E-Revo dewalt conversion
 

I recently bought the brushed E-Revo and I love it but I've been reading about people blowing up the factory titans so I'm looking into a replacement motor. I'm not expecting brushless speed but a little more would be nice and although I've seen a lot of people using 14V dewalt motors I haven't found anyone doing it with the 18V motor. Since I have several of these already, I'm thinking that might be an option for me. Anybody have any advice?

I used the 12v on mine. Worked very well and the motor was only $28 brand new. I am pretty sure the 12v and 14v motors are the same though. There is a good write up on the dewalt conversion over on the (dare i say it) traxxas forum.

Thanks Josh, I did see a few threads about the 14V but I'm thinking more along the lines of the 18V. Will that produce more speed/ torque or just suck batteries? Also wondering if the stock speed control can handle it.

I dont know if using the 18v motor will gain anything at all, but likely not. I think using the 12v motor and pushing 18 volts through it by running 5s lipo would be your best bet because i think overvolting the 12v would produce more rpms than the other motor on 18v. I only ran 4s on mine but i know a few people were running 5s with the stock speed control with good results and as far as i know havent burnt a dewalt motor up yet

From what I have seen and read the EVX-2 handles the dewault motor fine on 4s.

I always wanted to builld a brushed big motor revo or maxx for crazy water bashing in rivers and snow and stuff.

I guess the only thing really holding me back is th EVX-2 not having LVC.

Post up some pictures will yah.

Just get a Holmes Hobbies ESC with the waterproof option...

Here is mine.
http://img.photobucket.com/albums/v6...2110095049.jpg
http://img.photobucket.com/albums/v6...2110095114.jpg

@Reno- Which Dewalt are we talking? 12,14, or 18V?
@Arct- My main goal is to keep the price down so I wanna use as much of the factory equip as possible.
@ Josh- I wanna stay with Ni-MH to keep the $ down as well and to be honest don't know a whole lot (anything at all) about LiPos. What's their advantage?

@ Reno- Yeah I know I need to put some pics up. I have a bunch but I just signed up here recently and am doing this from my iPhone. Can't figure out how to load pics from that. I'll do it though. I have some group shots of my toys. :-)

I ran a 14v in mine for awhile, and it did well, its now a winter setup though. A friend stuffed a 18v in his emaxx. His gearing was about the same and so was the performance. So I say run the 18v if you got it. I abused my 14v with temps reaching 175 at times, no loss in performance over dozens of runs, so they can take some abuse too.

@Overdriven- Good info thanks. So you're saying I might not gain any performance with the 18V? Did his run the same temp as yours or did the more rugged motor operate cooler? And what about the speed controller temp with the 18? Is there a greater risk of frying that? What was the gearing and would you say it had more speed or acceleration than the stock setup?

Top speed on the 14v dewalt with the stock gearing was slower than the titans on stock gearing. So just swapping the motors will make your truck slower. I personally ran 21/65 which ended up noticeably faster than the stock setup with a bunch more torque too. On hot days I saw about 150 on the motor and 130's on the esc. I added a fan to the esc for safety and geared higher for awhile and abused the motor to the 175 I mentioned above.

My friends 18v needed a different spur and pinion combo because of the mounting of the motor in a Emaxx. But the overall gear ratio was very similar to my 21/65 combo, and temps were very similar to mine as well. So from what I saw theres not any real noticable difference in performance or temps between the 14v and the 18v in any way. So if you have a bunch of 18v, just use them, no need to go buy a 14v. But you will need to change the gearing to take advantage of the added torque and slower speed of the motor.

I still want to see what one of these motors will do on 6s lipo though, just for poop and giggles.

I never knew other voltage drill motors fit everyone on the Trax forum from what I know is using the same motor. 14v.

