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Old 09-07-2007, 09:35 PM   #1
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Default Sintered Rotor?

Finally mine arrived today.. installed it and first thing I noticed my car felt a bit more smoother, it had more torque and it felt alot SLOWER I have to add 2more tooth to get it as fast as before. I also used a tach how much rpm (from the tires) Im getting before and after. Bonded 5850 rpm, Sintered 4600 tops.

I hope Im wrong and didnt waste $$ on a ceramic bearings and Sintered for my LRP
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Old 09-07-2007, 10:03 PM   #2
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Finally mine arrived today.. installed it and first thing I noticed my car felt a bit more smoother, it had more torque and it felt alot SLOWER I have to add 2more tooth to get it as fast as before. I also used a tach how much rpm (from the tires) Im getting before and after. Bonded 5850 rpm, Sintered 4600 tops.

I hope Im wrong and didnt waste $$ on a ceramic bearings and Sintered for my LRP
Thats a good idea, was it a bicycle tach.?
When you tested the sintered was that geared up.?
Or geared the same as the bonded.?
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Old 09-07-2007, 10:05 PM   #3
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When I went from the bonded roter to the sintered rotor in my Novak motor I had to gear up as well. So you are not alone. The trade off, if I am not mistaken, is what you experienced and a lower operating temperature. I could be wrong though but pretty sure I am not.
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Old 09-07-2007, 10:11 PM   #4
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stronger magnet, more torque, gear up. Yes, it will feel slower with the same gearing. Go up 2 or 3 teeth woo hoo
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Old 09-08-2007, 12:08 AM   #5
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The sintered rotor will produce fewer unloaded RPMs than the bonded rotor. However, it's got tons more torque, and will be faster overall when geared properly. Two teeth probably isn't enough, especially with how thick LRP's sintered rotor is. Keep gearing up until the motor comes off around 160 degrees after a 5 minute race, then you might be close.

You didn't waste money, the sintered rotor is better in every possible way. It's just different, and requires a lot more gear.
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Old 09-08-2007, 12:50 AM   #6
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Would the same thinking apply with Novaks 13mm rotor vs. their Sintered one?
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Old 09-08-2007, 12:54 AM   #7
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Would the same thinking apply with Novaks 13mm rotor vs. their Sintered one?
Yup. Bigger rotor = smaller air gap = more torque. Gear it up. :-)
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Old 09-08-2007, 01:14 AM   #8
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Thanks Syndrome
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