Dual Revo 3.3 BL conversion build-up
 

Hi, me and my brother are currently working on getting Revo 3.3 rollers off ebay and converting mine to single BL and his to 1 or possibly 2 motors. So I thought I'd start a thread on all the shananigans. :yipi:

Got the first roller off ebay for 250 a couple days ago, it even has the RC monster mount already on it, full RPM arms, battery straps, and apperently locked into 2nd gear too! :intello::na: I'll have a mamba 4600 in it for quite a while, then I want to run a Feigo 8XL on 4s 4400 mah cells on it, does anybody know what kind of runtimes and gearing I should get on this set-up? Im thinkin' some 1st gear action and small pinion with mamba; and 2nd gear medium pinion with 8XL. Too bad I won't have a pinion for it until RC monster gets some of those 1/8'' in stock. :no:

I'm not too sure but I think a mamba 4600 is too small to run in that, its meant for smaller 1/10th scale vehicles i.e. stampede

The MM4600 is the only motor I have right now for it. I've been running it in my rustler, so I'm not expecting anything higher than 25mph. My budget won't allow a good motor for quite a while. :gasp:

i run a 9xl on my revo. and its a little bit better then the 8xl cause it runs cooler and longer. i run my gearing at 19/36 with 4cells and its pretty fast. if you race i would get the center diff.

[QUOTE=Topspeedtimmy;131812]The MM4600 is the only motor I have right now for it. [QUOTE]

If you run it in the revo you may turn it into a paperweight.

Yeah, i'm not sure if I can gear it low enough, especially at 60k rpm... but I do have a temp guage, so I won't allow it to overheat. Plus I don't mind if my Revo doesn't break the 20mph barrier, at least not for another 4 months. My brother's Revo won't be quite so lame i'll bet. Okay, so heres the plan: run it in 1st gear and buy the smallest 1/8'' mod1 pinion.

I'd listen to Dafni - Maybe run it in your basement but not worth spending $12 on a mod1 1/8th pinion.

You'd be better off getting the $50 together for a 9xl.

Yeah, maybe I will just wait several months until I can conjure up the 130 bucks and buy a motor and 5mm pinion, and not even waste $12 on a pinion for crappy ol' Mamba Max.

Well...

You could give it a try on 11.1v (3s lipo), 14.8 (4s) will spin the motor too fast and cause alot of heat. You can get a 9t pinion from century and use one of mike's bore reducers so that it will fit on the 1/8 shaft of the 4600. With 40/9 gearing it would top out at 30mph in 2nd gear, so it may be ok. Here is the copy of briang's speed calc so that you can see what I used to get the numbers:

Differential Ratio: 2.8461538461538462
Transmission Ratio: 2.2941176470588233
Other Ratio: 1
Spur Tooth Count: 40
Pinion Tooth Count: 9
Total Voltage: 11.1
Motor KV: 4600
Tire Diameter (inches): 5.75
Tire Ballooning (inches): 0
Motor Current Draw: 0
Motor coil Ω: 0
Spur/Pinion Ratio: 4.44 : 1
Total Ratio: 29.01961 : 1
Tire Circumference (inches): 18.06 inches (458.83mm)
Total Motor Speed: 51060 RPM
Vehicle Speed: 30.1 MPH (48.35km/h)
Effective Speed Rate: 2.71mph/V (4.36kmh/V)
Effective KV Value: 4600
Motor Torque: Amperage not specified...
Final Torque: Amperage not specified...

dont you think that gearing is a little tall? what temp do you get and how much does your truck weigh.

if I were you I would definatly wait until you have enough money to get a feigao. going from a standard to an xl motor, the power difference is amazing, and you will beable to gear higher. IDK about 19/36 high but definatly higher than 9/40. If you must go with the 4600 for a while you could try it on 4s if you have a 4s battery.. I hear a lot of ST guys running there 4600s on 4s and I havent seen any problems.