Personally I would probably get a kershaw brushed motor. I don't know enough about the drill motors to mess around with them.

from what i remember there is no difference between the 12v and 14v motors, but i could be wrong. Now i cant remember if i bought a 12 or 14v lol. As far as KD stuff goes i would stay away from it, i have never heard anything good about their stuff, but i have never owned any KD stuff either. But i figured since it was all word of mouth then it must be true.

Benefit???
 

What is the benefit of using a drill motor...when you have Castle motors out there? Heck, for that matter the Castle clones in Leopard Motors? What is deal here?

dewalt motors are cheap, make big power for a brushed motor, have replaceable brushes unlike stock traxxas or KD motors. Its just a good cheap upgrade for people who dont have the money to go brushless.

Well said Josh. I paid $28 bucks for my 14v dewalt locally. it was alot of fun before I decided to go whole hog into brushless and lipo. Being completely waterproof without affecting your warranty has it's perks too. I'll be swapping my dewalt and EVX2 back in and wrapping my lipos in seran wrap for some fun in the snow like I did last year.

I don't want to bad mouth Kershaw, but they're just rebadged generic motors. The dewalts are alot tougher. Mine did require one of the motor mount holes to be enlarged a little, the kershaw doesn't. But the hole I enlarged is not meant for standard 25mm bolt pattern motors, so it's doesn't ruin the mount if you want to use a different motor.

@Overdriven- One more question if you don't mind. How does the battery life measure up with the drill motors? I use DTX 5000 Packs.
@BigHouse- The advantages I see are price and durability. I currently have 3 18V Dewalt screw guns in my basement that I got dirt cheap/ free and only 2 hands so I figure why not give one of them a greater purpose in life right? :-) As far as durability I've had one of them for over 10 years now and it was used when I got it. I've used it to mix 5 gallon buckets of spackle, drive 3" deck screws and everything in between and the only thing I had to do was shell out $5 forna new set of brushes. Those things are bullet proof!

another reason, there are some setups not truly made for brushless, Like the traxxas summit. Soft long throw suspension without swaybars and overpower do not mix

@Corey I haven't run NiMh in quite awhile. When I run my lipos on the dewalt in the winter I set the timer on my Tx to limit the runs to about 12min due to the lack of a LVC on the EVX2. But I don't remember there being much difference in run time between the titans and the dewalt when I was running NiMh.

@Overdriven- Again thank you. Dumb question but you run a single 14V right? Is the battery life significantly longer then the dual titans?

Twin dewalt 18v.
 

I have a twin Dewalt 18v setup on my RCM/FLM Maxx with the Novak Heavy Duty ESC. With the 18volt motors you are adding a lot of extra weight, but the torque is enormous. Dewalt under rates its motors by about 50% for safety, leaving lots of room for higher voltage operation if you want. The thing about using the heavier duty motors is that you need to beef up your drivetrain to handle the power of these beasts. If you have ever used Dewalts 18v drills you know what I mean. You can gear it just about any way you like, and the motor will handle it. You just have to use common sense and watch your temps just like any other new setup. Sure its not the norm around here, but they are pretty cool to play with for the money you spend compared to brushless. I picked both of my motors up on ebay a few years ago for next to nothing, and they still run like new. A lot of guys have talked down using them, but they work great in the Maxx.

Oh and Kershaw Designs is a one man operation (Dan) and he is an alright guy. You treat him right and he will do the same for you. I have picked up a few things from him in the past with little issue. He even sent me the wrong spur gears once, and when I told him, he sent me the right ones and then told me to just keep the other ones. No extra charge for the mistake.

Thanks Jerry. I have the e-Revo would is setup from the factory for BL so I'm thinking a single 18V Dewalt shouldn't be an issue. What gearing would you recommend for that setup if I still wanna be able to get wheelies but also increase the high end as well? Sorry, I'm kinda new at this modifying stuff.

