Quark 125b thermaling

[BrianG]

I agree: to each his/her own.

BTW: A bright "power on" LED works as effectively, requires less current, less space, and is not mechanical. ;)

[no mods]

so what was the verdict? did you ever completely rid your thermaling issue? i have the same problem. i just wish i didn't have to void my warentee to pick up quarks slack so to speak. i run mikes heat sink with everything but fans and i still only get about 5-7 min befor play time is ovr

[wallot]

My quark has the thermal epoxy mod, sits on artic silencer heatsink and has two 470uF caps (going to add 2 more). my truck is quite heavy with big joes - 6.5kg (or 5.5 in race mode) and had no thermal issues whole saturday after being quite hard on it

http://www.radeks.net/temp/cap1.jpg

[BrianG]

I agree; you shouldn't have to mod any ESC. But, the sad truth is that you really need to if you are using it to its full potential. Certainly not the ideal situation, but we don't live in an ideal world.

[zeropointbug]

Well, in a moderate setup, even doing the internal mod to the Quark is the biggest difference you can make on your controller for temperature. But if you are like me, you will put another heatsink to it.

BrianG: I think the Quark is a lot more than 90% efficient :eek: If that were the case, it would be a little puddle of sadness. :005: It must be 96+%.

[BrianG]

lol, some of the recent ones are "puddles of sadness". OK then, at 96%, that's still 110w on the ESC - still a lot IMO. The real efficiency is variable and depends on switching speed and if it is running partial load (more PWM cycles since it's not full speed), and no one will run 2750W constant.

[smhertzog]

I went a little different route and used aluminum angle and heat heat shrink instead of the poorly designed case. Temps on the aluminum never got over 105 f ,this is with a 9.25lb crt geared 16\46 with a neu motor and 87 f outside. The motor got up to 179 f. It then blew a cap so I guess I'll have to try the add a cap thing and see how it holds up.
Two things I noticed about the Quark:
1. It seems to run the motor timing very advanced and tends to make the motor hot. There should be an adjustment like on the MM. It makes the car noticeably faster but the added heat isn't worth the trade off.
2. It also cogged a little off the line, about the same as my MM with a 2 pole 8xl. I've heard people say their Quark neu combo doesn't cog at all so maybe I got a bad one from the factory?