Quad Magnet motors, Do they just run hot?
#1
Quad Magnet motors, Do they just run hot?
Without going into tons of detail, I run the stock class with my BK2 at the local track. I typically run a Monster Stock Pro, with 18 or 17 pinion and a 84 spur. The Monster stock pro does a great job. I bought a BRCA Monster stock the other day, along with an EPIC Binary stock, ( both are a quad magnet design) and both motors get hotter than hell with the exact same gearing. Is this just the nature of the motors? Or, do I have to readjust my gearing??
Thanks in advance for your responses
Schlep
Thanks in advance for your responses
Schlep
#2
Suspended
you have to gear down at least 1 tooth for the quad mag. quad mags give less torque
#4
Tech Addict
there 2 different motors which mean they have different powerbands
#5
Originally posted by craziracer
there 2 different motors which mean they have different powerbands
there 2 different motors which mean they have different powerbands
I toyed around with 1 up and 1 down, and it was still hot. hotter than usual. The shop owner said that it was the nature of the 4 magnet motors to run hotter. That just didnt set well with me. My PT 13x2 is a quad mag, but I dont ever remember it getting this hot.
#6
Suspended
put in some of the new triity brushes and a red on the - and a purple on the + (yes i do mean the 15 dollar ones they last like 20 times longer and dont dicolor. they also dont fade in the run like 767's or any other brush that i have ever run before
#7
Tech Elite
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this problem is very clear-cut. your motor gets hot for one of two reasons:
your gearing is too tall, or your connectors suck. if you're still running bullet connectors and a tamiya plug on your battery, you might as well throw them in the garbage.
my bet is that your gearing is way too tall. go down a few teeth on the pinion.
your gearing is too tall, or your connectors suck. if you're still running bullet connectors and a tamiya plug on your battery, you might as well throw them in the garbage.
my bet is that your gearing is way too tall. go down a few teeth on the pinion.
#9
Originally posted by T-BirdJunkie
this problem is very clear-cut. your motor gets hot for one of two reasons:
your gearing is too tall, or your connectors suck. if you're still running bullet connectors and a tamiya plug on your battery, you might as well throw them in the garbage.
my bet is that your gearing is way too tall. go down a few teeth on the pinion.
this problem is very clear-cut. your motor gets hot for one of two reasons:
your gearing is too tall, or your connectors suck. if you're still running bullet connectors and a tamiya plug on your battery, you might as well throw them in the garbage.
my bet is that your gearing is way too tall. go down a few teeth on the pinion.
#10
Tech Addict
iTrader: (5)
By chance do you know what ratio the BK2 transmission is?
I know my B4 is a 2:60:1 and I run a 18/81 and it is not hot. I would like to compare the final drives ratio's to see how close we are.
BTW, he did not says Dean's suck, he was stating if you had the "stock" connectors you should change them.
I know my B4 is a 2:60:1 and I run a 18/81 and it is not hot. I would like to compare the final drives ratio's to see how close we are.
BTW, he did not says Dean's suck, he was stating if you had the "stock" connectors you should change them.
#11
BK2 Tranny Ratio
The ratio is 2.56
Spur Gear/Pinion Gear ---> 2.56 x External Ratio = Final
I can't say for sure, but I have been doing some research on 2 vs 4 magnet motors. From what I have read is that the Quads are higher RPM based motors, and the twins offer more torque. It appears that the manufactures structure there gearing charts to restrict the motors from exceeding the max RPM's, and avoid heating issues, which you state you are running into. I believe if you run the same ratio you are just hitting the RPM limit sooner, and thats why posts offer that you gear it down to avoid the high heat issues. I am no pro, but I think I am getting it???? But don't shoot me if I am wrong. I am building a 415MS, and have been doing alot of motor research. Been running brushless since I started.
Spur Gear/Pinion Gear ---> 2.56 x External Ratio = Final
I can't say for sure, but I have been doing some research on 2 vs 4 magnet motors. From what I have read is that the Quads are higher RPM based motors, and the twins offer more torque. It appears that the manufactures structure there gearing charts to restrict the motors from exceeding the max RPM's, and avoid heating issues, which you state you are running into. I believe if you run the same ratio you are just hitting the RPM limit sooner, and thats why posts offer that you gear it down to avoid the high heat issues. I am no pro, but I think I am getting it???? But don't shoot me if I am wrong. I am building a 415MS, and have been doing alot of motor research. Been running brushless since I started.
#12
Tech Rookie
Re: Quad Magnet motors, Do they just run hot?
[QUOTE]Originally posted by schleprock3
[B]Without going into tons of detail, I run the stock class with my BK2 at the local track. I typically run a Monster Stock Pro, with 18 or 17 pinion and a 84 spur. The Monster stock pro does a great job. I bought a BRCA Monster stock the other day, along with an EPIC Binary stock, ( both are a quad magnet design) and both motors get hotter than hell with the exact same gearing. Is this just the nature of the motors? Or, do I have to readjust my gearing??
Thanks in advance for your responses
Schlep
With your pinion / spur combo, you are most likely reaching max RPM's too fast which would cause the motor to overheat. I run my BK2 in stock with a Race prep motot geared at 21/78. At the end of a 5 min. round it's only about 140 degrees measured as close to the com as I can get with a temp gun. I would try going back to the stock 78 tooth spur and a 19 pinion and tweak it from there.
[B]Without going into tons of detail, I run the stock class with my BK2 at the local track. I typically run a Monster Stock Pro, with 18 or 17 pinion and a 84 spur. The Monster stock pro does a great job. I bought a BRCA Monster stock the other day, along with an EPIC Binary stock, ( both are a quad magnet design) and both motors get hotter than hell with the exact same gearing. Is this just the nature of the motors? Or, do I have to readjust my gearing??
Thanks in advance for your responses
Schlep
With your pinion / spur combo, you are most likely reaching max RPM's too fast which would cause the motor to overheat. I run my BK2 in stock with a Race prep motot geared at 21/78. At the end of a 5 min. round it's only about 140 degrees measured as close to the com as I can get with a temp gun. I would try going back to the stock 78 tooth spur and a 19 pinion and tweak it from there.
#13
Thanks guys.