Yes I ran a single 14v. I've had thoughts about running 2 just for shits and giggles, but I kinda doubt the evx2 will handle it. If I ever get the time to make a mount and another motor I might try it on my MMM. Run time (battery life) on the dewalts is similar to the titans from what I remember on NiMh, maybe a couple minutes longer, not much tho. For gearing start out at 21t or 22t pinion and 65t spur. If you want more speed swap to a 62t spur. Just watch the esc temps, but in this weather the esc should be fine with the 22/62 combo.

It seems like Im one of the lucky ones when it comes to the drivetrain of my erevo. I've never broken anything except for one rear diff and that was after lots of abuse from a variety of motor setups. And it stood up to the 1520 on 6s lipo for quite awhile too. But dual dewalts would be just as tough on parts, and therefore alot of fun! I've actually been collecting parts for an Emaxx based 1/6 scale that will be a no nonsense allweather basher. Dual dewalts are under consideration due to price, durability and the not caring about overheating them factor.

Sounds like you're building quite a beast! Is it a pain to take the motor from the screw gun and get it all wired up right and fitting it in the truck?

Overdriven, I too had great luck with my erevo drivetrain even running a 6s CC2200 setup. It never failed on me and all of it was stock, diffs, shafts, etc. However stock servos were another story, they were a joke, either burnt up or stripped.

I like the dewalt motor idea for a high torque basher. It also still retains it's waterproof capabilities.

Corey. It's not hard. There's a bunch of threads on the traxxas forum that'll guide you if you need pics. Just unsolder the wires from both titans, twist them together (the titans are wired in parrallel, use both sets of wires) and solder them to the brush assembly where the spade connector goes. You'll probably have to enlarge a hole in the motor mount with a file or dremel. Worst part is getting the stock pinion off the motor and making a flat spot on the shaft for a rc pinion. I cut through the pinion with a dremel as much as I could, then put a flatblade screwdriver in the slot, twisted it to break the pinion.

TexasSP. Yea mine is all stock too, got it used and never checked or shimmed the diffs either. It took the dewalt, cc2200 on 5s for a long time, the 1520 on 6s finally killed the rear diff, but it took quite awhile. Oh, and I have my slipper locked too, I know someone out there is cursing my luck after hearing that! The dewalts are a nice setup for bashers that don't need to go over about 30mph. Over that and you should start thinking about a 2 speed trans to keep the evx2 happy. If my 1/6 emaxx starts getting heavy I'll go with a 1520, otherwise it'll be a dewalt on either side of the cd. Rather the dewalts because I won't be tempted to check the temps while pounding it. Either way I'll waterproof my v5 mmm and run a bigger fan on it.

That doesn't sound too bad. I'm actually almost looking forward to burning out my titans so I can upgrade. LOL Do you recommend a fan for the ESC to be on the safe side? If so are they fairly inexpensive and simple to install?

I have to second what Jerry said about Dan, he is a good guy. If I remember correctly he is a physics teacher and does the Kershaw Designs thing on the side. I have always had good luck with him and you can probably get some gearing ideas from him.

Thanks 76. I'll keep him in mind. Love your profile pic by the way. America needs someone like him again...

Also dont forget to use the diodes from the titans or you will have horrible glitching problems

Forgot about that. Not having to worry about glitching with 2.4 will do that to you. As far as kershaw goes, I was just voicing my opinion that the dewalt is a better option than a single kd motor. As a matter of fact, some dewalt users on the traxxas forum use his "overdrive" pinions in conjunction with a 2 speed tranny to get over 40mph out of their trucks.

@Overdriven- So no diodes needed with the 2.4 ghz? That's cool! I never understood why they don't put 2 speed trannys in electric from the factory. What kind do you recommend? What's the selling points of his overdrive pinions?

Kershaw designs
 

Yea just like MonsterMike Dan has been playing around in this hobby for quite some time and has a pretty good idea of how these things work. He has allot of options available for spur gears and pinion gears and will gladly suggest the best idea for your preference.