19/36 isn't that tall because the 9XL spins so slow, even on 4S. It has the torque to move the truck quickly without a problem (with a 2-speed) and get good top speed as well. Without a 2 speed though, you may want to gear lower to have a better range. I'm running 18/36 with a 9XL ad my motor temp has never gone above 160's and the ESC and battery are under 120.

well dang I went with 17/?? with a 10xl on 4s, but my truck is hefty for a revo

I plan to run 17/36 with a 8XL to start, then maybe 18/36 when I get a 9XL.

I wonder if it would be possible to put a Rustler 48p spur and pinion on the revo somehow? Then I could be geared 15/86. No problem for the mamba 4600 then...

i have read that if you put some thin washers under the trans. you can get the jato spurs in there, i dont know if there is anough adjustment though, but for $3 a gear its worth a shot

(54,56,58 tooth gears, 32 pitch)

The xl5 rustler gears will fit on the revo slipper, but I do not know if they will be too large in diameter and contact with the chassis, etc. Not sure if 48p will hold up, the mesh will have to be spot on, and no dirt or sand can come in contact with it. I would try the jato spurs and 32p pinions, like the emaxx pinions. A 54/12 or 58/13 would give the same ratio as the 9/40 and not require any bore reducers as the emaxx pinions are 1/8 bore. The 32p will hold up much better than 48p too.

So 0.8p metric is exactly the same as 32 pitch? The Jato gears idea sounds good.

On the other Revo, would a 6xl on a Traxxas VXL ESC powered by two 3s lipo packs in parallel be any good in terms of power and heat?:neutral:
I would think the VXL would be able to handle the amps being rated at 200 amps constant.
The other possible set-up would be dual Velineon systems each powered by a 3s on an E-maxx trannsmission, which would cost more but it would most likey run cooler and faster.

Just got the Revo 3.3 today...wow it's pretty freakin' sweet. Don't have any gears for it, so does anyone know for sure if 32 pitch emaxx gears will mesh with a Jato spur?? Please respond quickly, I really want to get this thing running. :tongue:

Heres some pics:

yeah jato spurs are 32p, i run them on my revo, with 32 pitch pinions (emaxx stock)

Okay thanks, i'll be off to the LHS tomorrow, I could try 13/54 and if thats running too hot, i'll convert it back to 2 speed. Will 22/54 fit on the RCM motor mount for a 9XL?

dont know, i dont think anyone has tried it yet with jato spurs

you may have to dremal the chassis to , if the driveshafts hit

Now that I think about it, there would be no point to use a $12 5mm emaxx pinion for a Jato spur when I could also buy a $12 5mm mod1 pinion, then I could just use the stock Revo spur.

Went and got 12/54 gearing because they were outta 13 tooth pinions. The power is not like a Rustler with the 3s MM4600, but then again the Rustler is 2WD @ 5 pounds and the Revo is 4WD @ 8.5 pounds (yes that's running weight). Those light-weight Response tires (195 grams instead of 250 gram talonz) help take some tax off the MM4600. It's some very decent power and unlike what most people suspected, no the motor was not a paper-weight after the run. I was able to get 2 runs of 20 and 40 minutes and the motor was 115 degrees and the ESC was 125 after some heavy grass driving. Took some video clips, so I'll try to make a movie tomorrow and post it.

so you get the jato spurs to fit?

the 2spd helps a smaller motor push this truck, but i am suprized that the temps were so low

read that post, enjotles. :whistle:

Actually I was talking about what pinion I would use if I got a 9XL, right now with the MM4600 i'm running 12/54 emaxx pinion/jato spur combo (had to shave the chassis down a bit and put thin washers under the tranny), and it's locked in 2nd gear.

Threw some clips together with some metal and I got this mess: http://s248.photobucket.com/albums/g...=rocknroll.flv enjoy.

