Very Hot Wires on the 1717? or is that normal
 

so i got the muggy up and running this weekend and its a monster, I'm only getting about 20min of run time on my 5200mah 30c and the fan is running on the monster non stop so i have some questions

160 seams very hot for motor wires isn't?

the motor and lipo was around 110 if forgot to check the MMM but it didnt thermal so im guessing it was fine on temp. i stopped with 25% remaining in the pack because performance was dropping off and i though i was getting close to LVC.

when i pulled the pack it was alittle soft and i had though it may have puffed but after cooling and recharging it was firm again.

so is 5200mah 30c not enuff?

alittle more info if it helps

the muggy weighs 12.8lbs
it is geared for 50mph:whistle: (that may be the source of my problems right there)
i am useing an external BEC
nothing is binding, i just went overeverything when i got the muggy from linc and then i went over it all again after i ran it

MMM settings
high start power,timeing is at low,

I would lower the gearing towards 40. 40 is fast when you have something that big and heavy.

What voltage are you running?

Also, what connectors are you using everywhere? Stock 6.5mm on the 1717 I suspect?

I use low start power on the MMM. I don't think this will affect the outcome much but just a suggestion.

I had my 1717 in the 130*range this weekend, it did not have any of these symptoms.

TRC 4s 8000 15c (around 35mph) & 6s 4000 35c (around 45mph).12-13lb truck, High start power, 0 punch, 30% brake, 10* of time.

I've have been watching the mmm fan for an idea of esc load. How fast does the fan come on after starting the run? How long does it(fan) take to shut off when resting.

Check your back spacer/washer on your new rotor install(shaft play). Did it fall off the shaft into the motor when installing?(I'm guilty of this one.)

I believe the fan comes on at 150*F..

Yeah methinks too,
or how fast did it get to 150*F.

It's a way for me to guestimate load, without trying shoot a surface temp on a plastic box(mmm).

my fan was running after about 2min

im useing 6.5mm bullets for everything

i cant gear down, i have one pinion because they are $31 each at kershaw for 6mm, i havent receved a new 5mm rotor and i looks like it may be months befor castle has more (i got skipped and im not to happy about that) to be honest i will never buy another pinion from dan, this one is showing ware allready and there is no way its hardened.

so i guess its not runable again? :diablo:

What voltage are you running? If 4s then 50mph is way too much as you know.

yep 6.4mm

I'm running 5cell 18.5v

my next chance to take it out will be wensday, i will change the start power and see if it helps anything, I'm also going to shorten the motor wires about 1 inch, thats about the max i can remove without worrying about them rubbing the rear brace.

most of my running was done in very short mostly dead very dry grass in a park

Cool, let us know how it goes.

I dont quite understand why you say you got skipped- you did see this message I presume:

I believe several guys who had the 6mm rotor originally complained via email & were told to hang-tight, and those were the 6 guys on 'the list' who got notifications & were sent the new 5mm rotors. If you didnt contact Castle after receiving the 6mm rotor by mistake initially or you did but didnt get the notification email, or didnt contact them when that message ( quote ) was posted, then perhaps you should do so before the limited spares are all handed out, otherwise you will end up having to wait months for a new rotor... :neutral:

i called and got on the list with Christie, there were two lists, hers an Thomas
he didn't know about hers and she didn't know the rotors came in or that he sent them out. i didn't really want to get into the details, they are doing their best to make everything right with us 1717 owners and it was just an over site.

5S for 50mph and a 12 lbs truck !!!! high top speed = high power
power = amp x volts ====> low voltage = high amps for high power.

You are draining probably way too much amps during acceleration. The motor is big so it dont heat up easily, but your ESC and wires can heat up fast with high current.
==> Try with 6S and gear down. The defaut setting of start power is low, why you put it at high ? Avoid start cogging ? Oups you can't gear down. Buy a 1520 1Y ^^

@ Semi Pro, ah, fair enough- women and their 'to-do' lists :lol:

Ditto what nuz69 said- 5s, with a 1580kv motor in a 12lb truck, geared for 50mph is too much- little wonder the motor is pulling tonnes of current and heating up the esc and wires really quickly, with poor runtime. 6s and gear for 40-45mph should give much better results.

alittle good news, i got an email today and castle is sending me a 5mm rotor so i will be able to gear down:yipi:

now if only i could get that 6cell from hobbyking i paid for 3 months ago lol

3 months !! ^^ here in Europe We wait 2-3 weeks max :yipi: but we wait 7 days to get a Mamba Monster :whip:

Why can you only gear this monster for 45mph? I thought with more power we would beable to gear this thing up higher than the smaller motors.

You can gear it for 45 mhp easily with 6S Lipo. The problem here is that it was 5S for more than 50mph with a heavy truck. The motor has no problem to handle that, but it was too much for the ESC and wires.
At the end of the day, you need power for accelerate your truck from 0 to 50mph, and if it is heavy and if you voltage is low, you need high current. The smaller motor cant handle this without heating, but in this case its the ESC which cant handle it ^^
Power = Volt * amp To reduce amp you need more volt and gear down for same top speed.

its a paid backorder, they don't have any large 6 cell packs in stock and they haven't for some time

That kinda sucks on the lipo backorder issue- have you concidered getting a refund & looking at other similar lipos/ elsewhere?

im alittle concerend about trying, have you ever tried hobbykings support line its pretty bad. and i dont know of any other company that sells a 40c 6cell over 5000mah for under $100

I see! I was having a bad day when I posted that. So since he was running less volts and geared higher the system was pulling to much current. Thats why I am going with a 6s pack, I wanted higher voltage so the AMPs wouldnt go sky high because I knew this motor would call for it.

OP how are you geared for 50mph? I punched in some numbers and something is not adding up if you are running 5s or I put something in wrong.

here is my setup

Differential Ratio: 4.090909090909091 muggy diffs
Transmission Ratio: 1
Other Ratio: 1
Spur Tooth Count: 46 kyosho spur
Pinion Tooth Count: 19 Kershaw
Total Voltage: 17.5 that is holding 3.5v per pack under load
Motor KV: 1580 castle 1717
Tire Diameter (inches): 5.84 proline Badlands on maximizer beadlocks
Tire Ballooning (inches): 0.1 tires are taped and wraped so im not getting much if any balloning
Motor Current Draw: 0
Motor Coil Resistance: 0
Spur/Pinion Ratio: 2.42 : 1
Total Ratio: 9.90431 : 1
Tire Circumference (inches): 18.98 inches (481.97 mm)
Rollout: 1.92:1
Total Motor Speed: 27650 RPM
Vehicle Speed: 50.16 mph (80.58 km/h) holding 3.5v 53.03 mph if it could hold 3.7
Effective KV Value: 1580
KT constant: 0.86 oz-in/A

i hope that helps