Novak Brushless - fan or no fan? and Gearing?

[jim76]

I have just placed an order for two novak brushless systems for my ZX5 and B4.
Both systems have the new sintered arms. I know that sintered have stronger brakes, slightly more power and run cooler (is that the motor or speedo as well?).

What i'm keen to know is whether i can chance running the speedo with out the fan in either 2 or 4wd? i'm guessing the 6.5 in a B4 might be ok without the fan as the load shouldn't be too great. but a 4.5 in the ZX5, unlikely? Has anyone placed the fan on it's side next to the speedo so it fits under the shell?

also does anyone have a good starting point for gearing the B4 (6.5) and ZX5 (4.5)?

many thanks

[footey]

hi jim i run a 6.5 in my x6 so based on a b4 and i run a 19/20 pinion never got really hot but i run my fan on top

[bert digler]

Originally Posted by jim76

I have just placed an order for two novak brushless systems for my ZX5 and B4.
Both systems have the new sintered arms. I know that sintered have stronger brakes, slightly more power and run cooler (is that the motor or speedo as well?).

What i'm keen to know is whether i can chance running the speedo with out the fan in either 2 or 4wd? i'm guessing the 6.5 in a B4 might be ok without the fan as the load shouldn't be too great. but a 4.5 in the ZX5, unlikely? Has anyone placed the fan on it's side next to the speedo so it fits under the shell?

also does anyone have a good starting point for gearing the B4 (6.5) and ZX5 (4.5)?

many thanks

i run a 4.5 novak in my lazer with a fan u will need new body either kl002 bullit shel or the azerashi one also gear it at 15 81 its a little quick too quick in fact pm me for any wiring help its a hand full

[bert digler]

defo run the fan it gets mega hot

[LiamD]

In your B4 try taking the washers from between the fan and heatsink, it might just fit underneath the shell without any butchering.

If it's a new sintered rotor motor, you might get away with it in your B4, wouldn't like to try that in your ZX5 though...

[bert digler]

Originally Posted by LiamD

In your B4 try taking the washers from between the fan and heatsink, it might just fit underneath the shell without any butchering.

If it's a new sintered rotor motor, you might get away with it in your B4, wouldn't like to try that in your ZX5 though...

its fast too fast beyond belief fast in fact go a speed gun in may be fastest off roader ever

[Chrislong]

Sintered runs cooler.

In the B4, I beleive the ESC would stay cool 'enough' without the fan, but if you can get a fan in there - do.

I would recommend, a 25mm fan, mounted from the side on the chassis blowing through the fins. Wired direct to 7.2v so it is blowing even before you are turned on.

6.5R is a good choice for 2wd by the way.