Brushless Pro's Please Help!

[skyler]

Sorry I thought low voltage and high amp will give the best run times. Not high voltage and high amps. Could be wrong, just something I remember some years ago.

[stum]

Originally Posted by skyler

Sorry I thought low voltage and high amp will give the best run times. Not high voltage and high amps. Could be wrong, just something I remember some years ago.

14.8 to 22.2 isn't a dramatic change in voltage, but higher voltage with less amp draw results in less heat and is typically more effecient. The things you have to consider though are size of the packs and how they fit into your vehicle as well as your esc voltage limitations (not many car esc's are capable of 7s-10s operation). Funny enough in many cases a 4s 8000 config will yeild the most run time in many rc's due to battery tray limitations and where you want to be for weight. In order for a 6s lipo config to yeild longer run times than the 4s 8k you would need at least a 6s 5400mAH lipo which is pretty large but not unheard of for running.. for a 5s config to run longer than the 4s 8k setup you would need at least a 5s 6500mAH. In both cases the additional run time is marginal, but with higher voltage would create some reduction in heat. If you spend big bucks or get a deal on a car ESC capable of 10s operation a 3300mAH pack will last just a bit longer than the 4s 8k pack. (based on all options geared for the same MPH)

I'm running my 8ight Truggy w/ 5s now and almost wishing I didn't.. I got a deal on some flight power evo25 3700 packs which are nice cells but I'm only getting about 12minutes on them so they are only going to be good to run a single warm up and qualifier per pack. Thank god I have a pair of Neu 5s 4900's coming so I can keep it to just one pit in the 30+ minute a mains. I was actually surprised that the evo25 packs are only giving me 3580ish before hitting LVC, which is pretty crappy for how much they cost... I'll never buy flightpowers again.. my Elite 35c lipo's blow them away and COST LESS. Any whoo this is putting my truggies consumption at about 296mAH per minute. I'm going to recheck my times my next time at the track to be sure I didn't screw them up a bit, but it is with in a 3minute margin. I may gear down 1 tooth helping some and I am currently running some heavier proline MTR bowties and when I race I will be using the LPR's or the newer 'xxt' losi truggy tires which are really nice and light weight as well.