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Old Feb 03, 2011, 03:13 AM
Registered User
New Westminster, B.C., Canada
Joined Apr 2010
76 Posts
Question
A Brushless system for HPI Sprint 2 Sport?

Hi!

Q#1.Is this a decent BL system for HPI Sprint 2 Sport(http://www.hpiracing.com/kitinfo/708/) or too low quality? If it is not good enough, any BL system recommendation, please (If it is around $100, it will be ok.)

Here is the link fo the BL system.http://www.hobbypartz.com/26p-blcomb...9r-4370kv.html

Because the battery compartment of HPI Sprint 2 Sport only accepts 2-cell li-po in terms of the size, I am planning to use a 2 cell li-po 40C 5,000 mAh.

Q#2. For this battery, is the higher KV (4370KV) better or the lower KV (3000 KV) better? Or something between better?

Q#3. Could anyone give me an explanation about the relationship between "KV rate" & "the cell numbers of Li-Po", please?

Q#4. At this moment, I am using 2-cell li-po 20-30C 5000 mAh for my brushed HPI Sprint 2 Sport. Does it kill the brushed motor or not?

Thank you very much for your attention!
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Last edited by James K.G.; Feb 03, 2011 at 03:20 AM.
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Old Feb 03, 2011, 05:24 AM
Nice day for RC'ing
Redfisher's Avatar
Palmerston On. Canada
Joined Jul 2010
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I would go with a higher KV motor for the onroad car if all you can run is 2s, Like 6000kv or more.
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Old Feb 03, 2011, 08:08 AM
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iamahuman's Avatar
india
Joined May 2010
486 Posts
Q#4:The brushed motor will die on its own.The battery supplies just how much power the motor needs.

Does your brushed ESC have a lipo LVC?
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Old Feb 03, 2011, 08:10 AM
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india
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http://www.rcuniverse.com/forum/m_87...tm.htm#8705858
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Old Feb 03, 2011, 11:32 AM
Registered User
New Westminster, B.C., Canada
Joined Apr 2010
76 Posts
Thank you very much for your responses!

There is no li-po lvc in the stock ESC, but I always check the voltage with a li-po voltage meter while running, so that I don't kill the li-pos

Any comments on the Leopard BL system? It is cheap, but I am wondering about the quality. But I should find out a higher kv BL system.

Your advices will be appreciated again! Thank you!
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Old Feb 03, 2011, 11:14 PM
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india
Joined May 2010
486 Posts
I've not heard much about the leopard system.The EZrun combos are said to be good.Just make sure you get ones with turns like 13.5,6.5 and so on.It should end in '.5'.
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