I just picked up a MM 7700 in a horse trade....
 

Has anyone tried Mike's Revo mount in a Jato 3.3 chassis? :eek:

i duno about the mount, but idk how well a 7700 will do in a jato, it might be a hot runner

Think it's too heavy? Would a Rusty be a better choice?

Maybe Ebay the motor and put the money toward an 8XL or 9XL motor?

well i know brian runs a 4600 and it runs good, with heatsinks, u would have to ask, my buddy runs a 7700 in a rusty, but still i would run a 5700, or a 4600

u dont need a xl for a jato, maybe a l can and gear it uo for high speed, but id say a 4600, pm brian g

Well, if I sell it, I'll use another motor I could use in my Revo, so it sounds like it would be over motored. Although, I could use the MM software to "de-tune" it slightly, couldn't I? It should run cool right? Would probably be an 8XL of some sort, on 7 cells.

I'm sure Brian will chime in, and his words of wisdom should be public knowledge.:dft012:

well 8xl is too much motor, just pm him and ask, i don have a jato, but i am positive it doesnt need a xl

The Mamba Max motors should work fine in a Jato. The 7700 would be the fastest if you were running 7 cells, although it may run a bit hot. Set motor timing to lowest to help. The 5700 was respectable on 6 cells in my MT2 (heavier than Jato and 4wd) before I went 3s lipo on it.

lol, an XL is WAYYY too much motor for a Jato. About the only good thing about an XL motor on a jato would be to add weight in the rear end. The 4600 MM motor on 4s with decent gearing would be insane. Better get those tires duct-taped. :)

On 2s with the 4600 and tall gearing, I get ~45mph. It runs fine and temps are good too (much to my amazement really). Weight is around 4.5lbs IIRC loaded with 2s2p emoli. I'm thinking about redoing the battery and ESC/radio mount so I can use regular lipos for less weight.

I don't really want to go through the hassle of selling one MM motor to just buy a milder one. Can I de-tune it to the point that it performs like the 4600? Also, Brian, any idea about Mike's motor mount?

I just ran a couple of calculations, what do you guys think about running it on 4 cells or the lipo equivalent?

Oh, and guys, it's just not right laughing at the noob so much....:013:

:005:

no its not de tuning, its the motor does NOT have the torque to move that jato efficient compared to a 4600

and 4 cell lipo? or nimh, if u were doin nimh atleast 6 cells, or a 2 cell lipo

A 7700 on 7 cells would be foolish.

The MM bearings would not last too long running at 65,000 rpm (as good as they are).

ur forgetting tho the jato is prety big, the 7700 wouldnt push it like a 4600 would on a 3 cell lipo

Gearing can "adjust" for the relative weight of the Jato E-Maxx Rocks. However the 7700 is better suited to lower voltages. That's one of the keys here.

i think emaxx is right, my bling 4 has the 7700, and i have geared up pretty high and in that light car it still heats the esc up pretty good so i think if he geared it down it would work but not very good.

Yes, and no.

Most high Kv motors heat up quickly, even under a light load. At 7.2v the 7700 will spin 55,440 rpm!

Compare that to the 4600 at 33,120 rpm for the same voltage.

The motor will naturally heat up with the additional voltage and related rpm. Consider the additional heat by the controller having to process 60% more and you can see why lower Kv motors with high Amp capacity batteries have an advantage.

pro, im bor at bros lol

yes gearing will, but at the right gearing and voltage it wont be very fast, well not as fast as it could be

i think he knows who you are.

I know. LOL!


A good analogy for anyone into 1:1 cars.....

The 7700 is like a Turbocharged 1.8 TOYota motor. in a small lightweight car appropriately set up its really fast, but put it into a heavy chassis or gear it improperly, etc. and it sucks big time.

That's why the guys who are most successful with their brushless MT's are using 1500 - 2200 Kv motors and higher voltage/cell counts to provide superior power, lower temps, and greater reliability. Much like a well built torquey V8.

Matching the Kv to your chassis and batter packs is VERY important. The 7700's are best suited to 4 & 5 cell touring cars. IMO.

I do! He's the "POSTMASTER"!!!!!!!!!!!!!!!!!!!

might even be related to ***RC*** LOL!

now this makes sense to me, good way to put it pro!!

like you said the other day he is from the south he is related to everybody.

Forgot about that! :026:

ha, but anyways i think he could maybe run the 5700 thats what all the pedes are running.

5700 would be ok on 6 cells the 4600 for 7 cells.

yeah, i want to try the 6900 in the bling 4.

yes, and u were sayin on this and cells it would be insane, but this is goin into a jato, so its 2 times as much wieght, with ALOT more rtational mass

yes i am related to everyone, its how i roll:018: :005: :013: :010: :027: :eek:

id still run the 4600, u need torque, then a 3 cell lipo would add som CRAZY torque and u could gear it up for SPEED :D

Right BOR aka E-maxx Rocks,

A 7700 would work with low voltage but it just won't work well.

A lower Kv motor is much better for this app.

Another 1:1 example.......

2007 Dodge Charger...........

Available with 2.7L (190hp), 3.5L (250hp), 5.7L (340hp), and 6.1L (425hp)

The car weighs 4100 pounds (roughy between 4000 and 4300 based on options)

The 2.7l moves the car around and is fine but not very powerful. Each step up gives more speed and BETTER acceleration.

The 7700 in the Jato is like the 2.7L in the Charger.....overworked!

A 4600/5700 is like the 3.5L Works fine Decent Acceleration

A Feigao 8XL would be like the 5.7L Runs Hard.

A NEU1512 or 1515 would be like the 6.1L Kicks Butt!

very nice comparison pro.

I guess I need to just get rid of the 7700. I've got no use for a touring car motor. I have no interest at all in onroad stuff. I was hoping to be able to use it in something offroad, but it's not looking good.

I bought the motor and the ESC barely used for about 1/2 price, so it was worth it for the ESC alone. Anybody want to buy a MM 7700kv motor? Got something you want to trade?

i have one in a b4 buggy and it does very good.

kody, that wighs half if not less then a jato, and much less roatational mass

Got a link for me?

You're running a 7700kv?

give me a pm and i can send you some pictures and stuff, yes i am running a 7700.

It doesn't neccessarily have to be a Jato. I just thought they look cool and that would be about what my budget would be. What ever I go with, I want to do a scratch build or maybe a kit. I haven't done that yet, should be interesting. I also considered a Dark Impact or a Rustler with a few upgrades.

I'm learning I enjoy building and working on them as much or more than running 'em.

a 7700 in a dark impact would do good the 7700 is for lighter off road cars and on road it does very good in my b4 it is very fast.

The DI looks pretty sweet too, I hear with a decent slipper and some shocks it's pretty good. Mike, ever made a DI slipper? :D

the parts is the only down fall to them.

Yeah, it's my understanding that it would take another $100 or so to make it stand up to the MM BL set up, plus a little suspension work to actually be competative.

probably true i am very lucky with my b4 i have not messed anything up in the tranny (knock on wood).