Anyone ran 6S in the New E Revo yet?

[OldSoldier]

Originally Posted by OldSoldier

I was on the Traxxas forum and some of the folks there are using the Traxxas Velineon brushless system in the E-Revo, but they are using them in pairs! Compared to the Neu, Feigao, and other motors we use on this site along with their high-powered speed controllers, the Velineons are cheap and easy to find. Here is a list of other advantages of this approach:

Cheap Motors
Cheap Speed Controllers
Easy to find at hobby shops
Great Traxxas support and warranty
heat is spread over two motors so temps may be lower
heat is spread over two speed controllers so temps may be lower
Two ESCs means two heat sinks
It can be run on 2s or 3s
Higher kv motor (3500 rpm/v) means less voltage needed (lower temps)

Frankly, I can't see the down side. A pair of Velineons (two motors and two speed controllers is about $340. That is much less than a Neu and Quark 125. Mamba Monsters might change that equation since they are not too expensive, but who can find one?

OK, I just installed a pair of Traxxas Velineon brushless systems in the E-Revo that I recently saved from the fire. So far I'm VERY impressed. I have only run it at 2s so far (one 2s battery per ESC) and the speed and acceleration seem great for tight tracks. I did notice that I can't pop wheelys anymore I think going to a pair of 3s or reducing the size of the pinion gear would give it the torque to flip itself over from a dead stop. Right now I'm running 20 tooth pionion and stock 68 tooth spur. I'll test a pair of 3s (also saved from the fire) tomorrow.

[sikeston34m]

"OK, I just installed a pair of Traxxas Velineon brushless systems in the E-Revo that I recently saved from the fire. So far I'm VERY impressed. I have only run it at 2s so far (one 2s battery per ESC) and the speed and acceleration seem great for tight tracks. I did notice that I can't pop wheelys anymore I think going to a pair of 3s or reducing the size of the pinion gear would give it the torque to flip itself over from a dead stop. Right now I'm running 20 tooth pionion and stock 68 tooth spur. I'll test a pair of 3s (also saved from the fire) tomorrow."

From everything I've read, the Twin Velineon setup is impressive. But as with most things, there are pros and cons.

You listed just about every pro known to man. LOL

I don't mean to be negative, but there are a few disadvantages to it also.

1. Extra Weight.

2. More Amp Draw - Lower Voltage setups are going to draw more amps to produce the same amount of wattage output at the motor(s). Which brings us to #3.

3. More heat at the motor(s). I've read where people who run this setup, say it runs hotter than what they think it should.

4. 1/8" motor shafts. Easier to acquire pinion gears, but the shafts are alot weaker than 5mm ones. I've seen more than one broken.

Give it a shot on the 20/68 gearing, but you are probably overgeared. Keep a close eye on temps to make sure you don't fry those motors. I would run it for a minute, bring it in and check. Then run it for another minute or two, bring it in and check.

Let us know hot it works out.

[OldSoldier]

Originally Posted by sikeston34m

"OK, I just installed a pair of Traxxas Velineon brushless systems in the E-Revo that I recently saved from the fire. So far I'm VERY impressed. I have only run it at 2s so far (one 2s battery per ESC) and the speed and acceleration seem great for tight tracks. I did notice that I can't pop wheelys anymore I think going to a pair of 3s or reducing the size of the pinion gear would give it the torque to flip itself over from a dead stop. Right now I'm running 20 tooth pionion and stock 68 tooth spur. I'll test a pair of 3s (also saved from the fire) tomorrow."

From everything I've read, the Twin Velineon setup is impressive. But as with most things, there are pros and cons.

You listed just about every pro known to man. LOL

I don't mean to be negative, but there are a few disadvantages to it also.

1. Extra Weight.

2. More Amp Draw - Lower Voltage setups are going to draw more amps to produce the same amount of wattage output at the motor(s). Which brings us to #3.

3. More heat at the motor(s). I've read where people who run this setup, say it runs hotter than what they think it should.

4. 1/8" motor shafts. Easier to acquire pinion gears, but the shafts are alot weaker than 5mm ones. I've seen more than one broken.

