[RocktimusPryme]

https://youtu.be/uzW2CVt0C2k

I mentioned in some other threads that I was in the middle of a junkyard brushless PWM controlled fan swap on my 67 Firebird.

That has been implemented and is successful. Short background, my car has a 461 and a 19" clutch fan with a cold case radiator. Been in for years, and its fine, but like many setups it would creep at stoplights, or at a stop. Never kept me from driving it but it did make me afraid of getting doing something like Power Tour where very slow moving traffic was a possibility.

My fan swap from a 2009 Volvo XC90 has been in for about a month now, and even at only 60% duty cycle, it keeps the car at at the thermostat. Even better, when its been heat soaked from a stop, it will now come down in Coolant Temp at idle, where before I would have had to start driving to get the temps to come down. And unlike some electric fan swaps I dont have any issues at cruise speeds.

Important Notes:

1. I have a Terminator X, which allows for a Negative PWN signal. You arent dead in the water if you dont have a similar system, but you would need a controller to use a brushless fan. Interestingly, I dont think the Sniper systems have a PWM output but some of the other affordable units (FITech, Aces) may. Not sure. There is probably someone out there on YT who has perfected a cheap controller.

2. These fans while large in diameter are less than 4" in depth. Way less than the famous Lincoln Mark VIII fan so they will fit in tighter spaces.

3. DO NOT Wire them backwards. While a normal brushed fan will spin backwards, you will murder a PWM fan. I did it twice. I started with a 2004ish Mercedes SL500 Fan. Ended up using the Volvo fan because I killed the Mercedes one. Then I killed a 2005 Volvo one. I still think the shroud of the Mercedes fan is a little better, even though the volvo one has proven to work fine.

4. These Bosch fans are in all sorts of stuff from Mercedes, BMW and Volvo. Volvo in particular seems to have gone to a proprietary fan in like 2007?? Plug and shroud are similar but the motor is a little different. Other than that all the 18.25 Bosch fans will just hop from shroud to shroud with a few screws.

5. I did have voltage issues after the swap with a 78 amp 12SI alternator. Especially once the fan got over 40% duty cycle on my table. I swapped to a 140 amp 12SI that was on sale (otherwise I probably would have done a CS130 swap) and still had issues. Then I upgraded my charge cable size and was fine after that. So you may need a new alternator, but you also may just need to have a bigger charge cable if you have a 94 amp or larger alt.

I know the video is a little long, Ill probably cut it down later and release a short version as well. But YT seems to prioritize longer content sometimes. Ask any questions and Ill try to answer, I know there are a lot of horror stories with E fan swaps going wrong, but this one is good so far.

This really wasnt hard. If I hadnt killed two fans experimenting I would have been into this for the whopping cost of $5 for the fan, a $10 Maxi Fuse, and then my alternator upgrade if you want to count that.