6s vs. 4s?

[lincpimp]

If you go from 4s to 5s, maintain the same overall gearing and run the motors at the same speed the difference is quite noticeable. 6s makes a world of difference.

I have run some heavy vehicles on 4s, and then gone to 8s setups, with half the motor kv, half the amp rated escs and crap batteries wired in series. Even then the difference was noticeable, and my 8s setup cost about half what the 4s setup did (or less). If only we had an available 60 amp 8-10s car esc from castle, I would never run anything lower than 8s..

[kingdomracer]

Right now I have Thunder Power 22c 8000mah 2x2s=4s w/1800kv MMM combo. I get close to 25-30 min. no prob but would like to run more efficient and save some weight w/5s, how do I get the same runtime from lower mah batts. Is there a formula that will calculate the needed size batts? Plus can someone help me understand how is it that with a lower mah which leads to a lower constant for most batts out there (usually right around a 100 amps constant) is a good thing? I've been lead to believe that if my MMM is rated at 120 then I should make sure my batts are at the lowest 150, I don't see that same rule applying in a 3300mah batt with a much lower constant amp rating. I thought when you buy a lipo it should be based on 80% of the motor rated amp draw. I hope I made sense and I will not take any offense If I'm confused in my thinking. Plus it would help for the guys who are running the 5s and 6s 1600kv-1800kv setups to post their runtimes. Thankz!

[stum]

Originally Posted by lincpimp

If you go from 4s to 5s, maintain the same overall gearing and run the motors at the same speed the difference is quite noticeable. 6s makes a world of difference.

I have run some heavy vehicles on 4s, and then gone to 8s setups, with half the motor kv, half the amp rated escs and crap batteries wired in series. Even then the difference was noticeable, and my 8s setup cost about half what the 4s setup did (or less). If only we had an available 60 amp 8-10s car esc from castle, I would never run anything lower than 8s..

If you maintain the gearing you will need to have additional mah on the 5s setup as it will burn mAH just as fast as the 4s setup.. the point of higher voltage is not to increase speed, in fact you must gear down to see any benifits at all - temps, runtime etc. only show if you keep the speed the same as the other setup.

Also keep in mind going to a 6s setup you pretty much rule yourself out of any 'large event' only local club level play will allow this. With that said the only way you will feel any difference as far as performance goes "smoothness or torque power" is if you have batteries or an ESC that cant handle the amp load your throwing at it on the lower voltage setup. You may shave a couple degree's off as well w/ higher voltage but with a MMM combo or tekin combo you'll never have heat issues anyway.. I even ran a Medusa 60mm 2000kv on 4s as my primary motor for a full season of racing with ZERO issues. I currently run a 1y combo geared at 13t or less (depending on track size) and use Hyperion lipo's; 5k and 5.5k packs. I also use to run a 5s 1700kv (2.5d) setup in my 8ight truggy and have since swapped back down to a 1y combo, and I run 6500mAH hyperions in this setup and I have a 9000mAH pack for 30+ minute amains. Again no issues running at all.. with both systems running the 1y it makes it easy for me to swap out motors ecs's w/o any hassle if I do run into issues (havn't yet, knock on wood).