"Frostbyte II" still running warm
 

Allright, just got back in from around a 10-12 minute run with FB2 just outside the apt complex. I was driving it with a new RCM 18t pinion with standard 44t spur gear.

I ran in standard 2-3 inch recently mowed grass with a bunch of high speed runs, stops slide turns in and out of the grass and small sandpit whee the playground equipment was at. I stopped and checked temps several times and on my motor were showing around 120F at the hottest point according to my Duratrax flashpoint gun and the MMM fan was always running when brought the truck in.

I then moved onto flat, rocky dirt area that had random spots of fine dirt, small rocks laid out and random slippery grass/weed spots. I did a variety of high speed runs, slide turns, dead stop full throttle mashes, wheelies and just gave the truck a good hard run for around a minute or two and brought it back in a few times for temp measurements. The motor was now showing 154 F in the hottest area and I was showing around 120-130 F on the side of the ESC next to the motor with the fan always blowing.

I drove the truck back slowly on the concrete and disconnected my Turnigy 5200mah 30c 2s lipos and found the packs to be fairly warm. Not hot but definentely warm, warmest i've ever felt on them. It was sunny outside and around the 60's

So, even with the 20t to 18t pinion reduction, it looks like this XL conversion is still putting alot of load on the entire brushless system. I'm wondering if I need to step up to 6S power so it can move the heavier mass from the tires on a larger footprint from the XL conversion easier Or is it something else? My punch was at 0% with 0% brake drag, 30% brakes and 25% reverse throttle with LVC at 3.5v and timing set to normal. Keep in mind also that the motor endbell is still sealed with button bolts to keep dirt out of the motor, if that makes any difference

Input or suggestions?


http://i100.photobucket.com/albums/m...sealmotor3.jpg


http://i100.photobucket.com/albums/m...e2/retire4.jpg

Suggestions

- Weigh the truck setup to run
- Do a run with the stock tires
- Do a run with the screws out of the motor

This should at least increase your understanding of whats going on in some way.

Those temps are fine - ditch the OCD and enjoy it!

Found this on rctech in regards to the Neu-Castle 2200kv motor which is similiar.

This is of course just someone posting but there are other posts around that seem to support it. What would be better is if there were easy to find info on manufacturers sites about max motor temp.

Those temps are fine. Stop worrying Freeze and play with your damn toy.

Stock tires are long since thrown away

Don't have a weight scale

I suppose I could try removing screws, but dangit, I wanted to keep the dirt outa the motor

Most of the motor mounts these days cover everyone of those holes, that isn't a reason for higher temps. Keep them plugged.

Gear down if anything.

Finer than fine. If it gets 180-190 then I would start to worry. If you feel that uneasy about it, get one of the awesome 1520 or 1518's on sale and go 5 or 6s

The screws are not going to make a damn bit of diff either way in terms of temps. Better to keep it clean

AMEN!! Go play with the truck! Its fine.

Get a CC blower if you are worried about motor temps....

there is a block off plate that is suposed to keep people from damageing the windings just behind the end bell that would stop airflow even if he didnt have the screws in it

i see temps like that with the 2200 in my buggy on 5cell, you are fine

Temps are great! Everything being warm is a good sign. If one componet was significantly hotter than the others you could worry. My guess is you saw a jump in temps when you hit the loose stuff over the grass due to wheelspin. Trust me it will heat stuff up fast(but looks cool doing it). For a truck that size don't really know why your running anything less than 6s, but most would say it's a matter of opinion, I say yes to efficiency. Other than that, run it till the wheels fall off.

I'll run it again tomorroo at bash pit with 10% punch control and see what that does.

Not sure if I wanna spend the money on 6s lipos when its getting so close to winter and the Flux will be shelved.

So it seems the temps are ok but i guess having lower temps would allow running in higher ambient temps and prolong the life of the electrics a bit.

If your not overly interested in trying to understand the causes then just buying a larger spur and or smaller pinions to try would be way to go. Gearing down further should cover most things assuming nothing is actually wrong.

Such a shame. A winter themed Savage that sits throughout the winter.