Technical question about voltage and capacity
I do not know much about electricty and electronics; but,
aren't there componants which alow you to increase voltage, coils or transformers?
In circuit design can't you trade 7 volts/30 amps/8 minutes for say for say 8.5 volts/30 amps/ 6 minutes.
If this is the case you would think that since 3800mah have more capacity or more total amp/hours tan you need for stock racing, you could put a componant in the circuit which would give you more voltage.
The total power out put of the cell is governed by the cell itself. By increasing the voltage, but not lowering the amperage draw, you are asking of more total power from the battery, an expression of Watts.
Volts * Amps=Watts.
Your first example: 7 * 30 = 210 watts. Thats reasonable
Second example 8.5 * 30 = 255 watts.
255 watts doesn't sound too bad, but the battery itself can't produce 8.5 volts, therefore inorder to reach the 255 desired watts the amp draw on the battery must increase.
Thus: 255watts / 7volts = 36.4 amps.
Now we are starting to tax the battery pretty hard.
Furthermore. It is not possible to convert DC current UP in voltage without some sophisticated circuitry. The current must be converted to AC (alternating current) so it can be bumped in a transformer, then must run through a full wave bridge rectifier in order to convert back to DC. At the types of current load being run here, the circuitry would have to be so large, that it probably would not fit in the RC car, even so, the added weight would more than eliminate any performance gain from the added Voltage.
NOT ONLY THAT, the circuitry would not be even close to 100% efficient, so alot of energy would be lost in the coversion process.