I would put the diodes on the motors anyway, but thats your choice. You will have fun with using the Dewalt motor, and it will hold up well to most anything you put on it. They are a fun alternative for brushless and much cheaper. They are considered the novis choice and a great way to learn more about our hobby.

I didn't use diodes and suffered no ill effects with my 2.4 radio, but it is a good idea to do. Kershaws overdrive pinions are just really big. They are needed on some of his kits, and can be used with the dewalt too. The only 2 speed kit I know of for the erevo and emaxx is the traxxas kit. You should check out these threads, lots of info in them.

http://monster.traxxas.com/showthrea...ghlight=dewalt
http://monster.traxxas.com/showthrea...ghlight=smoked
http://monster.traxxas.com/showthrea...t+installation

Yeah, I checked out that 2 speed kit on the Traxxas site and it looks like you need to manually switch gears from the transmitter not like the self shifting trans on my nitro trucks. What's up with that? Who wants to buy a 3 channel transmitter for that?

That is understandable, but I would think you get a low KV brushless system, that is not putting out the power but the torque, power it according.

Auto shifting 2 speeds are used on nitro vehicles because of the lack of low rpm torque produce by a nitro motor. It helps them accelerate quickly and also reach high speeds. An electric, especially brushless motor has very linear torque, and lots of it, so a low 1st gear is not needed. Some elec. models come with a manual shifting 2 speed to make driving in different terrain easier. Say you wanted to drive up a steep hill, you could shift into 1st and power your way up. But after that, you wanted to cruise down some trails, just shift it into 2nd and goose the throttle.

But a properly geared brushless motor and some lipos will tear off the line and make your pants heavy with its speed. :lol:

Dewalt motor in Summit is great!
 

Hi guys, I have have a dewalt 12 volt xrp motor in my summit with a Castle Mamba Max esc running a 4s 6000 45c battery arrangement. I started with a 14.4 volt Dewalt motor out of a new drill I have had for about 9 years. I ran an 18 tooth pinion with the 68 tooth spur gear, I then bought a 12 volt motor and installed it with a 16 tooth pinion running the same spur. I am very happy with both setups. The 12 volt gives me a little more acceleration and a little more top end but the gear noise is much higher with the smaller pinion. I can bash around till I get tired of driving (about 30 min) and put in about 2500 mah back into the batteries. The motor temp is fine (for a Dewalt) I can just hold my hand on it for about 5 seconds. The esc hardly gets warm,(the only way I could get the fan to come on was to climb my legs at a really steep angle in second gear for about twenty minutes) and the batteries are just a couple of degrees hotter than ambient temp. I also bought an 18 volt dewalt motor and I am going to try it on 6 cell lipo as well as the 14.4 volt motor on 6 cell lipo. I noticed that even though I am on 2.4ghz, my radio range was reduced to less than 1/3 when I didn't use the noise suppression capaciters on the dewalt motors, so needless to say I installed a pair of .1uf ceramic caps. onto the motor and my range returned to what it was when I had the stock Titan motor installed. I learned another thing about these Dewalt motors, the older new styles have a rear bushing and are single wound and the latest style has a rear ball bearing and is double wound. I put a drop of locktight on the rear bearing housing to lock the bearing in place because the outer race was spinning slowly in the bore of the rear housing when I was breaking in the motor. (this was a new motor). I am having an issue with the Castle esc. In brushed mode, the esc goes right to reverse instead of breaking first if you coast for more than about 1 second. I tried different settings and it is still the same. I installed the esc in my brushless e-revo and it was fine, so it appears that it only has a problem in brushed mode. I called Castle Creations and spoke to their techs and they said it sounds like a software issue, so I am waiting for them to get back to me with a software solution for the braking issue. (Nothing like coasting a second on asphalt in second gear after winning a race and then touching the brake and watching your Brand new Summit do an endo onto its roof and slide down the road!:gasp:) Well I broke in the body anyway!:tongue: