Successful 5S LIPO run on Mamba Max

[jollyjumper]

dude, thats crazy!:026:

[JOHNNYMAXXIMA]

Finnster,
How did you measure the top speed? My single BL Maxx did 46mph on radar and yours seems to be quite a bit faster than mine. I think if you tried to get top speed on that street in the vid that is not going to be long enough. I think it looks faster than 48mph but that could just be me.

i had the same issues... if you get the g2r it will become much more stable... longer chassis + lower cg = more throttle!!!!

[Serum]

Doesn't look faster to me Johnny..?

Cool thing though, makes me want to drop my MM on my 8XL as well..

I tested the 7XL on 5S lipo.. That's pretty amazing fast..

[captain harlock]

Serum, does your Mamba Max dude coggs at launching?

[Finnster]

Originally Posted by JOHNNYMAXXIMA

Finnster,
How did you measure the top speed? My single BL Maxx did 46mph on radar and yours seems to be quite a bit faster than mine. I think if you tried to get top speed on that street in the vid that is not going to be long enough. I think it looks faster than 48mph but that could just be me.

I did the top speed testing at the initial 5s run a couple weeks ago. I basically had a very long pathway in a park to do it. I ran the car repeatedly in both directions and measured with my radar gun. It was a very consistant 48 (once of 49 ;) .)

I didn't do any radaring in the vid, it gets a bit tough to do, and I have the truck coming right at me. No one wants to see that in a vid :) (unless I managed to run into myself, that could be entertaining.) The initial speed run was with the stock tires, but I switched to 17mm beadlocks with mashers. I actually couldn't get upto fullspeed as the tires would turn into 10" pancakes and swerve badly out of control, that or the front end would pick up. Most of the shots in the vid I let off the throttle as soon as the front end comes up or the wheels balloon too much and it starts getting unstable. This usually occured if I went full throttle, so most of the vid was partial throttle or it would just go flying onto its back.

I think the 48 was a very fair speed, tho I think I could break 50 with lightweight hi-speed tires and a modest diet. All I know is its quite fast enough. :018:

[Serum]

Cogging? what's that..

this movie was before i programmed the controller to the esc. on this movie it was smoother backwards than going forward. after programming it was like this in both directions

this is the micro-movie

[Serum]

And yes, i am winning the ugliest tire contest with this vehicle.. I know..

[Finnster]

Originally Posted by riceman

Thanks for posting up those vids. Did you do any special proramming of the Mamba Max? I've tried out different battery combinations myself. My LST2 conversion does fine with 4s 8000mah and also with 5s 4000mah. However it is not too happy with 5s 8000mah. With the 5s 8Ah it will run only if I ease the throttle up but once it reaches half throttle it shuts down. I haven't quite figured that one out yet.

Hmm that is odd. My MMax is actually stock from the box. My comp is having a little meltdown w/ the usbs and I've never had a chance to program it. I could do some manually, but.. been having too much fun to bother.

Besides myself and Cart123, you are the only other I've heard to run 5S yet, so its very much R&D at this point. Did you but in a voltage cutoff? My only thought is that perhaps with your large truck and big 1515 Neu motor you end up pulling a lot more amps and lose voltage below the cutoff. Or its just too much for the esc... I would think the 8Ah batts would be better as far as voltage drop, but maybe they are lower C batts vs the 4000s and don't handle the lg load as well. Perhaps its even a bum cell in the 8Ah pack... :032:

Cart123 actually ran more voltage (6S M1 cells) but really only had thermal issues IIRC, so I don't know if its raw voltage. We're playing on the edge of the edge w/ the equipment, so there are no guarantees. Very nice conversion tho, drives great.

[captain harlock]

No, I'm not talking about the movie. I'm talking about whatever vehicle you're using the mambamax with.

Here's the question again:

Some people says that their rigs stutter when they make them accelerate- with the MambaMax being used.
Did you experience the same thing, Serum?

[Serum]

No, but mine isn't a good refference yet.

I am doing some indoor driving with 8 cells and a 1400kv 6 poler.

[Finnster]

Originally Posted by captain harlock

No, I'm not talking about the movie. I'm talking about whatever vehicle you're using the mambamax with.

Here's the question again:

Some people says that their rigs stutter when they make them accelerate- with the MambaMax being used.
Did you experience the same thing, Serum?

Now that you describe it, I have experienced that w/ mine before, irregardless of cell count tho. What its like is as if the brake is suddenly applied for a fraction of a second. The first time it happened i thought I had blown and seized the diffs. It only did it to me when the truck was far away. I thought it was a reception problem, and was one of the reasons I switched from Am to FM and to the Rx pack from Ubec.

It pretty much went away after that, but did happen but once. hmm....

[squeeforever]

Serum, whats wrong with the Badlands? I kinda like em...

[Serum]

They are HPI GT tires actually. badlands are rather cool, and probably a ton lighter..

[jhautz]

Thank you for posting this. I have been kicking around the idea of puting the MM in a 1/8 buggy on 5s and wasnt sure if I wanted to trust the MM to be stable at 5s. From what you are seeing it sure looks like it will be fine in a smaller lighter buggy vs the Revo. You have convinced me.

BTW: You arent kidding about that thing having some kick either. It looked like it was literally jumping off of the ground without a ramp when you punched it. Nice work.