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Old 04-13-2007, 03:35 PM   #1
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Default Novak 13.5 Question?

How do you tell if a Novak 13.5 Motor has a sintered rotor, or not
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Old 04-13-2007, 03:41 PM   #2
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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.
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Old 04-13-2007, 05:14 PM   #3
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Here is a picture of the new 13.5 Pro version with the sintered rotor:
http://www.rctech.net/forum/showthread.php?t=153984
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Old 04-13-2007, 05:34 PM   #4
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is there an outright performance advantage or just a different power delivery?
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Old 04-13-2007, 06:46 PM   #5
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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
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Old 04-13-2007, 06:57 PM   #6
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Quote:
Originally Posted by chris72983
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
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.
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Old 04-14-2007, 05:51 PM   #7
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Does anyone one know which part number rotor is used to upgrade older 13.5 motors?
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Old 04-14-2007, 06:05 PM   #8
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Quote:
Originally Posted by chris72983
Does anyone one know which part number rotor is used to upgrade older 13.5 motors?
#5908 - Novak Sintered Rotor -
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Old 04-14-2007, 06:10 PM   #9
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#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
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Old 04-14-2007, 06:16 PM   #10
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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?
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Old 04-14-2007, 06:34 PM   #11
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Quote:
Originally Posted by Still Bill
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?
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.
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Old 04-14-2007, 06:35 PM   #12
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Quote:
Originally Posted by UN4RACING
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.
Thanks!
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Old 04-14-2007, 06:41 PM   #13
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Quote:
Originally Posted by Still Bill
Thanks!
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?
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Old 04-14-2007, 06:48 PM   #14
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Default 13.5

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
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Old 04-14-2007, 06:49 PM   #15
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Quote:
Originally Posted by UN4RACING
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?
Same here. That's pretty much why I was concerned about its wearability.
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