chris72983

iTrader: (3)

How do you tell if a Novak 13.5 Motor has a sintered rotor, or not

Steve Weiss

The Pro versions of the 13.5 that come with sintered rotors installed come from the factory with ribbed endbells front and back and also an orange timing ring for easy identification.

The older version with smooth endbells and black timing ring came with the bonded rotor.

You can open up the front side of the motor and look at the rotor as well.

The bonded rotor will be a matte black finish.

The sintered rotor has a nickel-plated almost chrome looking finish.

James35

iTrader: (1)

Here is a picture of the new 13.5 Pro version with the sintered rotor:
http://www.rctech.net/forum/showthread.php?t=153984

exint2

is there an outright performance advantage or just a different power delivery?

chris72983

iTrader: (3)

I have bought one of the older ones and wondered if it had been upgraded by its previous owner. But after taking the cap off the end I see that it has the black rotor. Is the older motor worth upgrading? Are there any advantages to doing this?

Thanks, Chris

UN4RACING

iTrader: (22)

Its worth doing. You may have a faster one than one of the new ones.
At 30.00 its worth it.
The advantage will be on the track. The sintered rotor is wickid fast.
Gear it up.
Those rotors just about last forever.

chris72983

iTrader: (3)

Does anyone one know which part number rotor is used to upgrade older 13.5 motors?

ShaunMac

#5908 - Novak Sintered Rotor -

UN4RACING

iTrader: (22)

#5923 Is the end bell and the rotor, do you know if you have the small bearing or the large bearing in your current motor?
#5908 is the rotor alone. If your motor has the large up graded end bell this is all you need.

http://www.shopatron.com/product/pro...=NOV5908/135.0

Still Bill

iTrader: (16)

Has anyone found reason to replace the smaller bearing way inside the can? Seems like it should be pretty clean that far inboard. Can I clean and lube it by removing the three screws that hold down the plastic cap on that end?

UN4RACING

iTrader: (22)

Three screws and there it is.
You can pull it and clean the grease out and put a thinner bearing oil in it.
I did that to almost all of my brushless motors. Both bearings.
And according to Novak just blow the can out with air and put it back together.
Its recommended by Novak do not spray the can with motor spray.

Still Bill

iTrader: (16)

Thanks!

UN4RACING

iTrader: (22)

Your welcome.
I bought an up graded end bell when they first came out and it came with a small bearing as well as the end bell with the large one, and I just put it in the pit box. I would guess a 13.5 will never wear it out if you leave the heavy grease in it?
Modified motors may wear it out though?

FUJIMO

iTrader: (63)

OUR LOCAL TRACK STARTED RUNNING THESE LATE LAST YEAR WITH AVG. TIMES ( 4.6, 4.7 ) RUNNING A LITTLE ABOVE A 21 TURN WITH 3800 mAh BATTERIES ON A 250 FT. RUN LINE CONCRETE OVAL. AND THAT WAS BEFORE THE SINTERED ROTOR AND 4200 WERE CONSIDERED "LEGAL" AT OUR TRACK.

LAST WEEKEND A FELLOW RACER WAS TURNING 4.4 LAPS WITH A 13.5 THAT HAD THE SINTERED UPGRADE AND 4200 mAh BATTERIES. NONE OF US THOUGHT THE ROTOR WOULD MAKE THAT MUCH OF A DIFFERENCE BUT I ADMIT I WAS VERY IMPRESSED. AMAZING WHAT A DIFFERENCE A LITTLE CHROME LOOKING ROTOR CAN MAKE .

I ADDED THE SINTERED TO MY OLD CAN 13.5 AND ALSO THREW IN THE CERAMIC BEARINGS THAT THEY OFFER FOR THE MOTOR. I CAN TELL A DIFFERENCE IN THE WAY IT TURNS IN FREE SPIN BUT HAVEN'T HAD A CHANCE TO TEST IT OUT ON THE TRACK. I WOULD SAY THE DIFFERENCE AS FAR AS THE BEARINGS WILL BE VERY MINIMAL BUT I HAD THE EXTRA $10 TO BLOW

MARCEL

Still Bill

iTrader: (16)

Same here. That's pretty much why I was concerned about its wearability.