I swapped my motor and went single turbo, using a blitz FMIC, but the kit I bought used came with custom rad mounts that sit the rad very close to the intercooler at an angle that my fans will not clear my oil cooler lines. In desperation to get the car running sooner, I purchased some low profile high flow fans from an autoparts store. 2, 12inch 1200 CFM rated each.

I wired the fans to the green and yellow wires on the stock fan connectors. Fans run when my thermoswitch kicks in at 185F.

However, temp keep creeping up slowly at idle, stabilizing around 210-215F at 75F ambient. This is way to hot for my liking.

My questions are:

2 of the wires are unused on the connectors, does this mean i'm only getting low speed voltage? If so, what can I do to fix this? I'm not worried about on/off...i just want high flow at all times.


Am I better off getting the radiator brackets fabricated to sit the radiator further back and returning to stock fan setup? Stock is rated at 2700CFM which isn't to far off from these aftermarkets.

Should I just go ahead and buy low profile summit racing fans?

 

There's no voltage step-down provision for the stock fans. The different wires energize different windings inside the stock fan motors, yielding different speeds.

Those will probably put you in the same boat you're currently in. I suggest you look at SPAL fans. They make quality fans with honest ratings. However, the fact that you need low profile fans is going to force you to the lower CFM end of the spectrum.

 

Really, stock fans are the way to go. Aftermarket fans, in my experience, are a) unreliable, b) noisy as hell, c) don't flow as much air as they should.

I come from an FC background, and FC guys have the mechanical clutch fan that everyone wants to get rid of. Everyone tried aftermarket electric fans and quickly gave up.

I'm assuming that you have an R1/R2 with the second oil cooler since you're saying the oil cooler lines are in the way. Search in the Build Threads section for my recent build, I ran into the same thing - Blitz FMIC, R2 with the stock R2 oil cooler hard lines, and a big Koyo rad.

My solution was to remove the stock hard lines and go with aftermarket braided AN lines and fittings. So far so good, and gave me plenty of room. I did have to do some minor notching of the plastic shroud on the stock fans and I made a new cross brace to clear the fans better, but there ya go.

Unfortunately, there's not a good shortcut out there. If you want the car to cool right, you need the stock fans, and if you want the stock fans, you gotta work for it.

Dale

 

Thankyou sir, ill definitely be doing the an fittings

 

Stock fans are good but if you want ultimate cooling go with Maradyne electric fans. I have a full bridge making 810 RWHP. In the summer Texas heat when it's 110 degrees out side my FD can be stuck in stop and go traffic with the A/C on for over an hour moving at maybe 5 mph and my coolant temps never get higher than 84 Celsius (183 Fahrenheit).

Coolant temps stay in the 79 - 84 Celsius range (174 - 183 Fahrenheit).

I have the Maradyne jet stream platinum dual 12 inch fans that pull 3150 cfm. I also have an upgraded radiator, it's a Howie.

While the stock fans are great, they can't touch the maradynes.

 

I was under the impression that it was the difference of being ran in series or in parallel that was controlled by the relay.