how much hp from an electric fan swap?

[nevermore82]

i searched this but couldent find anything... im just curious if anyone knows how much horsepower is gained from swaping your belt driven fan to a electric fan if any?thanks

[AZhitman]

Next to none - Keep in mind that the fans will create additional draw on the alternator...

You might free up a hp or two, but it's negligible.

Mechanical clutch fan is superior to e-fans for efficiency and cooling.

[JNM240]

Next to none - Keep in mind that the fans will create additional draw on the alternator...

You might free up a hp or two, but it's negligible.

Mechanical clutch fan is superior to e-fans for efficiency and cooling.

All true, but the throttle response is well worth the mod, IMO. Espcially when done with lightweight crank pulley and lightweight flywheel. I drove around Houston last summer with the clutch fan over the electric fans (redundant), and once the clutch fan was removed, felt like a peppier car.

[nevermore82]

cool thanks... acually what i ment to say is how much horsepower would it free up.. not make... i know it wouldent make any... thats a good point about the throttle responce and more efficient cooling... i have just seen where alot of ppl on here say to get an electric fan or have gottan electric fans.. so i just wanted to know what the perks were.. would it be better to get a bigger amp alternator or would it be fine with the stock? i was planning on gettting a new stock one anyways...

[glitched]

Mechanical clutch fan is superior to e-fans for efficiency and cooling.

http://home.satx.rr.com/nissan...t.htm

shows that this is dependent on the e-fan. mechanical clutch fan is not as efficient as you would think, depending on RPMS.

Also with an e-fan, if you use a fan controller that detects temps, the fan wont ALWAYS be on, so it wont ALWAYS be drawing from alternator.

[Chukidori]

Ther

http://home.satx.rr.com/nissan...t.htm

shows that this is dependent on the e-fan. mechanical clutch fan is not as efficient as you would think, depending on RPMS.

Also with an e-fan, if you use a fan controller that detects temps, the fan wont ALWAYS be on, so it wont ALWAYS be drawing from alternator.

There is a write up on how to make your OWN fan control unit on 240sxforums.com

Its very simple. you can also swap altima fans if i remember correctly.

[Bigvinnie]

It's not a HP gainer it's a torque gainer. This modification makes about 3LB.s/ft of torque to one HP in lower RPMs under 3000RPM. City MPG increases since when the engine goes idle the clutch fan would have to engage to drop coolant temperature for the engine. Off the line in lower RPM's below 2500RPM it drops load, increasing the fuel economy. So at idle and at lower RPM's (below 3000rpm) you save power and fuel. It also maintains a healthier coolant temp then clutch fans do since thermostatic switches are more consistent, then the clutch in general.Thats it in a nut shell.


Modified by Bigvinnie at 8:48 PM 4/18/2007