Direct Drive to Diff E Revo Build

[johnrobholmes]

Just realized I was looking at the wrong motor specs, so the kv would be 604 for an 8Y wind.

[sikeston34m]

Originally Posted by johnrobholmes

Just realized I was looking at the wrong motor specs, so the kv would be 604 for an 8Y wind.

That's not a bad place to be IMO. So are you going to go with the Wye termination?

What truck are you planning on going with? The Revo?

I just did another run "test".

4S 10,000mah Lipo yields 52 minutes of pretty hard runtime.

40 minutes into the run, I thermaled the ESC again. This wasn't showing up with the lower capacity batteries. I think this Revo will be getting a Monster Pro for Christmas.

Maybe do a small Cap mod, then attach it to the Aluminum mounting plate with some thermal compound. That should work well for this system.

After the 52 minute run, temps are:

Motor = 125 degrees
ESC = 105 degrees
Batteries = 95 degrees

These Lipo's can give 100 amps continous with 150 amp Bursts. It shows in the performance too. I can tell there's alot less voltage sag under a load, especially compared to the 4000mah Lipo's.

After seeing how things went today with the different voltage levels, I prefer the 4S Lipo Best. With this motor, anything above that, it gets hard to control.

With this setup On 4S Lipo, You will find Nitro parts in it's droppings!

[sikeston34m]

Hey BL Revo, need to clear some messages out of your box. I can't send you a PM through there.

PM me your email address and I'll send you the videos.

[johnrobholmes]

I dont know what I will put it in. The only ride big enough is my x1 CR and I still haven't gotten satisfactory battery trays made up for that one yet. I am going to try a smaller outrunner in a wheely king rig first I think. I messed up the winding on my first try today, and I could fit another strand or two in as well.

[BL_RV0]

i wouldnt get the 125b, it has the same overheating issues that the 80b does, unless you do the mod, but that voids your warranty.

[sikeston34m]

Originally Posted by BL_RV0

i wouldnt get the 125b, it has the same overheating issues that the 80b does, unless you do the mod, but that voids your warranty.

I'm pushing alot of power through the 80b, and I know there is some seperation from the heat sink inside. I've had it apart a bunch of times.

The Monster Pro 125 has a higher rating because it has more FET's on the power card. This also means less resistence, so more power flow.

I really like the Quark line, mods or no mods.

[johnrobholmes]

I switched to 5 strands of 22 awg wire. Crikey it is hard to wind tight! Took more than an hour for one phase of the motor, only 2 left. With all this work I will leave all 6 ends open so I can switch from D to Y termination on the fly. Just so happens that a 8D on 3s is almost exactly the same rpm as an 8Y on 5s (wattage should be the same too). Time to test this kv VS startup torque thing.