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Old 12-06-2010 | 05:31 PM
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Default Battery C rating question

I am looking to upgrade my 7.4 v lipo from a turnigy 20c 5000 mh to either an thunder power 60c or a max amps 150c
My question is will the higher c rating make a large change in power?

I race 17.5 stock short course and the boost in power could make a big difference.

Also does any know what 17.5 brushless motor works with the smart sense function.

thanks for the input.
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Old 12-06-2010 | 05:50 PM
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Well, your 20c 5000mAh is prividing 100A as long as your motor isnt pulling more than 100A then you wont see any difference. Say your ESC is rated at 70A and motor at 60A and your lipos you have now are providing more than enough needed to run the motor to it capabilities. Now if you had a MMM 2200kv thats rated 120A as the ESC is rated 120A aswell then the higher "C" rating, lets say...30c 5000mAh would provide you more than 100A and the motor will take more than 100A and run harder. Do you know what Im sayin? There is a formula to find the amps(its like c rating divided my mAh rating, or something like that)
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Old 12-06-2010 | 05:57 PM
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Yes you will see a difference, especially with the Thunder Power.

More to it than just maximum amp draw. Higher C capable batteries essentially must have a lower internal resistance to avoid burning up under high discharge rates. This equates to higher voltage under load, even moderate loads. (or less voltage sag if you will)

Thus significantly more punch, and a touch more top end. Very easy to demonstrate.

Batteries are more important in Stock oddly enough, mod can always motor up.
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Old 12-06-2010 | 06:06 PM
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Originally Posted by Dave H
Yes you will see a difference, especially with the Thunder Power.

More to it than just maximum amp draw. Higher C capable batteries essentially must have a lower internal resistance to avoid burning up under high discharge rates. This equates to higher voltage under load, even moderate loads. (or less voltage sag if you will)

Thus significantly more punch, and a touch more top end. Very easy to demonstrate.

Batteries are more important in Stock oddly enough, mod can always motor up.
That makes sense as well. Theres less resistance and the pack can easily provide the power the system is pulling from it. Correct?
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Old 12-06-2010 | 06:06 PM
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Originally Posted by Dave H
Yes you will see a difference, especially with the Thunder Power.

More to it than just maximum amp draw. Higher C capable batteries essentially must have a lower internal resistance to avoid burning up under high discharge rates. This equates to higher voltage under load, even moderate loads. (or less voltage sag if you will)

Thus significantly more punch, and a touch more top end. Very easy to demonstrate.

Batteries are more important in Stock oddly enough, mod can always motor up.
Are you saying thunder power is better than max amps?

Yeah it is true that in stock class batteries do mean alot.

Also, hobby partz has 35c 2 cell lipos for $35 ea.
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Old 12-06-2010 | 06:56 PM
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Originally Posted by RCaddict0
That makes sense as well. Theres less resistance and the pack can easily provide the power the system is pulling from it. Correct?
Essentially yes.

Nit picking pet peeve semantics perhaps, but the load doesn’t pull from the battery, the battery voltage does indeed drive the load. A higher voltage drives harder, pushes more current. And it’s a squared function from voltage to power so apparently small voltage differences can be fairly significant in terms of power.

Originally Posted by corr915
Are you saying thunder power is better than max amps?

Yeah it is true that in stock class batteries do mean alot.

Also, hobby partz has 35c 2 cell lipos for $35 ea.
Yes, based on everything I have seen both in bench testing and on the race track, TP clearly provides better performance than MA. Both have solid support reps.

There are many other batteries that approach, perhaps even match the TP for performance, but none have been proven to actually be better that I am aware of. Not claiming perfection, they can be messed up just like any lipo though. Note I don’t own any TP, just my observations and research.

Some will disagree, that’s natural. Most all newer lipos are incredible batteries compared to what we had before!
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Old 12-07-2010 | 11:50 AM
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Any more thoughts on what motor will work with mamba max pro and smart sense.
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