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        Question A Brushless system for HPI Sprint 2 Sport?

#1 James K.G. Feb 03, 2011 02:13 AM

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!

#2 Redfisher Feb 03, 2011 04:24 AM

I would go with a higher KV motor for the onroad car if all you can run is 2s, Like 6000kv or more.

#3 iamahuman Feb 03, 2011 07:08 AM

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?

#4 iamahuman Feb 03, 2011 07:10 AM

http://www.rcuniverse.com/forum/m_87...tm.htm#8705858

#5 James K.G. Feb 03, 2011 10:32 AM

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!

#6 iamahuman Feb 03, 2011 10:14 PM

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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