Give it a shot on the 20/68 gearing, but you are probably overgeared. Keep a close eye on temps to make sure you don't fry those motors. I would run it for a minute, bring it in and check. Then run it for another minute or two, bring it in and check.

Let us know hot it works out.

Update:
I just tried a pair of 3s Lipo batteries in my twin-Velineon E-Revo. I am VERY impressed with the speed! Its about as much as I can handle. I have 8th scale Crime Fighter tires and the balloon into saucers at full speed and spin on asphalt!! The highest temp I saw after a short bashing session with a couple wide-open-throttle runs was 142 on the motor and 137 on the two speed controllers. The Traxxas instructions say the motors should be kept under 200.

I appreciate the Cons...those are some things I had not thought of. I'll continue testing, but I need to go somewhere with a little more room because it is so fast I cant keep it at full speed for more than a second near the house.

Originally Posted by OldSoldier

Update:
I just tried a pair of 3s Lipo batteries in my twin-Velineon E-Revo. I am VERY impressed with the speed! Its about as much as I can handle. I have 8th scale Crime Fighter tires and the balloon into saucers at full speed and spin on asphalt!! The highest temp I saw after a short bashing session with a couple wide-open-throttle runs was 142 on the motor and 137 on the two speed controllers. The Traxxas instructions say the motors should be kept under 200.

I appreciate the Cons...those are some things I had not thought of. I'll continue testing, but I need to go somewhere with a little more room because it is so fast I cant keep it at full speed for more than a second near the house.

try going to a local school and run it on a soccer/football field with short grass...it will put a smile on your face.........

[Topspeedtimmy]

Actually 20/68 is probably a little undergeared, my dual velineon Revo likes 19/62 a lot; temps stay below 155 in 80 degree weather. It runs hotter at 19/68. Easily 42-45mph at 19/62.

[sikeston34m]

Originally Posted by Topspeedtimmy

Actually 20/68 is probably a little undergeared, my dual velineon Revo likes 19/62 a lot; temps stay below 155 in 80 degree weather. It runs hotter at 19/68. Easily 42-45mph at 19/62.

Aaah, Nice!

Here ya go Soldier. Topspeedtimmy is the voice of experience with this setup.

[OldSoldier]

Originally Posted by Topspeedtimmy

Actually 20/68 is probably a little undergeared, my dual velineon Revo likes 19/62 a lot; temps stay below 155 in 80 degree weather. It runs hotter at 19/68. Easily 42-45mph at 19/62.

TST,
I noticed you have a Revo 3.3 with Feigao 9XL and a Mamba Max running at 4s. Are you saying you can run that without overheating? Or do you actually have a Mamba Max Monster?

[OldSoldier]

I can't wait to try 19/52 gearing, but I suspect 19/52 and 20/68 are close to the same thing??? One tooth on the pinion is the same as ??? teeth on the spur?

...I running to the hobby store right now to see if they have a smaller spur gear.

[blueb8llz]

Originally Posted by OldSoldier

I can't wait to try 19/52 gearing, but I suspect 19/52 and 20/68 are close to the same thing??? One tooth on the pinion is the same as ??? teeth on the spur?

...I running to the hobby store right now to see if they have a smaller spur gear.

not always true, but one teeth on pinion is close to 3 teeth on spur.

[OldSoldier]

Question for TopSpeedTimmy... or anyone else...

How do you have the twin ESCs wired? I have mine completely separate:

Battery1-->ESC1---Motor1

Battery2--->ESC2---Motor2

ESC1 and 2 are connected to a "Y" cable. I cut the red wire from ESC2 so the Receiver would not have two power inputs. After thinking it through...I don't think it was necessary to cut the red wire on ESC2.

Thanks,

[Topspeedtimmy]

Originally Posted by OldSoldier

Question for TopSpeedTimmy... or anyone else...

How do you have the twin ESCs wired? I have mine completely separate:

Battery1-->ESC1---Motor1

Battery2--->ESC2---Motor2

ESC1 and 2 are connected to a "Y" cable. I cut the red wire from ESC2 so the Receiver would not have two power inputs. After thinking it through...I don't think it was necessary to cut the red wire on ESC2.

