Recommend me a motor fan

[Three_Stacks]

Hi there, 

 

I am running an HPI WR8 Flux on 3s with a 15T pinion (standard) but the motor seems to get very hot. 

 

I have tried a 14T pinion, but didn't change much and I have checked the drivetrain and all seems to run freely, and the spacing on the spur gear is correct. 

 

Does anyone have a good recommendation for a motor fan ? 

 

I think it would need to be a single fan, but I wondered if fans work at all, thinking that they create a cool spot on the centre of the motor can, but perhaps the other side of the motor or the ends of the motor would still be just as hot ?

 

Any advice greatly appreciated ! 

[Bert_w164]

I don't know about your specific model, but what's the air flow like within the shell? 

 

If you don't have a cool source of air, you'll just circulate hot air around.

 

I had the same issue and just took a drill to my shell, it dropped my temps by 40c. Previously I had very little air flow on a 19T/4274/2200kv/6S setup...hence the crazy temps. 

Edited April 20, 2021 by Bert_w164

[Three_Stacks]

Hi Bert_w164,

 

I think you may be right about the airflow under the shell - I suppose I was hoping not to cut the shell up too much, but I will make a few flow holes and see if that help. 

 

The ESC runs pretty cool, but the motor is roasting.

 

I haven't experienced any thermal cut off, but can imagine it's doing the motor much good.

[Jumper]

The motor is fine up to 80c so it might feel pretty hot even if its within reasonable limits. 

 

I would recommend getting a small clip on heatsink and fan as a rally car isn't going to be jumped like a basher, so its unlikely to come off or break.  The air in the shell won't be anywhere near 80c so it will still cool down the motor effectively. 

[walkbythesea]

I’m a motor fan - I think they’re great

 

✌️😁