AWESOME video man! Best music I've heard in a while! :diablo::yes:

That Revo moves pretty well with the 4600, too. Better than (I think) we all thought it would. Q: Does the motor ever reach full RPM? 4600 kV is HUGE for a MT, you should try a 10/11T pinion if you can. You might see wheelies then!

I think I hit the sweet-spot gearing wise. It's got just enough speed, and the temps are really low, though it was 40-50 degrees outside. The ESC would probably be 30 degrees hotter if it was 80 but that's still not too hot. As far as rpm it seems to be running well, it spools up fast and hits top speed quickly and doesn't seem to be very bogged down even in the grass. :mdr:
It was able to do wheelies on my very first run when I had the slipper really tight, even up to 5 mph rolling wheelies. I loosened the slipper for the run caught on tape, but it was a little too loose and would slip alot under acceleration. My next video I will try to get some wheelies and maybe a little off-road action. :smile:

Ahhh ok. You had the slipper set to slip. Who would've thought?? :lol:

I think if/when you upgrade the motor you'll be back to full tension on the slipper, but it will slip anyways. Some guys with lighter ST's like myself could get away with not having a slipper since the tires would just spin, not putting much stress on driveline components. But once you're into the 8+ pounds range with 5" tires it becomes more of a necessity.

Was gonna start filming clips for the next movie when what do you know?! It snowed about 4 inches! Straight from 60 degrees one day to 15 the next and 4 inches of snow.

So water proofing was necessary. I just wrapped the servo and receiver in plastic wrap and made a little dome of plastic wrap over the ESC and motor that went over the roll bar.

After that, filming proceeded as awesome. Snow Ruts show off the Revo's fast-reacting suspension really well (definitely gonna do some slo-mo) and the 'ol pond was frozen over with 3 inches of ice, making for some good drift action. I was actually able to get up to full speed on the ice before having to initiate a high-speed drift so as not to slide out of the pond. One more run and I should have enough clips for a short little movie.

On another note: still looking for another Revo roller.

Ice drifting... I saw a few vids of clods doing that once and it was hilarious- I think a revo should handle it a bit better however...

Timmy - If you want a 8XL for cheap, ask Dirt101 if he still has his. He might hook you up! =)

Still putting together snow vid of the first REVO, it's gonna be pretty good, trust me.

We actually put in a Velineon system in it and geared up to 18/46 from the 12/46, and it was running good; I punched to full throttle down the icy road it roared to a pretty impressive speed that was quite a bit faster than the Mamba 4600 on the same battery. Only problem was right after that my 76 amp 3s battery could NOT take it and dropped below 9v setting off the Low-voltage on the VXL ESC putting into 50% mode. Reset it, tried another speed run, but almost everytime I got up to full throttle it would cut-off. I manged to get a full-throttle down-hill speed run without it cutting out. The Velineon could have been pulling 100 amps or more, so either better battery or gearing down, temps were still good.

But more importantly another roller revo was had but this time without a transmission or Rc monster mount. A E-maxx transmission will most likely be loaded on to it, but the new E-maxx transmission looks like it would be worth waiting for. Too bad it has a 2.5 chassis, good thing was it was had for only $110 shipped.

Pics of the 3.3 with the Velineon and the new revo:

Got the Revo 3.3 video done with all the snow driving. It turned out pretty well. Put alot of hours into it. It's got exactly one wheelie in it, I found a nice patch of cement that wasn't covered in ice or snow so as to get some wheelie traction. And yep, put in the Velineon, and it was sweet. Take a look:
http://www.youtube.com/watch?v=58IxjfbOagM

Very slick video, I really like how you synced the action and the music. Looks like a good preformer with the velineon motor.

The velineon motor does do rarther well, all things concidered.

I have a new idea for a set-up for the Revo 3.3. how about this ESC: https://www.unitedhobbies.com/UNITED...idProduct=4691 with my 6s 3800mah 20c pack on a 12XL? I've seen one other person running this ESC and it seems to be good bang for the buck. Anyone think this a good idea? :neutral: