Another Brushless REVO conversion

[coolhandcountry]

You trying to say it has more power brian?

[Serum]

I hear you Brian, but the nitro head is sticking out about 4 times as much.

[GriffinRU]

Originally Posted by BrianG

Oh, and apologies to Shark413 for hijacking his thread... :dft001:

Good call!

Artur

[BrianG]

@Serum: Yeah, the Nitro head does stick out more. Like I said, I thought I was maybe too anal. :)

@CHC: Yeah, I think it's safe to say that a properly sized BL setup has more "snap". :)

Since this thread has really gone away from the original topic, I was wondering if a mod could create a new thread and move the applicable posts there?

[Shark413]

I was finally able to get out to the local track (Hot Rod Hobbies in SoCal) today. The EVO's performance was very impressive. It held it's own agaisn't stock REVO's down the short main straight and killed them coming out of the corners because of the low speed torque. I was worried about the CG but she flew straight and level, easily clearing the doubles and triple jumps. The motor mount appeared to hold the motor very well and there were no problems with gear mesh or motor mount flex. I actually only got one tank through my nitro REVO because I spent most of the day running the EVO, it was that much fun. At first most people thought it was a standard nitro REVO but when it took off with no nitro buzz people started to gather to watch. I think Lipo's will be my next addition to lighten the truck and give it even more punch.

[coolhandcountry]

Cool!!!!
Poor nitro revo getting neglected. :D

[Shark413]

I still can't get over how fast and how well my Brushless Revo handles.

And this is with a mild Novak HV 6.5 and regular NiMh batteries. I

changed out the original battery mounts with some aluminum plate, the

new plates allow me more battery mounting options and are much

stronger. Some updated photos.



Modified the battery trays so they would be more modular and stronger.


Body finished, has not seen the dirt yet.


After a day at the local track.

[Shark413]

I just got around to cleaning my EVO and I noticed that the left rear shock rod end was broken. This is the same exact part that I broke on my Nitro Revo. At that time I thought it was because of the hot exhaust pipe causing the Rod end to melt. But Since the EVO doesn't have a hot exhaust pipe I guess it may be a design flaw. I changed the rod end out with an alloy part.

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.

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.

Shark, glad you liked the mount.

Sorry I haven't been around much, primary job has been killing me.

I'm not following on the chassis flex issue and I'd like to better understand what flex you are seeing there. It is probably something easy to fix with the right cross bracing.

I have a few updates to the kit I've made including a mount that moves the ESC up over the rear shocks where fans can get some air (close to the cooling holes in the nitro bodies on the Traxxas lids). When I get a few run off you and the others that have bought get free upgrades (just pay for shipping).

Can you shoot pics and maybe point out where the flex it coming into play?

I've had ZERO issues with the setup flexing on mine but I might not be pushing my machine as hard as you guys do, I just beat around the ramps at the skateboard park near my house and in the front yard.

[Shark413]

It's been awhile but I seem to remember that your mount bolts directly to the Revo chassis without using the stock Revo nitro mount. In that configuration I was seeing some flex in the chassis. The Motor kinda hangs out there on two thin pieces of aluminum, and without the nitro mount to tie the motor/mount to the main chassis/diff I was seeing some flex in the chassis (between the motor and the main chassis). I modified the nitro mount so I could use it with your mount and no more flex. Your mount is still going strong and I have a more powerful motor on order. Yeah the tray over the shocks would be great, I am currently running my ESC over the front shocks, but I would prefer it in the rear. The only issue is the Novak ESC with its built in fan is kinda tall.

[BrianG]

Yeah, I had a little flex with just using the chassis (not using b0gh0s' mount). I got the one in the RCM store (which uses the stock Nitro mount) and the spur is in great shape which tells me that the mesh is solid (no flex). Even though the Nitro mount is nothing special, the way it wraps underneath to the bulks really helps shore up the chassis in that area.

b0gh0s; nothing against your mount at all - I think it's still very nice. I just think some way to strengthen the chassis would help. Don't forget; some of the motors we use are a little heavier and longer than the HV motors, so there is more stress on the mount, which is transferred to the chassis.

[jnev]

Sweet revo shark. Did you get any pictures while you were at the track?

[Shark413]

RC, those pictures were taken a while back and no I didn't get any track pictures. But the next time I go I will try to get some pictures and video. I filmed video of my nitro truggy but forgot about the Evo because I was having so much fun with it. Since the pictures above I have gone back to the stock Revo truck body so everyone knows what I am driving. I have also added the following:

Tekno extended wheelbase rear a-arms
Hitech HS-985MG steering servo.
Single steering servo mod
Steering Mod
Alloy parts for all shocks (caps, spring retainer, rod ends)
Alloy tie rods and push rods
Removed one spacer from push rod to lower the chassis
Close ratio gears and FOC
Spektrum receiver and telemetry module
50wt & silver springs front, 60wt & blue springs rear
RPM carriers
Novak HV 4.5 motor
Alloy pivot post
Ti pivot balls
23mm hubs

well u cant brag with out pics ;)
LOL

sounds sweet! looks awsome!

[Shark413]

Ok Ok, here are some pictures I dug up.


Evo sitting on my tool box.


No that's my 1/8 buggy, but the Evo was in the pit area


See the Evo in the back behind my truggy?