need to go slower to go faster??

[rootar]

with a 4s pack using a motor to obtain the same power and rpm as my motor on 5s with the same power and rpm they will be the same or the 5s will have better runtime no questions asked.

we are not comparing a 4s and 5s used on the same motor but a 30,000rpm 4s setup and a 30,000rpm 5s setup.......


and i dont run an LVC a 5s pack will "dump" considerly right at about 3.3 volts percell and by the time it gets to the pits your at about 3.2

For 20 minutes you would need to jump up to a 5s 5000 pack to do it consistently. I have run 20 minutes with a 5s 4000 pack in a race, but it is on the very edge. The 1515 2.5d is more suited for a truggy. If you gear down, you are probably going to start running hot as there won't be enough load on the motor.

I would highly recommend a 1512 3d (1700kv) or the 1y (1850) kv for 5s. I pretty much just race with 5s 4000 packs since our mains here are just 15 minutes most of the time.

You only need to gear for 37-40mph.

The only way you are going to get 20 minutes consistently under race conditions (plus warm up laps) is to get the 1512 3d or the 1y and use a 5s 5000 pack. You MIGHT get it with a 5s 4350 pack, but it will be real close.

[rootar]

gearing down does not help the runtimes at all it actually shortens them cause im using more juice and full throttle punches rather than 3/4 throttle punches......

and yes at the batts limits and i dunno if id dare run them in a truggy, they arent the best batteries by a long shot but they are very good for the money and people around here are more inticed to convert some of their buggies if they can get a decent priced setup. mine runs great i have no real complaints, my temps are great, its tough as nails and i love it, but im nit picky and ive got till december and then till next year to do anything and every thing to make it as bullet proof and as good as possible.


hmm i was looking at the Hacker 14L motor specs state it as a 35 amp motor and 50 amp peak that would be ALOT of difference over my 80amp 1515....... ut somethng tells me those spec arent exactly right but can anyone chime in?

[crazyjr]

Originally Posted by rootar

gearing down does not help the runtimes at all it actually shortens them cause im using more juice and full throttle punches rather than 3/4 throttle punches......

and yes at the batts limits and i dunno if id dare run them in a truggy, they arent the best batteries by a long shot but they are very good for the money and people around here are more inticed to convert some of their buggies if they can get a decent priced setup. mine runs great i have no real complaints, my temps are great, its tough as nails and i love it, but im nit picky and ive got till december and then till next year to do anything and every thing to make it as bullet proof and as good as possible.


hmm i was looking at the Hacker 14L motor specs state it as a 35 amp motor and 50 amp peak that would be ALOT of difference over my 80amp 1515....... ut somethng tells me those spec arent exactly right but can anyone chime in?

on the first thing, yes and no. Yes, in that gearing down, you will spend more time at max RPM, but there is really not much load at max (should be at top speed) to gear up and limit the time at top speed, that should be more load. I could be wrong, but that's how i see it.

On the amps on the 14L and the neu, I think thats air load. Both are plane and heli motors first and thats how they are tested. Cars load motors a bit different, the spikes are stronger to overcome mass and friction on the ground

[rootar]

yes but a 35 amp air load compared to an 80 amp airload????? thats alot of difference. and i was told by the maker of these lipos that they would handle a big 80 amp motor, so we gave them a go.... so far so good so


im really jsut trying to find the best setup possible so when i can start doing better in the race they will start paying more attention, and ill know what kinda setup to tell them to run, and beable to use the lipos if theyd like.