I designed this fan mount with optimal air flow in mind. With this mount, the fan is positioned so that it is close to and aimed directly at the motor. The angle of the fan works in conjunction with the air passing through the body (from front to rear) to provide optimal cooling while driving. Dimensionally, it is based off of the stock chassis brace, so it is a direct fit replacement using the stock hardware. To mount the fan use 3mm screws, the lower screws need to be 3mm longer than the fan is deep and the upper screws can be up to 8mm deeper than the fan, but 5mm is suggested. My fan is a 7mm deep fan, so I use 3x10mm and 3x12mm screws. As you can see in the pictures, I currently have socket head screws installed and the body still has clearance, but I will be getting aluminum button heads to further lower the weight.
I race on an off-road carpet track and having this allowed me to gear up a couple more teeth while keeping my temps down. Plus, I wired the fan directly to the battery input on my ESC, so it is on whenever the battery is plugged in, allowing me to turn off the ESC and still leave the fan running after I race for faster cool down.
Since the B6, B6.1, T6.1, and SC6.1 share the same waterfall, this fan mount will fit them all (with the laydown or layback transmissions only).
This is a great material, but like most plastics, it can strip when screws are overtightened, so please tighten carefully. Additionally, you may need to clean some nylon powder out of the blind holes. A small drill bit works well. Also, adding a small drop of oil to the pivot ball prior to insertion is recommended for ease of installation into the fan mount.
NOTE: Due to the width of this fan mount, it may not be compatible with some motors where the solder tabs are closer to the center of the motor (such as TSR). Thank you Patrick for bring this to my attention.
NOTE: Due to the fan's close proximity with the motor, a motor that exhibits strong external magnetism (such as a Schuur Speed 17.5) may cause interference with the fan motor, leading to the fan not spinning. If a motor screw will stick to the outside of the motor, it may have enough magnetism to keep the fan from working correctly, and this fan mount may not work with your motor application.
Because there are so many variables, I cannot guarantee that this fan mount will work with every motor and/or setup.
Thank you for supporting my RC habit!!