Replacing clutch fan with dual electric fans.

thebeastjuggalo · 12-12-2006, 03:10 AM

I am planning on taking out my clutch fan and putting in a couple electric fans that i will pick up from the junk yard, for my '95 jimmy.

I was woundering if anyone could give me an insite into the best steps to take to do this (as i have never messed with anything the belts were attatched to that i couldnt easily put back).

Blind · 12-12-2006, 03:22 AM

dual fans are not the way to go IMO.

get a fan out of a ford taurus 3.8L, it has a 16" electric fan that flows almost 3000cfm, and has 2 speed settings.

you'll need a 30amp relay (or 2, if you want to use both speed settings) and either a thermostatic switch, or a manual switch.

you can get a temp switch from summit racing, I picked one up for $14 that turns on at 185* and turns off at 170* and I set that up to turn on the low speed of the fan, the high speed I put on a manual toggle switch, but that is also triggered by the a/c relay, so when I turn the a/c on the fan jumps to the high speed setting.

BlazerLT · 12-15-2006, 10:15 PM

I would have it triggered by the AC relay seeing that when you are rumbling along the highway you don't need the current draw and a fan roaring when you are going 70mph.

You will lose horsepower due to the load and render the performance and economy differnce to nothing.

blazes9395 · 12-20-2006, 11:07 PM

Quote:

Originally Posted by BlazerLT

I would have it triggered by the AC relay seeing that when you are rumbling along the highway you don't need the current draw and a fan roaring when you are going 70mph.

You will lose horsepower due to the load and render the performance and economy differnce to nothing.

Thats not necessarily true. Yes, it will put a load on the system when its running, but the fan is not always on, especially like you mentioned when your going down the road at highway speeds. If this is wired right, I think rilth has a "how-to" on this that was done good, if its done right, you'll actually have a net increase in horsepower. Besides GM is using duel electric fans in their newer trucks(silverado for instance), its used it in their high performance cars(camaro, vette), so its not a bad idea, and probably a good mod.

BlazerLT · 12-21-2006, 02:19 AM

Sorry, I worded it wrong, I "wouldn't" have it triggered by the AC relay seeing it will be putting an unnecessary load on the electrical system when you are travelling down the road.

No need to have to running when you are having 70mph air running through the rad in the first place.

Wonder is there is someway to have it triggered by th e AC relay, but say only at low speeds where it will be needed.

thebeastjuggalo · 12-21-2006, 03:20 AM

Quote:

Originally Posted by blazes9395

Thats not necessarily true. Yes, it will put a load on the system when its running, but the fan is not always on, especially like you mentioned when your going down the road at highway speeds. If this is wired right, I think rilth has a "how-to" on this that was done good, if its done right, you'll actually have a net increase in horsepower. Besides GM is using duel electric fans in their newer trucks(silverado for instance), its used it in their high performance cars(camaro, vette), so its not a bad idea, and probably a good mod.

any chance you have a link to this "how-to"? (cause i dont realy have a clue how to do it)

BlazerLT · 12-21-2006, 03:29 AM

How about visiting the how to section.

blazes9395 · 12-21-2006, 11:12 PM

Take a look at this;
http://www.s10forum.com/forum/showthread.php?t=59490&highlight=hayden%2Fimperial

redwheeler · 12-22-2006, 09:26 PM

changing your fans to electric does nothing at all for preformance of mileage i took the fan off my truck completely and ran it for a while and it did nothing

BlazerLT · 12-23-2006, 08:36 AM

Quote:

Originally Posted by redwheeler

changing your fans to electric does nothing at all for preformance of mileage i took the fan off my truck completely and ran it for a while and it did nothing

You are right. It disengages and puts relatively no load on the engine when driving and when it is not hot enough to engage the clutch.

Cloud Strife · 12-23-2006, 11:53 AM

Quote:

Originally Posted by redwheeler

changing your fans to electric does nothing at all for preformance of mileage i took the fan off my truck completely and ran it for a while and it did nothing

Is there a HP increase if any?

hotrod_chevyz · 12-23-2006, 03:48 PM

clutch type fans are way more reliable. Electric fans have all the sensors,relays, ect that make them a lot less dependable, and as for power increase yes a clutch fan does take some power to operate but to put an electric fan in as a power mod would be pointless. I would stick with a clutch fan.

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