Truggy almost there!

[brushlessboy16]

hey what runtimes do you get with that pack, how many amps?
i need ideas for my e-raze project. is it true that you need at least 100a to run a 9xl or brushless motor?

Originally Posted by brushlessboy16

hey what runtimes do you get with that pack, how many amps?
i need ideas for my e-raze project. is it true that you need at least 100a to run a 9xl or brushless motor?

It's a 3700 and the only time I ever tested the voltage cutoff on the Quark, which was set @ 3v per cell, was @ the track under race conditions and it went 10 minutes and 7 seconds geared 13/48 with a p.o.s. XLT4 motor. I would imagine it will probably go a minute or two longer with the Neu motor. I use 1800-2300mah in a five minute qualifier depending on track conditions(and who I'm racing with). As far a 9xl goes, I have no idea.

[suicideneil]

Originally Posted by brushlessboy16

is it true that you need at least 100a to run a 9xl or brushless motor?

Not really. The 9xl has a fairly low kv rating which means you would run it on a higher voltage, say 5 or 6s lipo. The result is that the motor makes its 'power' through voltage rather than pulling a higher current (amp draw). This means it may draw a higher current under hard excelleration/braking, but under normal driving and full-throttle it will draw a much lower current. Any good lipo with about 4000mah or so/more and a 20-25c rating should be perfectly fine. Its the 7/8xl motors that tend to be more demanding of the esc and battery (higher kv rating and lower voltage means higher current draw & resulting heat). Hope that makes sense.