Amps with a MMM 2200kv combo?

[Serum]

perhaps your batteries simple don't deliver more power to begin with.

They have got their limits. The measurements as made by Mike are done with an eagletree as well, so i guess he uses better batteries.. :)

You could contact either MGM or eagletree about this difference. What resolution are you using to record on your eagltree? Perhaps the MGM is more sensitive, since it records larger currents. Or it's completely off..

If your 1y is turning at the right KV, it would make sense if your 8XL isn't an 8XL.? the KV of the neu is higher, it has got more torque, yet the 8XL feels/is more powerful according to your statements. I can't find a logical reason for this.

just throw your eagletree in the 8XL vehicle and you'll see what is going on?

[BP-Revo]

I thought I'd jump in and note that in my experience, bashing seems to draw more amps than racing and is harder on the setup. It really does depend on the driving though.

However, for me, while racing I am very smooth with the throttle, rolling on and such and always trying to put the power to the ground and not let any go to waste (wheel spin).

When bashing, I'll punch it just because I can and just because if the truck wheelies/flips or spins out it doesn't really matter. And for that, I get like 10 minutes bashing now while I get a good 15+ on the track.

[SpEEdyBL]

Maybe the 8xl rotor demagged. This will raise the rpm, amp draw and the temperatures considerably. I don't know what temps you are getting, but if your motor is overheating uncontrollably, a demagged rotor is likely the case.

[Just go Play]

My batteries do not hold voltage as well as they should but still manage about 3.3vps @ 170A with normal temps... even so would that effect the current the motor required?

As for the 8xl it is the correct kv and has what I consider to be normal temps of 150f but it will pull 170A peaks which is more then my 1Y pulls.

I guess I'll have to borrow an amp meter so I can try to verify if I'm getting accurate readings from the eagletree and the MGM.

Originally Posted by Just go Play

My batteries do not hold voltage as well as they should but still manage about 3.3vps @ 170A with normal temps... even so would that effect the current the motor required?

As for the 8xl it is the correct kv and has what I consider to be normal temps of 150f but it will pull 170A peaks which is more then my 1Y pulls.

I guess I'll have to borrow an amp meter so I can try to verify if I'm getting accurate readings from the eagletree and the MGM.

I dont know how the winds of the 2 motors compare to each oth
er but it is possible that there is fewer winds in the 8XL thus drawing more ampage

[Serum]

3.3volts per cell on 170A, these cells are VERY good. never heard these high numbers before, what cells are you using?

on 5S, that's 3000 watts. that's incredible.

[sleebus.jones]

Originally Posted by DrKnow65

70-80 amps continuous is where the bar is set, anyone else? Peaks?

On 6S, a little birdie confirmed the very same numbers to me. This is really great news, as it means a 6S1P A123 setup will be just about perfect for it. It might push the cells a bit, but still are in their range. This also means you don't have to have huge monster lipos to drive it. It seems we are getting back to selecting for runtime, rather than current capability in terms of MAh.

This also means that a 6S1P A123 setup in a 1/8th scale buggy will just about put the MMM at its full potential. That will be a nice, light setup, which would just kill on the track. I've got my 6S flat pack already made up :)

Sleeb

[Just go Play]

Originally Posted by Serum

3.3volts per cell on 170A, these cells are VERY good. never heard these high numbers before, what cells are you using?

on 5S, that's 3000 watts. that's incredible.

My apologies Serum those numbers are wrong and I wish they were that high.

The correct figures are 3.3vpc @ 120A and 3.05vpc @ 170A.

The packs used are a FP 5s 25c 5Ah and a pair of TP 2s 25c 4.9Ah bricks. The cells perform with in 10% across all packs with the TP bricks consistently averaging slightly lower consistently then the 5s pack. I say that the numbers are low since FP claims their cells hold 3.6v at a 25c discharge rate (which is somewhat optimistic I'm sure).