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Old 09-15-2008, 06:32 AM   #1
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Default brushless help for a Losi xxx-cr(Novak XBR 10.5 any good)

I am new to electric, just switched from nitro buggy/truggy. I have a xxx-cr that I want to make brushless/lipo. I was looking at the Novak XBR 10.5 esc/motor combo, will this be a good choice, I will be club racing only and doing open practice, nothing serious. My main question, do i need a fully sensored setup like the gtb/10.5 ribbed can to have smooth throttle with no low-cogging/glitching? I am looking for controllable power with a good amount of speed. Also, what would be a good starting point for gearing for this setup^^ Also, what lipo hard case packs are worth buying besides Orions? thanks for any tips/advice guys. peace Trevor

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Old 09-15-2008, 06:54 AM   #2
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Old 09-15-2008, 07:30 AM   #3
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Last edited by pwnzor; 09-15-2008 at 07:43 AM.
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Old 09-15-2008, 08:33 AM   #4
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why is this being ignored? LOL
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Old 09-15-2008, 08:55 AM   #5
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I use a Mamba Max + 5700Kv setup. It is a sensorless system. No cogging or glitching problem. The only problem I've encountered with it is that it unveiled one of my battery packs to be really weak, but this is not an ESC problem, it is the problem with the battery not being able to supply the power that the motor was demanding.

As for your sensored question, to my knowledge the motors that are most effected by a sensorless system with cogging are the higher turn motors. I think beyond a 13.5 turn motors, the sensorless system will start to feel like it's cogging. I think so long as you stay 10.5 turn and below, you'll be fine.

I know that a lot of guys at my track were running 7.5s and 8.5s in their 2wd buggies. Also, I would check with your club to see if you guys are adhering to ROAR rules or not. Some tracks do, some tracks don't. I believe as of this writing, ROAR requires approved sensored ESCs (although the motor does not need to be sensored). If your club doesn't play by ROAR regulations, then I would highly suggest getting a Mamba Max + Motor combo.

If you do go with a Mamba, I highly suggest nothing more then a 4600Kv motor. Mine is a 5700Kv motor, and it felt like it was too much power , I had to dumb it down a bit in the settings to calm it down (like setting the timing to "low" and etc...).
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Old 09-15-2008, 09:35 AM   #6
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thanks for the reply man, I will look into the MM 4600kv system. My club is not roar sanctioned, so none of their rules apply to track. Also, how are the Losi li-po batteries? Also, how is the Sidewinder 4600kv BL system in comparison to the MM 4600 kv? I noticed the Sidewinder system is a lot cheaper.
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Old 09-15-2008, 09:52 AM   #7
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Originally Posted by pwnzor View Post
thanks for the reply man, I will look into the MM 4600kv system. My club is not roar sanctioned, so none of their rules apply to track. Also, how are the Losi li-po batteries? Also, how is the Sidewinder 4600kv BL system in comparison to the MM 4600 kv? I noticed the Sidewinder system is a lot cheaper.
Xbr is decent, I would go with the lrp sphere or a gtb. It's better just to spend alittle extra and get a better component. I reccomend a lrp sphere to you my friend. It's such a pleasure to drive with.
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Old 09-15-2008, 09:53 AM   #8
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Xbr is decent, I would go with the lrp sphere or a gtb. It's better just to spend alittle extra and get a better component. I reccomend a lrp sphere to you my friend. It's such a pleasure to drive with.
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Old 09-15-2008, 11:02 AM   #9
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not really interested in LRP, no punt intended to them or their products
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Old 09-15-2008, 12:20 PM   #10
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I like the LRP Sphere Comp edition. It so adjustable and will give you the mid range throttle control the Novak lacks. For some reason the Novaks act more like on/off, which would be alright for oval but defininately lacks for the throttle control needed for on/off road applications. I run a Novak 8.5 bl motor however. I usually gear around 19/78 to 20/82 for off road.
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Old 09-15-2008, 12:53 PM   #11
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I like the LRP Sphere Comp edition. It so adjustable and will give you the mid range throttle control the Novak lacks. For some reason the Novaks act more like on/off, which would be alright for oval but defininately lacks for the throttle control needed for on/off road applications. I run a Novak 8.5 bl motor however. I usually gear around 19/78 to 20/82 for off road.

He's not interested in the best BL esc out right now.
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Old 09-15-2008, 01:23 PM   #12
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I will look into the MM 4600kv system. Also, how is the Sidewinder 4600kv BL system in comparison to the MM 4600 kv? I noticed the Sidewinder system is a lot cheaper.
I have a MM 4600, 4000/25c Lipo in a XXXT and love it. Smooth, fast, plenty of punch. 21-23/86 gear stays under 160 on motor and 130 on ESC.

Max vs Sidewinder, SW is limited to 4600: Up to 3s LiPo 12 cell NiMH
or 5700: Up to 2s LiPo 8 cell NiMH

MM up to and including 7700: Up to 3s LiPo 12 cell NiMH

My Max has the USB port on the ESC to plug directly into PC. (tons of options)
My SW needs CastleLink, unplug esc from receiver, plug esc into Castlelink and to computer. Same options)
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Old 09-15-2008, 01:23 PM   #13
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Quote:
Originally Posted by RB FIVE View Post
Xbr is decent, I would go with the lrp sphere or a gtb. It's better just to spend alittle extra and get a better component. I reccomend a lrp sphere to you my friend. It's such a pleasure to drive with.
Speaking about GTBs, OCRC had 2 GTB caps flame out during practice Saturday.. mine included. The top of my then brand new body is melted but still useable. I replaced the cap and the s/c now studders and the heat sink rapidly gets hot to the touch with any battery.. Novak hasn't answered my tech support email yet and I'm thinking about switching to LRP or something different entirely.
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