Planning Revo V2, to use stock tranny, C. diff and RCM motor mount

[Finnster]

Work has been moving along. Got the basic chassis all back together. Got (one of two) trannies modded, and got the bottom plate for the batt/esc tray completed and mounted. Still have some work on the batt tray. Needs straps and some guardrails. Then just need to mount electronics and then I will be good to go. I'm waiting on 500K oil for CD, so I got an FOC for the stock 2.5 tranny and have that mounted. Weight was 220g IIRC, but got excited and didn't write it down. I'll get better weights later. Pics:







Did the 2nd gear locker BrianG style. I notched the clutch slightly to fit the 4mm screws, and tapped the 2nd gear as well. I lined up the clutch so that the drive arm is engaged, and the notches hold it solid as well. I'm sure I could have used just two screws, but no biggie. I made the notch in the clutch so that the arm could not disengage even it wanted to. Its def solid. I had socket head screws, but button heads would work as well. The screws must be 4x10mm tho. Any longer and it comes out the back and into the drive gear (not shown). I have man brakes, but this way I can simply switch back and forth between motor brake&reverse or man brakes and Fwd only. May just keep the 2nd tranny so I have one with a CD/rear brake, the other with a solid axle and possibility of reverse. Its easy to swap the two out.

Nice job so far!

[gasshead]

you do know thaty with an electric motor you would still have reverse even tho you have the CD. so i would just keep the CD trans and sell the other one, unless you are gonna switch from nitro to electric. i also ground down the peice that holds the little brake arm thin from the front of the case. it looks better IMHO

[Finnster]

Originally Posted by gasshead

you do know thaty with an electric motor you would still have reverse even tho you have the CD. so i would just keep the CD trans and sell the other one, unless you are gonna switch from nitro to electric. i also ground down the peice that holds the little brake arm thin from the front of the case. it looks better IMHO

Yeah, there would be nothing stopping running the CD in the reverse direction. I would have to disable the man brakes tho, and I'm not sure how motor braking w/ a CD would be. Seems like it would get wierdly balanced pretty unpredictable, but then again I've never tried it. The big diff in the trannies would be if I will like the CD or not, or at least having the option to quickly change between a solid center & CD. Aside from the small notches, everything is reversable should I decide to sell it or not. Perhaps someone would even want a locked tranny for their conversion? :) Either way, I have two clutches, one is modded, and prob will stay that way for a while until I see how it drives and what I want to do w/ it.

[Rich Racer]

Originally Posted by Finnster

Perhaps someone would even want a locked tranny for their conversion? :) .

Like me if you would so happen to want to sell it!!

I am trying to sell stuff to get my e-revo finished. It is taking forever LOL. I have taken a lot of notes from you guys

[Finnster]

Pretty much wrapped up the batt mount and esc tray. Everything is together, so I threw some batts in and took for a drive. Very pleased with results. The truck plants and takes off with very little wheelie action (which was one of the main goals of this build.) I can also accel a lot harder w/o fear of the backflips.

I'm still waiting on some parts, so I mounted the Rx temp on the st servo and made up a makeshift antenna mount. The ESC is held down well w/ HD velcro, but I want to work on getting this a little straiter and more secure. I have the solid axel tranny in now as well, as I'm still waiting on 500K oil from AMain hobbies. I also have a new Futaba 3PM coming, so I will figure out a better mount and hopefully be able to use the BEC w/o glitches (still using RX pack.) Also have some Ti tie rods/ hinge pins, and some red tubes for the pushrods on order as well.

I still have stock diffs, as I've laid out quite a bit for some goodies on the side. My other truck lasted months on the stockers, but I think I already killed the rear. I was launching it really hard in the street testing it, and now its clicking... 1/8s may have to go in as well... Going to try a stocker in the interim as I've done the wallet some damage, so those may have to wait.






Need to clean up some wires as well w/ the batts. Everything is close now, so I can trim things down. Some other wiring may change w/ new Rx and BEC. Enjoy in the meantime. :)

[Serum]

That's one loooong sucker with the 3.3 chassis and the setback arms.. :)

Looks like it has a nice low CG though!

[gasshead]

man that looks awesome. i never really liked that motor mount but i beleve its growing on me, except for the price tag. kinda hard to get quality stuff with a low budjet

[jnev]

Very nice. But, that thing looks really long!! lol Looks like you were able to fit everything on it pretty easily with some room to spare. Nice job.

[Finnster]

Alright some more updates. :) Got the rest of my parts in. Replaced all the stock steel stuff w/ Ti and TRX red Rods. Lots of good weight savings, I'll post some #'s later. Got the Futaba 3PM-Fasst radio and really like it. Was able to hook up the BEC glitch-free, so nice to dump the RX pack. Here's a shot:
Bec mount:


Rx mounted on Top of BEC:



Cleaned up wiring a bit more, but still need to trim batt and ESC wires. The stock roll bar has very convenient clips to hold the deans connectors. :028:
Chassis Final layout:



Mounted the MM properly. Made a 2nd little mount for this, then bolted to batt tray. Secure but easy removal, and double sided tape sticks well to the mount plastic. The UHMWPE is slippery like teflon, so things need to be bolted down to it.



Got the CD in. Filled with 500K fluid. I really like driving w/ the CD. Truck turns on a dime, and feels really stable and firmly planted. I do not think my front is unloading too much, but I have a really long chassis and I have a lot of weight moved up front, so this prob helps vs some others who have not had so good of experience w/ the CD. I do not notice a big diff from the solid center in terms of unloading, but I will have to play with it more to be sure. I don't think it would have worked on a 2.5 chassis tho. Too much weight transfer. This one just squats, plants and goes. No wheelies as hard as I try. :027:

The turning radius, diff tuning and brake bias seems well worth it tho if it works. Currently running 50-500-30 in the diffs. I have some tuning to do now, but very pleased with it so far as is.

Lastly, I was able to fit my old shell from my Emaxx. It just fits. :) I'm glad bc the stocker is wasted, and it will be a while before I can paint a new one. Plus I really liked that shell, glad I didn't sell it w/ the Maxx. I'll have to get some better outdoor pics when the weather improves.




I'll update again w/ some tech notes and some weight info.

Since you are running a center diff, the servo is for the front brakes obviously, but is the motor used for braking the rear??

- bspate -

Originally Posted by bspate

Since you are running a center diff, the servo is for the front brakes obviously, but is the motor used for braking the rear??

- bspate -

he has the rear brake kit for the 3.3 tranny he's using.

Originally Posted by candy76man

he has the rear brake kit for the 3.3 tranny he's using.

Ah dang.........I didn't even look close enough at the last pics he posted. I was looking at the pics he had above without the rear brake.......my bad.

Thanks for setting me straight.

- bspate -

[Finnster]

Originally Posted by bspate

Ah dang.........I didn't even look close enough at the last pics he posted. I was looking at the pics he had above without the rear brake.......my bad.

Thanks for setting me straight.

- bspate -

Np, there is several evolutions/ stages and it gets is little muddy. I ahve two trannies, one w/ cd, one w/ solid axel. I had the solid axel 1st awaiting the 500K fluid, but now I am just using the CD. Must say I like it alot, despite some front unloading I'm seeing the more I drive it. Really needs 800K lol.

[Finnster]

Some action shots of today's run at a local construction site. Its huge, ~200 acres, so lots of different stuff to do.

Did some high speed dirt driving still testing/learning the setup, donuts, mild crawling, huge hill climbing, powerslides, small jumps and even some loop-d-loops. :)

Waiting for the Youtube vid to finish processing, but here are the pics: