Topic: wiring electric fan

[Mr_Random]

I plan on using one or two unused spots in my PDC for a 40amp fuse, jumper a wire to the fuel pump feed, and run one or two switches. If only one, it'll be three positions; controller, on, and off. If two, I will just add a two position with "high" and "low" inline with the first switch, to specify speed whether I'm in control or not.

Does that make sense? I'm usually pretty good at this but it's kinda late...

[jfrabat]

Which fan do you have?  The reason I ask is that low speed of the FoMoCo fan is more tan enough to keep the Jeep cool (you dont really need the highspeed unless you are already overheated and need to cool the engine down PRONTO!).

[Mr_Random]

Which fan do you have?  The reason I ask is that low speed of the FoMoCo fan is more tan enough to keep the Jeep cool (you dont really need the highspeed unless you are already overheated and need to cool the engine down PRONTO!).

None yet, but the plan is a taurus/FoMoCo. I have heard that before, that's why I have a two step plan. I'm thinking wiring in a high speed is good insurance down here (south western AZ), where it's already getting into the triple digits this week.

[jfrabat]

None yet, but the plan is a taurus/FoMoCo. I have heard that before, that's why I have a two step plan. I'm thinking wiring in a high speed is good insurance down here (south western AZ), where it's already getting into the triple digits this week.

Well, I live in Miami; not desert, but pretty hot none-the-less, and I have yet to have the Jeep reach 190* while runing the fan in constant low speed.  With the Delta Current Controller (which is conencted to the high speed side - but keep in mind the controller has variable speeds according to temp), it ussually stays put at 210* (except when on the highway, when it goes down to about 195*); anything above that, and the controller takes action to keep it at the 210* mark).

[Mr_Random]

Well, I live in Miami; not desert, but pretty hot none-the-less, and I have yet to have the Jeep reach 190* while runing the fan in constant low speed.  With the Delta Current Controller (which is conencted to the high speed side - but keep in mind the controller has variable speeds according to temp), it ussually stays put at 210* (except when on the highway, when it goes down to about 195*); anything above that, and the controller takes action to keep it at the 210* mark).

Hmm... Florida has the highest average temperatures in the world, but definately not highs at 120...

The Jeep was trying to overheat today, but I just bought new radiator hoses and need to put the shroud back on, that and straightening out some knocked rad fins should help it cool, but I can't wait for an electric fan! It feels so good with MPI, I know it will be even better without that danged mech fan! I'm gonna start a build thread detailing all my plans, I'm just stinking up this thread...

[jfrabat]

It ussually does not go up to120*, but 100* are quite common during the summer, and the Jeep does fine (the fan actually turns off after it is done, and does not go to full speed, so there is plenty of cooling capacity in reserve).

Another thing that will help keep the Jeep cool is an aluminum radiator; I got mine for close to $100 on eBay (and it is the one with the aluminum tanks as well, so no issues with that!), and it cools much faster than the stocker I had on (even though this one is single row).

[Mr_Random]

It ussually does not go up to120*, but 100* are quite common during the summer, and the Jeep does fine (the fan actually turns off after it is done, and does not go to full speed, so there is plenty of cooling capacity in reserve).

Another thing that will help keep the Jeep cool is an aluminum radiator; I got mine for close to $100 on eBay (and it is the one with the aluminum tanks as well, so no issues with that!), and it cools much faster than the stocker I had on (even though this one is single row).

That's what I'm looking forward to; efficiency. If I don't need the fan, then it isn't there! makes me happy... haha.

I have an aluminum, but it's a pos cheapo replacement. The size of pre-87 XJ radiators is identical to YJ's, but the mounting is different... I think I might buy a junkyard one to modify, then find a fancier YJ replacement to actually use.

[chardrc]

aren't there soposed to be corrosion problems with having aluminum (radiator) and copper (heater core) messing up the cooling system? or am i just talking crazy again

[Jeffy]

aren't there soposed to be corrosion problems with having aluminum (radiator) and copper (heater core) messing up the cooling system? or am i just talking crazy again

That only happens when different metals are in direct contact with each other.  BTW, anti-freeze has anti-rust/corrosion properties in it.