Brushless Cen Genesis Gst owners please stop in!
 

Hi Guys.

I've been considering doing a brushless conversion on the Cen Genesis Gst 7.7 MT.

The thing just looks really cool.

I've seen several conversions, but I don't think I like the center diff setup.

What are the options? Will a Transmission be the ticket?

I just don't want the center diff action and am not fond of trying to lock a center diff either.

The setup has to be tough. Power Plant of choice with be the Castle 1717 motor on either 6S or maybe even 8S. The Mamba XL will be the ESC.

I've seen setups with one large pack toward the front between the frame rails. But perhaps a battery compartment configuration similiar to the flux is in order.

How tough are the Cen Genesis diffs? What's the gear ratio?

I know with this kind of power on board, things need to be tough. The Cen Genesis comes with some big meaty tires, that's for sure.

So many questions, so few answers, but I do love the looks of the Cen Genesis.

Feel free to post here. Any input is greatly appreciated. :yes:

front driveshaft is plastic and it looks somewhat fragile, but people have succesfully planted a 1515/1y directly on the transmission and driven it atleast. You need a new idler shaft for this though I believe, or you need to get the RCM 2 speed pinion. Don't think you can remove the 2 speed spurs from the tranny.

Cen gen 7.7
 

I too have been leaning towards the Cen Gen model for some time now. I also like the beefy look of them without it looking clunky. A brushless setup would be a great conversion project for sure. It is a very cool looking truck but I have never run one before. So can you tell me how it handles compared to say the ERBE or the Maxx line? With those big tires it should be able to go through just about anything I would imagine. I am looking at putting one of my Neu 1717 motors into a Maxx soon, and I can only imagine that the same motor would work great pushing the Cen Gen through its paces. As for the center diff setup there are pros and cons to using it over the two speed tranny. Using a tranny with a BL motor of that size really is an inefficient driveline. The center diff is something that more and more people are switching to in place of using a tranny because of the simplicity and less weight. Using the center diff with one of Mikes slipperentials is an ideal setup for a truck like the Cen Gen 7.7. The only other thing that comes to mind is a direct drive setup with the front and rear dirveshafts connected directly to the motor output shafts on both ends. That has been done before by SSSConcepts and a few other guys around here. So you just have to pick what works for you and try it out. Have a back up plan waiting in case something goes wrong with the first setup. Thats just the way it goes.

the latest two conversions i've seen are mine http://www.rc-monster.com/forum/showthread.php?t=28507 and i forgot who did the other, but we both agreed to mount the motor (1717) on the front and batteries to the rear of the truck using a center diff. i have mine locked which i want to change out. especially with the larger tires, there is too much gyro effect and trying to get up to speed using 6s is pointless for me. the slightest bump or finger twitch lifts the front up and over.

beyond not locking the diff, the only other improvement i would make to mine would be getting some shorter lipo's so i can lower them down on each side of the rear drive shaft. that was my original plan, but i worked with what i had and my packs are too long.

i do not think 8s is needed at all with the 1717 motor. you will have a very hard time trying to control it, and the gearing options using a center diff is already on the tall side.

as for the truck handling the power, if you ever seen one of these things in person you would see pretty much the most beefy drive train in the market. go for it.

also i need to update my pictures since i've made some changes. i no longer have the motor plate in the truck to us saddle packs on each side of the rear driveshaft and i've redone my motormounts. also i have fried my esc and i'm waiting on a mmm to be shipped to me.

http://www.rc-monster.com/forum/showthread.php?t=28504

this is the other build, much better machine work and pictures. i strongly believe this is the best setup for the chassis.

Thanks everyone. Great Information!

How well do those plastics driveshafts hold up? Is there a CVD kit for this?

Also, instead of using a center diff or the original tranny, how well would a E Revo tranny work?

This would give a bit more gear reduction.

I noticed such a small motor gear and large spur is required with the center diff.

A E Revo tranny is tough, plus it would add a slipper to the setup.

Hmmmmm.............how to hook the tranny up to the center drive shafts?

I haven't had a CEN Gen in particular, but I've used some of the parts for other vehicles.

The diffs are beefy, but they are made of cast metal. I had particular problems with the pinion gear snapping teeth. The internals are very stout however. Going to a machined pinion would be much better. The BP Sav diff pinion might be an easy upgrade. Ratio is a low 2.89.

The slider seems quite strong. The big question I had about it would be that the crosspin is small, and I wonder if it would stretch out the hole over time. OTOH, it is much stiffer plastic than a Revo's, so might not deform so easy. Everything is standerd size hardware, so just going to a cup and dogbone would be easy. May need a custom bone if you can't find the right length.

Parts seem cheap enough on ebay, but ordering directly from Cen is more expensive and sometimes slow.