make cooling fan run with key off?

[ARRESTmeRed04]

is there a way to make the cooling fan run even when the key is off, i know i could put a switch in and do it that way but i'd rather have some sort of thermostat that would run untill a a preset temp. i know hayden fans makes a t stat and relay kit i guess i could just add to the truck but wanted to make sure the ecm couldn't do it, i think that would be better. and i don't like the way the hayden kit just sits in the rad. i'd like somethin using the coolant temp, any ideas?

 

[Bone]

I have an additional electric fan that goes on/off at a temp with the engine off. Bought the kit from Boomer. Wanted to somewhat cool the engine with the engine off at the track. Does not circulate the coolant however.

 

[azpyroguy]

No. Our fans are hydrostatic/hydraulic. As is driven by the power steering pump.

The only way to get a fan to run with engine off is to install an electric one with a controller unit.

 

[ARRESTmeRed04]

ok, i thought we had electric fans, bone how does your fan kit read temp? in the rad or in a collant passage?

 

[Bone]

ok, i thought we had electric fans, bone how does your fan kit read temp? in the rad or in a collant passage?

You adjust it (screwdriver) with a dial. The temp probe you attach to the radiator. So I set mine to go off about 150-155 F as I recall. I jsut watched the temp rise and when the temp reached my desired temp, I had it turn on. It is pretty simple. Don't need to be a mechanic to install it. Boomer's kit can control two fans too.

You can also either push or pull the air as desired.

I don't know if Boomer is still a vendor, but if you call him just ask for a Viper Fan kit. I think there is are two versions of the fan (amount of airflow). I took the larger one. I don't remember the flow rate. The tough part is pushing air through 3 sets of cooling fins on our trucks. I still have the stock hydraulic fan running too.

Many of the Hemi guys are taking out their hyd fans and putting in electric fans to save a few ponies. Their kits may just fit ours too. I never really thought to ask.