Medusa 36-50-3300 Vs. Ammo 36-50-3300

Well dropping the timing did help with temps slightly the Ammo is still running way hot! 2.5 min of running and the temp peaked higher than the Medusa after 8 min of bashing around in warmer weather.

Done with the Ammo in this App. I have a small boat I might try it in with water cooling??

I'll try some steeper gears with the Medusa also, looking at the graphs I see very few points over 75 amps. I also want to try increasing the timing slightly with the Medusa, I found in the literature that came with my motor an 8-15 degree timing reccomendation.

I kind of like the punch the Ammo has, the Medusa seems to be smoother, easier to control the power. The punchyness keeps you on your toes becuase you never know for sure if it's gonna slip out from under itself, so somewhere in between the two would probably be my ideal.

I just spent the last few hours putting the Medusa back in and doing some quick runs in the yard just to see what kind of peaks I could pull on taller gear ratios. Started with a 15/68, pulled about 80amps. Went to a 15/62 and pulled 91a. I figured what the hey and tried 19/68 and pulled 106a and it still dosent have that kick the Ammo does.

I honestly dont need any more than I was getting with the 14/65 gears so I put it back to 15/68 and I want to run straight through a full pack, right down to the LVC to chrck for temp issues. If I can make it through a full pack with out temp issues I'll start tweaking the timing. Cold, windy, and snowing this morning:(

[lincpimp]

Originally Posted by Buzzsaw46

Well dropping the timing did help with temps slightly the Ammo is still running way hot! 2.5 min of running and the temp peaked higher than the Medusa after 8 min of bashing around in warmer weather.

Done with the Ammo in this App. I have a small boat I might try it in with water cooling??

I'll try some steeper gears with the Medusa also, looking at the graphs I see very few points over 75 amps. I also want to try increasing the timing slightly with the Medusa, I found in the literature that came with my motor an 8-15 degree timing reccomendation.

I kind of like the punch the Ammo has, the Medusa seems to be smoother, easier to control the power. The punchyness keeps you on your toes becuase you never know for sure if it's gonna slip out from under itself, so somewhere in between the two would probably be my ideal.

I just spent the last few hours putting the Medusa back in and doing some quick runs in the yard just to see what kind of peaks I could pull on taller gear ratios. Started with a 15/68, pulled about 80amps. Went to a 15/62 and pulled 91a. I figured what the hey and tried 19/68 and pulled 106a and it still dosent have that kick the Ammo does.

I honestly dont need any more than I was getting with the 14/65 gears so I put it back to 15/68 and I want to run straight through a full pack, right down to the LVC to chrck for temp issues. If I can make it through a full pack with out temp issues I'll start tweaking the timing. Cold, windy, and snowing this morning:(

Water cooling will make a huge differenc in temps. I tried a sv27 6 pole motor in a few different vehicles, and it ran too hot with just air cooling. With water cooling, pushing the sv27 at 42mph it does not even get warm. Something about having a billion gallon radiator seems to drop temps!?

[kostaktinos_mt]

hi there everyone...
i had originally registered to this forum just to post a comment on lutach`s thread, but since i registered, i thought i could chime in and drop my 0.02... :)
since i am new to this forum, i am completely unaware of each individual`s tempos,ideas,likings and such... so in case anyone already knows the stuff being typed below [or disagrees with it], please don`t take it personally...

i think your ammo is partially demagnetized. 'higher than before' rpm [as you put it] and elevated temps [low efficiency along with quite high currents] is a clear,solid indication of this... so essentially, you can say it`s not a 3300kv anymore... a round speculation about the 'revised' kv rating wouldn`t be much difficult to guess/estimate either; if that`s a question troubling you that is... so let`s just say that this isn`t a sharp head-to-head comparison between those two motors...
try contacting tower; they might get you a replacement...

as medusa motors are 4pole motors, it is necessary that the timing is set above 10degrees... the slotted stator design makes it even more necessary... if i were you, i would be running a medium to high timing setting on the MM, and would definately avoid 'low' or 'lowest' settings... 15 degrees is a mediocre setting for a 4pole motor [unless if it is high-kv compared to it`s physical size], and typical settings for the particular genre of motors usually float between 15-20degrees; meaning that even the stock '10 degrees advance' of the MM is quite low for the particular motor...

btw, 3300kv is a bit high for the emaxx imo... that poor ammo would stand a chance if it was a 36-56-2700 or even better the 1800...
*ammo motors on the other hand are rather touchy with the timing... lowest timing on MM should be considered mandatory when running an ammo...