Need help setting up a Genesis
 

Some may remember that I was trying to convert a Cen Genesis to a brushless truck. I have the driveline conversion done. I have pulled the tranny and have opted to run a locked center diff with a 66t spur gear. I am running a MMM v3 with 2200kv combo, of which I've fried two of!!! So what I need to know is what Battery setup should I run a 4s, 5s or 6s lipo? I plan to run an 11t pinion on the motor and I want to keep the stock wheel size which is 7.5. I was looking at a pair of thunder power 5000 mah 40c 2s lipos and was wondering if this would be enough to move the truck without any problems. Also should I adjust the motor timing to one. I am not concerned with insane speed, 40mph will be plenty for a truck this size. Some one please Help I don't want to cook another ESC they don't taste very good.

anyone? anyone?

I run 2 LST2 conversions with 63/18 with the CEN wheels and run 4s with out any heat issues what so ever.
Based on similiar gearing and weight of our trucks I'd say YES, 4s and a 11T pinion should be fine especially if you get the ThunderPower lipos.
I have my motor timing at low(5) if you experience heat issues dropping the timing could be helpful

does a fireball constitute as heat issues?

nah. ??

How much does that CEN weight fully loaded, and whats the diff ratios?

If you aim for about 35-40mph on 4s lipo you shouldnt be having any issues, unless its more than about 12lbs..

I'd say it probably weighs around 15lbs! I know with the nitro and all it was 17lbs. The diff is 26/9 I think.

Shoot me a PM, I can shoot you some pictures... I've made about 4 GST 7.7 Conversions.. Once you're done, It'll weigh close to 18Lbs...

If you want 40MPH, you'll have to run 6S, and 14T pinion on 1st gear Spur.. I run a 24T Pinion on mine with stock 43T spur..

I was hoping Aqwut would chime in, hes the resident CEN guru :yes:

15lb though, thats a hefty old truck fo sure....

so does anyone have any suggestions on setting up the mmm settings? Punch control, throttle curve, brakes, reverse settings. I just wanna keep this thing from going up in flames again!!!!

Leave the throttle linear, 40% brakes, reverse 30%, punche control 50%
This is a great STARTING POINT, adjust from there concerning heat issues and driving preferences.

Thanks now if only I could come up with the money for a good pair of lipos!!

Well I got my lipo. I found a max amps 6500mah 30c 4s pack on ebay. Set up the truck with my punch on 100 and brake on 25(truck does and endo when I apply the brakes should I go lower or higher with the brake number to stop this). The truck ran great, wheelies on demand, esc only went up to 115, motor went to about 110, and battery stayed around ambient temp of 80 or so. I was very please with the exception of the brake hicup. :)

Get us some pictures, and a video....:)

Reduce brake strength to prevent endos, but its only at 25% correct? Sounds like you have it set for forwards-brake-reverse (near 0 rpms); you need to change that to forwards-brake-reverse with lockout (so it will only go to reverse once you've stopped, released the throttle, then re-engage reverse).

Thanks that fixed the brake issue.

On another note the truck did something that I totally would not expect it to do, especially on just 4S... it did a standing back flip for me. :surprised: I could not get it to do it again but I will try to get a video this weekend of it running.

here are a couple pics of the truck

Looks good except for that damn MA pack. Get a good 5S pack and you'll be in business.

It's about all I wanna handle with the 4s pack now I don't want to think of what 5s would do. I adjusted the throttle curve and still can't keep the front wheels on the ground.

That's a good thing! :lol:

Here are some videos of the truck running. Sorry for the low quality!!
http://www.youtube.com/watch?v=oTZ4JxHet8Y
http://www.youtube.com/watch?v=AyE9KOKQN8k
http://www.youtube.com/watch?v=9JA_2tS4Jzo

The third video was funny, I think we've all done that at one time or another.
Looks like she's running good for you, now go bash the crap out of it !

I lost a tire from the rim once, but never a whole wheel :lol:

Nice vids.

A couple more videos from the same day
http://www.youtube.com/watch?v=ZYXC9wiXo0A
http://www.youtube.com/watch?v=RvmS8FqvBpI

No wonder the wheel fell off, smacking that curb like that. OUCH. Made me cringe.

The wheel came off because of the lack of loctite.

Hmm, I have the same 23mm hubs on my LST2's and never used the stuff there,never had any probs.

Great vids man... but stay away from the curbs... :)

Anyone know where I can find hardened pins for the hubs as well as aluminum wheels to fit a 23mm hex. I just sheered a pin, cracked a hex, and twisted it in the wheel, all at once. Another loose wheel issue. Damn you torque you are now my enemy.:grrrrrr:

You could use drill blanks or piano wire...

I'm not sure if piano wire is hard enough. I use it in my Crawlers. This truck has a ton of torque, and is capable of doing standing back flips.

Hey, how did you mount the center diff? And what center diff did you use? The standard? And what spur gear? I'm trying to make a GST conversion as well, but not sure on how to mount the center diff! :)

Could you post a few more pics, especially of the center diff setup? I've been asking all around the web for some specifics on how to do this, so I'm hoping you can help! :D

As far as the pins.. I bought a new 23mm adapter set for another car, but I believe I ended up using the pins from that set in the GST. They are really thick and need to be pounded through the hole.

I just made a custom mount based around the Matrix TR mounts, and the one found here on the Monster store for the motor mount. I used some aluminum stock found at Lowes, 1/4" steel brake line for spacers and various hardware found at the LHS. I used the 66t spur from the matrix tr mounted to the center diff out of the genesis trans. I don't know how much more info I can give, it's been a a year or so since I built it.

Ah ok, thank you. Got some pics of the setup? Can't really see much of the center diff from the pics already posted.