-zbum.com/repair.overheat.shtml>

As for wiring, there's many different ways:

<http://web.tampabay.rr.com/zrelated/Efanwiring.htm>

<http://home.comcast.net/~cktbreaker/Efan.htm>

Basically you need to wire in a Relay that will give your fan(s) enough amperage. Then you need to find an ignition dependent wire so the relay on gives power when the car is done.
 

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something u might want to consider too....

1. watch what u do, with regard to Hydro locking ur throttle body....I ve seen guys just put on a K&N filter and put it where it can get too much water in a rain storm or puddle...Here in Fl we get real palmetto pounders and PUDDLES.... U don't want to be sucking up water....its not a shop vac.
 

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hydrolocking the engine requires you to submerge the intake at least 3/4 full of water... rare for z's to do so.. usually if you do, you've got bigger things to worry about... such as why you just drove your z31 into a lake..

anyway

i've looked around at some aftermarket fans and so far the best performance at a moderate price i've seen is the flex-a-lite 16" syclone fan... pulls 2500cfm at 17 amps.. combine this with a well designed custom shroud and you'll be pulling almost enough air for any turbo z through the entire radiator.. if you need more air you can always toss another small fan on the front of the rad...

there are some other more powerful 16" fans, but they cost quite a bit more and draw much more current (Spal's extreme performance 16" pulling 3000 cfm at 29 AMPS!)
 
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