4s vs 5s
 

Does anyone know what the different affects are(besides speed) if I use a 4s 5000mah 30c at 100% throttle vs a 5s 5000mah 30c at 70%? Will the 5s get more run time due to the fact that I'm not using it at 100%? Will it cause any more or less strain on the esc and motor?

Thanx

Higher voltage will reduce amp draw in your case because you are limiting the top speed to the same as 4s as long as your not pumping the throttle like the nitro guys do... As you have it you should get longer run times and slightly lower temps, but longer run times will be more noticable than the reduced heat/stress.

At the same power output, a 5s pack would push slightly less amperage.


Higher voltage geared for the same speed would usually result in cooler temperatures in your components

5s will run cooler, and will draw approx 1/5 less of the amps of the 4s setup if both are geared for the same top speed. In my experience 5s is a noticeable gain in power and runtime, with not much extra weight. As far as running 70% expo, just regear for the same top speed, escs run cooler at full throttle than partial.

That's basically it. The only other thing I would add is to watch motor RPMs. If the motor is already spinning fast (>35-40k) on 4s, 5s will just be faster. Not only is excessive motor rpm potentially less efficient, but you might not be able to gear low enough depending on the spur/pinion options you have.

So basically, your choices are to gear down for the same speed, or get a lower motor kv and gear the same.