Is anybody controlling their electric fans with the Sniper EFi?

[70ChargerRT]

I’m running 2 spal fans from my Becool set up for my 440. The becool water temp sensor has the fans kicking on at 195 and shutting off at 175. I’m running a NOS Stant 180* Hi Flo T-Stat. I’m thinking the sensor from Becool May not be idea with the set up I have so I was thinking about controlling the fans from my Sniper if I need to make adjustments. I’m just wondering is it pretty simple to do and what do you guys have your fans set up at as far as kicking on and off?

 

[pnora]

My experience with electric fans is once that engine and the rest of the system is heat saturated the fans rarely shut off at low speeds or sitting still. Lot of people seem to think they should cycle and when they don't something is wrong. The fact is they have to run. Look at mechanical fans they are pulling all the time. My point is no mater what you do controlling your fans you will see little to no difference. Myself I would keep running it the way you have it now. Simple and less electronics involved.

 

[505Coronet]

I have MSD Atomic fuel injection, predates the sniper but same principal. I had the exact same setup you are describing with a temp sensor controlling a relay and it was too hot for my liking.

The atomic and the sniper both provide fan control wires as a ground, i have mine set to 180 and the controller grounds a relay that controls the fans. Super simple. I also having it controlling a remote trans cooler fan that comes on at a different temperature, love the adjustability of it.

Ill have to disagree with the above poster, my electric fans do cycle on and off pending the outside temperature/how hard I'm running it. I think correctly sized electric fans are the key, most guys size them large enough to "keep it cool" which results in them running 100% of the time.

 

[pnora]

I have MSD Atomic fuel injection, predates the sniper but same principal. I had the exact same setup you are describing with a temp sensor controlling a relay and it was too hot for my liking.

The atomic and the sniper both provide fan control wires as a ground, i have mine set to 180 and the controller grounds a relay that controls the fans. Super simple. I also having it controlling a remote trans cooler fan that comes on at a different temperature, love the adjustability of it.

Ill have to disagree with the above poster, my electric fans do cycle on and off pending the outside temperature/how hard I'm running it. I think correctly sized electric fans are the key, most guys size them large enough to "keep it cool" which results in them running 100% of the time.

I never said they do not cycle. I explained what I have encountered. Also A/C makes them run more and with A/C on at low speeds and idle they need to run. You basically agreed to my statement by saying ambient temperature and running conditions in your last paragraph.

 

[BeepBeepRR]

I had the Sniper controlling fans on the Cutlass 5.7 LS swap I did. I had them come on at 175 my thoughts were even if they come on at that temp the engine is still going to get hotter. So pretty much they would run constantly until the temp got below 175.

 

[diesel_lv]

When I used electric fans w my Fitech, I used the Fitech to control the relays. It also provided for a/c. You have more adjustment w the fuel injection controlling the fans. Quick bit of info for on/off temps. Turn fans off and drive on interstate at speed and see what temp engine settles in at. Set fan "off" temp 10° above that. Set "on" temp 10-15° above that. This will keep fans from running while on the highway. If it gets too hot on the highway without fans running, then some part of system is inadequate, shroud, bottom hose, thermostat, radiator, pulley ratio etc...

 

[70ChargerRT]

I have MSD Atomic fuel injection, predates the sniper but same principal. I had the exact same setup you are describing with a temp sensor controlling a relay and it was too hot for my liking.

The atomic and the sniper both provide fan control wires as a ground, i have mine set to 180 and the controller grounds a relay that controls the fans. Super simple. I also having it controlling a remote trans cooler fan that comes on at a different temperature, love the adjustability of it.

Ill have to disagree with the above poster, my electric fans do cycle on and off pending the outside temperature/how hard I'm running it. I think correctly sized electric fans are the key, most guys size them large enough to "keep it cool" which results in them running 100% of the time.

I’d just happen across this as I’m using Vintage air. They also show dual fans being controlled by the sniper. I’m guessing all I need to do is run the temp sensor wires straight in to the Holley. Wonder if I can wire both temp sensors together then run 1 wire in to the Sniper or do I still need run them separate like in the pic shown even though I want them both to kick on at the same time?

 

[pnora]

The way I read it you will only be using the sniper's temperature sensor. You will need to wire it the way the diagram shows with diodes and a trianary switch. You will then set each fans operations through the sniper's computer.

 

[6PKRTSE]

I have dual fans. The first one I turn on manually with the overhead switch panel on the cage. The second fan is controlled by my Racepak to come on at 180 degrees which it almost never reaches even in daily rush hour traffic. 176 is where it usually stays with only the one fan.

 

[70ChargerRT]

The way I read it you will only be using the sniper's temperature sensor. You will need to wire it the way the diagram shows with diodes and a trianary switch. You will then set each fans operations through the sniper's computer.

Yes that’s the way I took it but if you have both fans coming on the same time can you tie both wires green and blue together and then have 1 wire going in the sniper to have them both come on or do you still need to hook both green and blue separately? That’s the only thing I’m confused about.

 

[pnora]

Yes that’s the way I took it but if you have both fans coming on the same time can you tie both wires green and blue together and then have 1 wire going in the sniper to have them both come on or do you still need to hook both green and blue separately? That’s the only thing I’m confused about.

Yes if you want both fans to come on at the same time you can control both relays with the one wire from the Sniper. I would use only one of the two wires and set the parameters for that circuit. Hooking them together could be an issue.

 

[70ChargerRT]

Yes if you want both fans to come on at the same time you can control both relays with the one wire from the Sniper. I would use only one of the two wires and set the parameters for that circuit. Hooking them together could be an issue.

Thanks!!!