I searched on this topic but couldn't really find anything in detail. For my radiator set up, I have to run a single fan because the stock fans are too large and thick, and won't clear.

This is the fan I'm going with:
Proform 141-644 Officially Licensed GM Universal Electric Fans

It has 2 wires, a blue (which looks to be the +12V) and a black (ground).

Now to connect this fan up to the stock wiring harness, can it be as simple as chopping off one of the stock fan's connectors and splicing it over? The stock connectors have 4 wires coming out of it instead of 2, will that be an issue?

It looks like on the stock connectors, on one the 12V is the White wire and the Red w/ Yellow stripe on the other.

Is there a simple way for me to wire in only 1-speed for this fan, so it will be either on or off? Preferably either the Medium or High speeds only

 

Not sure what your exact situation is...so I'll just toss this out...
What radiator do you have? Wouldn't it be easier and cheaper to just get a radiator that's able to accomodate the stock fan and shroud? The radiators are widely available and the stock fans are efficient and reliable.

 

I'm partway through an install of a Blitz front mount in my car. Few thoughts -

- The stock fans work great. Yep, they're thick, but they flow a LOT of damn air. Many aftermarket fans don't flow much air and are LOUD as HELL. They're also typically junk. Ask some FC guys, they've tried all kind of electric fans and have had many woes.

- With my setup, I have the Blitz FMIC (thick), Koyo rad (thick too), AC condensor (in the way), a Miata battery in a modified stock tray (are you kidding?) and guess what? Stock fans.

Now, it wasn't easy. To make room for everything I had to -

- Ditch the stock R2 hard oil cooler lines for braided lines. The hard lines go right where the radiator wants to go.
- Fab a new cross brace as the stock one is all in the way
- Notch and clearance the plastic fan bracket in a few spots
- Notch the small mounts on the frame rails that the cross brace bolts to

It wasn't easy, but it's in there.

As an alternative, you can look for OEM fans that are thinner than the stockers. Aftermarket fans are just not that great.

But, all that aside, if you DID want to run an aftermarket fans, you'd probably remove the stock fan relays and just keep one. I would run the one the ECU can switch on, with the PowerFC that can be set to a lower turn-on point. Run the output from that relay to the new fan, other wire to ground, and there ya go.

Dale

 

This is for a v-mount I installed and currently the slim, single fan I have on still touches the oil cooler lines in the middle. I was able to drop the 2 brackets holding the lines up to the frame to drop them down enough for the radiator to sit at its correct angle, so I got off easy there.

Likewise, the v-mount positions the radiator right in the way of where the stock cross brace goes, so I will have to fab something up later in a different spot.

If I kept the stock fans, I don't think there is anyway to keep the stock hardlines for the oil coolers.

Are there any pre-made stainless braided lines for the dual oil coolers? Or did you have to make your own lines?

Currently, I have the single fan's 12V cable connected to the stock harness's White wire. Hopefully this will do the job and I can leave the relays alone, or simplify them later.

I know the single fan won't pull as much CFM as the stock fans, so I'll compensate by having the PowerFC turn on the fans at a lower temp. I'm interested to see how efficiently it can work. Either way, it allowed me to install the v-mount in the simplest manner.

 

Going to braided lines from the stock hard lines isn't too bad. Cost is a bit, about $120-150 in materials for the AN fittings and line. Real easy to assemble though. That stock oil cooler hardline is WAY in the way.

The power from the fan needs to run through a relay since the fan pulls a lot of current. The stock trigger without the relay can't handle it, hence the relay.

I just started a build thread, coming soon I'll have pics of my oil cooler line setup and my custom crossbrace. Hint - it's L-shaped aluminum from McMaster-Carr cut to fit. I then drilled a number of holes and installed Nutserts to make threaded points for mounting stuff to it. Worked great, currently at the powdercoaters .

Dale

 

Hello,
Any updates on this? I'm also switching to a single and need a definite answer on the fan.

Jason