Thanks,

1. 19/52 yields a 2.73 ratio. 20/68 is 3.4 ratio, so it's a much higher gearing. My gearing is 19/62 which is 3.3. 19/52 would be good for a 50mph speed run, may be too high for off-road running.

2. If you plan on running this reliably you will definitely want to link both batteries in parallel to both ESCs. This will make it so the motor systems get the exact same voltage and run the same speed and will also make it so that the LVC kicks in at the same time for both systems.
I'm pretty sure you need to cut the BEC wire, that's what I did and it runs well. The ESC that is powering the BEC tends to run a little hotter than the other one.

3. I actually got my 9XL from arct1k a month ago (the same one he ran for a year? ). But I haven't run it yet, because the Mamba Max has been in the repair shop for 5 weeks. So I've had the Revo for 7 months and I haven't even been able to even run it. I'm not allowed to drive the dual Velineon

[OldSoldier]

Originally Posted by Topspeedtimmy

1. 19/52 yields a 2.73 ratio. 20/68 is 3.4 ratio, so it's a much higher gearing. My gearing is 19/62 which is 3.3. 19/52 would be good for a 50mph speed run, may be too high for off-road running.

oops, when I said 19/52 above...that was a typo...I meant 19/62. But thanks for the ratio information above. I used to wonder how folks computed the gear and drive ratios. I can see from your numbers above that its just spur tooth count divided by pinion tooth count. Duh! Sorry, I took electronics, not mechanics. Slap me! (always wanted an excuse to use that emoticon).

So I ended up going the hobby shop and getting a 62 tooth spur and used a 20 tooth pinion.... She was out of control! I don't have a speed gun, but my wheels were complete saucers and I had almost no weight on the front wheels for steering! It was a blast! 150 degrees on the motor 147 on the ESC.

I'll make the wiring modifications tomorrow if I can. Thanks for the tip...something in the back of my mind was telling me I should have done it different...that's why I asked. What you said makes perfect electronics sense.

[OldSoldier]

Originally Posted by Topspeedtimmy

2. If you plan on running this reliably you will definitely want to link both batteries in parallel to both ESCs. This will make it so the motor systems get the exact same voltage and run the same speed and will also make it so that the LVC kicks in at the same time for both systems.
I'm pretty sure you need to cut the BEC wire, that's what I did and it runs well. The ESC that is powering the BEC tends to run a little hotter than the other one.

OK TST,
I made the wiring modificatiions last night. I hate soldering those new Traxxas connectors, but I'm getting better at it. I'm going to sneak out of the office and run to a nearby park to test it. Hope nobody comes looking for me

[OldSoldier]

Originally Posted by OldSoldier

OK TST,
I made the wiring modificatiions last night. I hate soldering those new Traxxas connectors, but I'm getting better at it. I'm going to sneak out of the office and run to a nearby park to test it. Hope nobody comes looking for me

Just finished a 10 minute bashing session with my Twin Velineon Revo.
What a blast! I'm running 62/20 gearing and its as fast as ____

I installed a set of fans on my speed controllers and temps are down to 105 for the ESC and 140 for the motors. The E-ReVVo is so fast, one of my tires came unglued! And just FYI, I also installed a set of Tekno anti-sway bars. This is the best performing RC vehicle I've ever built. Its what I've been trying to build from a TMaxx chassis for the last two years without success.

[OldSoldier]

Originally Posted by OldSoldier

Just finished a 10 minute bashing session with my Twin Velineon Revo.
What a blast! I'm running 62/20 gearing and its as fast as ____

I installed a set of fans on my speed controllers and temps are down to 105 for the ESC and 140 for the motors. The E-ReVVo is so fast, one of my tires came unglued! And just FYI, I also installed a set of Tekno anti-sway bars. This is the best performing RC vehicle I've ever built. Its what I've been trying to build from a TMaxx chassis for the last two years without success.

I just did a couple speed passes with a Garmin GPS. With 62/20 gearing I could reach 44.5 miles per hour. I was not using fresh batteries. I have not had a chance to try it with fresh batteries, or other gearing options.