ANOTHER Flux MMM goes up in flames!?

Originally Posted by Unsullied_Spy

6s lipo on the Savage really isn't for bashing if you ask me. 4s to 5s is best. If you gear down to compensate for the added weight and rotating mass it'll be fine. I run a MMM with an 80mm MedUsa in a ~16 pound Muggy and it's fine because I gear to compensate for the massive tires and the weight of the thing.

Outerwears on the Baja and the MMM are different. The Baja's flywheel is able to pull air through the filter very easily, the tiny fan on the MMM would have a harder time plus the filter will hold heat in.

So far it seems to me that you've been running yours within the safe limits of the power system and it has been fine. Running 6s with even stock gearing with wheels/tires that weigh 1+ pounds each is what will kill your ESC, Motor, and batteries.

So when I go to 40 series and maybe 6S, should I drop to 18 pinion?

[e-mike]

try 18 tooth lowest timing,punch at 60% more airflow and check the temps

[Unsullied_Spy]

Originally Posted by Freezebyte

So when I go to 40 series and maybe 6S, should I drop to 18 pinion?

What's stock pinion, 20T? I'd use BrianG's calculator and set a target speed of 35-40 MPH and measure your temps often. If your temps look OK then you can bump the pinion up a little.

Originally Posted by Unsullied_Spy

What's stock pinion, 20T? I'd use BrianG's calculator and set a target speed of 35-40 MPH and measure your temps often. If your temps look OK then you can bump the pinion up a little.

Yah, its 44/20T. What calculator?

[Unsullied_Spy]

Originally Posted by Freezebyte

Yah, its 44/20T. What calculator?

http://www.scriptasylum.com/rc_speed/_solver.html

I'm not sure that you really need a 12T pinion, perhaps a 15T to start with.

Originally Posted by Unsullied_Spy

http://www.scriptasylum.com/rc_speed/_solver.html

I'm not sure that you really need a 12T pinion, perhaps a 15T to start with.

Good god, a freaking 15T pinion just for getting bigger tires? Thats rediculous.

[JThiessen]

Originally Posted by Freezebyte

Good god, a freaking 15T pinion just for getting bigger tires? Thats rediculous.

Just run the numbers and see what it tells you. Dont forget to account for ballooning on those Joes - should be significant unless you tape the crap out of them. Just like putting bigger tires on a real truck, gotta gear down too if you want to keep your power. 99% of the "maroons" running 35's and 6" lifts dont realize that until its too late....they now have a gutless penis extension....

Might not be able to fit a 15T on the Flux - depends on how far you can adjust the motor.

Originally Posted by JThiessen

Just run the numbers and see what it tells you. Dont forget to account for ballooning on those Joes - should be significant unless you tape the crap out of them. Just like putting bigger tires on a real truck, gotta gear down too if you want to keep your power.

Might not be able to fit a 15T on the Flux - depends on how far you can adjust the motor.

Well for one thing, the Flux motor isn't on that calculator nor the 40 series tires

[TexasSP]

Originally Posted by Freezebyte

Good god, a freaking 15T pinion just for getting bigger tires? Thats rediculous.

It's physics, and it won't change no matter how much you hate it. It doesn't matter if you use CC, tekin, novak, or some other brand.

The heavier you get the truck, the more you need to gear down as well. It's not just wheel size but rotating mass and total vehicle weight as well.

His problem is a combination of stupid moves.

1. Heavier tires and wheels
2. Adjusting the EPA to limit speed
3. Putting a sock on the ESC
4. Not adjusting gearing
5. Not verifying that when he reassembled the truck that there was no binding

All of these combined for disaster.

Last note I will make is that anyone investing this kind of money into a high performance BL RC should spend the 15 bucks at least for a temp gun and monitor your setup constantly after any new changes.