Another Brushless REVO conversion

[Shark413]

Hi, my first post here. Every since I got my Revo (nitro) I wanted to convert one to electric power. I have a tricked out E-Maxx but the Revo just handles so much better. I can't wait for Traxxas to make one so I started collecting the parts to convert a nitro Revo to brushless. I finally got enough of the parts to start putting my brushless REVO project together. I was waiting on a custom motor mount (thanks Paul) and it finally arrived this weekend. First, many people who do these conversion use the E-Maxx tranny and motor mounts, I wanted to use the stock Revo tranny with it's auto 2 speed and disk brake. So I needed a special motor mount to use the REVO tranny. I had to machine a stock REVO nitro engine mount to fit onto the new brushless motor mount to give it extra support. The brushless motor puts out a lot of torque and without the extra bracing the chassis flexes way too much.


Here is my Nitro Revo and the roller chassis I am using for the brushless conversion


Here is the custom motor mount


Stock nitro Revo motor mount machined to fit the brushless motor mount



Bottom view of the motor mount



Here is a picture of the chassis with the battery trays mounted

I still need make a plate for the receiver and ESC to sit on (waiting on some carbon fiber stock), I have to install the motor, tires, paint the body and hook up the disk brake. Still have a ways to go but I should soon have it ready for a test run. I would also like to mouint the batteries lower, so I may play around with different mounts to get the CG perfect.

that looks very nice. good job on it. you could mount those batteries on the underside of the chassis to get a low CG.

http://www.rc-monster.com/forum/show...?t=4725&page=4

i also did a revo conversion.

you could make a mount plate for the esc and attach it to the rear shock tower where the exhuast hold down attaches.

[BrianG]

Welcome to the forums!

Nice job on the conversion!

A suggestion? You could try to move your brake servo further forward and make a new brake linkage. This would give you more room on that side for longer batteries, like Lipos. Even if they are on one side, the balance should still be very close since Lipos are lighter and you have the motor and some of the tranny on the other side. You could mount the receiver and ESC on the same side of the motor and you should be golden. Just my $0.02.

Good job!

[Shark413]

Thanks for the tips and suggestions, I appreciate your input. Still a work in progress. Sounds like a very knowledgeble group here, so I am sure I will be updating this thread with many more questions.

Regards

[Serum]

Looks great Shark!

Nice motorholder; looking at the edges, is it lasercutted?

You might need to support the motor to keep it from flexing.

Kyosho batteryholder enable you to hold 7 cells per holder.

[jhautz]

Hey Very Nice!!!

Love that motor mount. I was thinking about doing something like that but never got around to it. Do you by any chance have the drawings or a CAD file for a that motor mount? Id love to make one for myself.

[Shark413]

The motor mount came from a fellow rc monster poster, his URL is www.eaglesviewaerial.com/products.html and he does fantastic CNC machining in metal and carbon fiber.

When I first got his mount I installed it as is, with none of the stock REVO motor mounts. There was a ton of chassis flex, so I decide I needed to also use the stock nitro motor mount brackets and reinforcement brace. I had to mill the nitro mount flat so I could bolt the brushless mount on top of it. Then I added the extra Traxxas reinforcement plate and bolted everything together. After all of that there was no flex at all, but I agree that a motor brace (rear or mid) would really bulletproof the mounting. I think I can machine a small "U" shaped bracket that can fit under the motor, which I can bolt to the mount. This should provide good mid/rear mount support for the motor.

[squeeforever]

Nice conversion! I am thinking of doing another, very similar. Stock 2 speed, FOC, center diff w/ rear brakes, and 4S LiPo on the right side with the 2 servos and motor on the other.

[GorillaMaxx360]

Nice conversion

[BrianG]

Originally Posted by Shark413

The motor mount came from a fellow rc monster poster, his URL is www.eaglesviewaerial.com/products.html and he does fantastic CNC machining in metal and carbon fiber...

His name is b0gh0s. I was going to have him custom make a motor mount for me for my Revo, but he got too busy. His current mount wouldn't work with the XL motors because they were too long and rear wires would hit the suspension arms due to the mounting height of the motor.

[Shark413]

It Lives....

Last night, I mounted the motor and ESC. I moved the battery trays lower, hooked up the brakes and put the tires on. If weather and daylight permit, I will give it a run today. Also, I will try to find my scale and see how heavy it is.


Motor mounted



Completed chassis


Wheels on


Which one is fastest?

[Serum]

Hard to tell, which hvmaxx is it? they are not known for their brutal strength, but so is nitro.. :p

[coolhandcountry]

Looks nice man.

[Shark413]

Serum, where could I find some Kyosho batteryholders? I checked around but couldn't find any.

[Serum]

Mike carries them, shoot him an email.