McKrakken

At my local carpet track, it seems that most guys are running fans on their motors. The language used is pretty much.. "get a fan on that thing!"

What's the thoughts on running a fan?

i ask because I was out on the Tekin website looking up the capabilities of my ESC to data log. Included was a story of how a sponsored driver was complaining that his car seemed sluggish (17.5 stock). Datalogging showed that before the race even started, the battery voltage had already dropped due to the fan pulling .2 amps. This got me thinking!

Is it better to gear down a bit to not have to run one, or run one and accept that the fan is sucking power from the battery?

bobf24

iTrader: (28)

you could just run the fan off a separate small battery if its an issue

windellmc

iTrader: (4)

A sponsored driver that I trust said the fan was absolutely needs for running carpet and 17.5. My 8.5 gets much hotter on carpet than dirt.

Phillip F

iTrader: (43)

Stock class... run with fan on motor ESPECIALLY carpet IF you want to be competitive. ESC doesn't need fan for 17.5 and 13.5t motors.

MOD.. NO FAN on motor ... WITH fan on esc...... ESPECIALLY CARPET

Phat-Boy

iTrader: (25)

I think if motor temp is less than 150~ 160 no need fan.

coaltrain

iTrader: (1)

How do you wire a fan motor, just solder fan leads directly to battery posts?

Matt Trimmings

iTrader: (170)

if you want the fan at 8.4v. I usually run it off a spare slot in the receiver.

kcooper273

iTrader: (63)

https://www.amainhobbies.com/yeah-ra...yABEgKN9_D_BwE

I run one of these on my 17.5, it makes a difference. I have a few holes in the body to pull "fresh" air in. I've only run this setup once so far, and forgot my temp gun. But I could hold my finger on the motor much longer than I could without the fan. Same gearing.

Krio

iTrader: (159)

I try to set my cars up to not need fans. I just don't like the additional point of possible failure, but if you are running faster lap times with a setup that puts your motor over 170, then add a fan.

That story on Tekin's site was for a 21.5 turn class, I believe. Every fraction of a volt counts even more in that case and they weren't going over 140 degrees even without a fan.

Sometimes all you need is a clip on heatsink. With proper airflow through the body, a heatsink alone can reduce temps by 20-30 degrees without the added power draw of a fan.

mes

The Muchmore Fleta Euro V2 has a separate motor fan power output, so I'll probably use that if I need one running 13.5 outdoors.

billdelong

iTrader: (33)

my Rx only has 1 extra slot which is used for the PTX, my HobbyWing ESC XERun V3.1 has an extra slot for the fan to the motor (which I run in my mod setup), but my HobbyWing Justock isn't quite as fancy so I splice soldered my motor fan with the PTX... I could also use a Y-Harness but didn't want to add any extra weight and messy wiring in my stock racer

urnotevenwrg2

iTrader: (1)

I gear my car so the motor comes off around 150° with no fan after a full battery. If your gearing is right, the motor will get to that temp after about 5 minutes, but it won't get any hotter.

Then, I run a fan to keep the motor cooler than that, which makes it more consistent through a run because it never even gets warm (the last time I checked, my motor was 94° after a race).

Setting up your car this way gives you that safety net in case of fan failure.

Cain

iTrader: (294)

how has durability been with that fan and how does it compare to say the maclan and wtf fans? Been looking at the aluminum version of this fan...

Matt Trimmings

iTrader: (170)

FYI...Maclan is a WTF fan.

urnotevenwrg2

iTrader: (1)

My Yeah Racing aluminum fans are over a year old, and they still work well. Maybe just a little more noise, but they haven't lost any blades or stopped working. Best fans out right now IMO.