sorry, i am not familiar with nitro stuff.. try to find someone with bec you can borrow..

I am running a Hobao Hyper TT.

yes that will test it, infact alot of guys do that with the MMP up here. Did a cap help ?

What is the difference between version 2.0 and 2.1? Is it worth upgrading?

get v3 totally worth it.

I read somewhere that upgrading esc to turbo version is only for stock motors. I am running offroad 550 motors and 4 pole motors. Is there advantage for v3 for these motors?

No I got it for my 10.5 motor. It screams with the turbo and even if you disable turbo the timing adjustments are more from the older version.

i guess i'll just leave mine on older version since i don't even use a sensored motor now...so no timing needed.. and even with my old tekin 4.5 sensored, i barely ran timing, gets too hot..

Powered the servo and RX with a 5/cell nimh pack and it seems to work fine. Like I said earlier Im new to electric. Will a bec do the same thing as the RX pack did with less weight?

Can you even buy the v3 yet ?

Yes sounds like a bec will fix your problem, I cant believe that some of these have a weak bec. Mine worked great with a 7995 ?.

Guys, does rcecho sell legit hobbywing?

http://www.rcecho.com/xerun-4000kv-s...-lcd-card.html

One thing also...if your radio allows for travel/endpoint adjustment make sure and set it so servo is NOT pushing 100% right or left. Back it off 4 positions or so. this will help with current draw.

What receiver are you using?

A cap is just a battery so to speak. It keeps the receiver voltage from dropping below a certain point that causes the glitching/brownouts.

MMP and spektrum are the worst. I know guys running KO propo and MMP and have zero issues. Savox servos are also bad with spektrum. I understand this is a HW thing, but applies nonetheless.

I have this xerun 120A v2.1 with the latest stock software in my 2wd losi 22 1/10 buggy. I run it on 2s lipo with a speedpassion 10.5 turns ultra sportsman.

my buddy has a durango 4wd 1/10 buggy with a castle mamba max pro and a 6.5 turns motor.

on the straight away our topspeed is exactly the same, I can keep up with his 4wd buggy .

this is done on a hardpacked clay outdoor offroad track.

I just love this speedo.

I am having problems with program cards. When I plug it in, card turns on for split second and then off. Tried 2 different cards and both are doing this. So I thought it was lose wire, changed that out, put new plugs and still doing same thing. Everything works fine but cannot change settings on esc. Anyone have this issue. I have the 120a xerun. Do u think it's a bad bec that can cause this?