Is there a Quark 125B thermal problem?

[BrianG]

zeropointbug:
The cover plate does slide off if you pop that little clear piece, but it's still kinda hard at first. So, I just popped off one side and it came right out. It's plastic so it bends a little.

The slab in mine was touching the middle as well. The pad covered the entire slab on both sides.

The inner slab is actually for another set of FETs. There it acts like a heat spreader. Ideally, you would find a way to attach that slab to the case as well, but it would be a little difficult. Smertzog (or something like that) installed huge heatsinks on his, but doesn't use the case anymore.

As far as if it is necessary for your emaxx: Improving its thermal characteristics is good for ANY vehicle, but makes more of a difference with heavier ones. Cooler devices means better reliability and longevity.

andywpj: Wow! You must really like the Quark controller!

[neweuser]

Originally Posted by BrianG

andywpj: Wow! You must really like the Quark controller!

My sediments exactly!:005: 280.00 x 5 = 1400.00!!!!

Ha actuality i have 5 quark two HV110 and two mamba max. because i convert my all truck to BL.

i thinking quark low speed startup smooth better over other esc.

By the way, about thermal pad , i use 37mm*27mm* 3mm copper to replace aluminum and use A.S
sticky fet and case.
very very good. but fet and copper sticky after you can't move them and no warranty, you must be know that.

[Serum]

You signature is funny Andy.. LOL

[zeropointbug]

Well, im stuck in a bind! They should have used small HeatPipes to conduct the heat from the top set of FET's to the bottom ones and case. Why would it make such a difference cooling only the bottom ones?? This is weird.

I THink i might just lap the bottom of the case and use A.S. to conduct heat away into the upper Alum chassis brace on my vehicle...

I live in Canada, so even in the summer, i would only drive the car max 25 degrees Celsius, and i don't drive that hard either. So maybe just doing what i will do will be good enough?

Do you guys that have dont the mod, do you get noticeable longer runtime?

[BrianG]

Really, the stock setup should be "good enough". If it thermals, then Quark support should be notified. These types of mods are done to make it run more reliably, so any mods are bound to make improvements if done right.

I haven't noticed any runtime differences, and I can't see how that would be affects. What it does do is allow you to run much longer (just about indefinitely) without worrying about whether it will thermal. If that's what you mean by runtime, then yes, it runs MUCH longer. :)

[zeropointbug]

k, well im just going to run it for now with a good HS of my own design, or i'll just integrate the HS into the upper chassis, to reduce weight, and i'm sure it would work even better than a separate HS.

Then, if i ever want to do the Alumina mod later down the road... and perhaps I might even mount liquid cooling blocks to each side of the FET's for extreme cooling, and then run the liquid along the aluminum chassis to cool it... PRETTY COOL

Cheers