Hi guys,

Why throttle pwm frequency is standard on profile 2?

I don't know, i think nikos said that for the lower turn motors, use a higher PWM. and for higher turn motors, use a lower PWM
what motor are you using?

guys went well a week ago with my viper powered rb5. Loving the car and the esc. (i'm Will Latimer BTW)

OMG - Congrats - nothing like going fast are the raceday goes on --- feels good!!

Dave - do you mean what Frequency is standard with Profile 2? 12,000, but its adjustable - like they mentioned. Its also a "feel" thing, some like a smoother feel, others like more aggressive.

Thanks, and yes I did mean which was std!

ok, question for a local guy. he is runing the vtx10r with 550 4.5 viper motor. Geared with a 13t pinion in a Losi SCTE 1.0.

The esc is around 140ish and the motor is like 175ish and it hitting the motor temp cutoff of 190 deg. He is running profile 2 with the punch lowered to 70%, the throttle pwm at 5k. And he turned the timing down to 0deg on the motor. The is still hitting the motor thermal cutoff in a 8 minute race. Any ideas which way to go? The system is the BE and is brand new. not sure that maters, lol.

If its any assistance in helping this guy out, I run an SCTE 1.0 with a Tekin Pro4 4000kv with the same 13t pinion on a med/small indoor clay track and I am at about 150 after an 8 minute race. The 175 seems pretty dang hot. I could be wrong about this but doesn't he lower throttle PWM increase motor temp but lower ESC temp? His ESC seems pretty hot too.

higher PWM: lower motor temps, higher ESC temps (its more work for the ESC to put power to the motor)
lower PWM: higher motor semps, lower esc temps. (more stress is put on the motor due to the faster application of power to it)

I would say bring the PWM up to 9.6k or 12k, and see if that cools it off a little.
The temp cutoff reads about 30 to 40* before the external reach that temp setting due to that sensor is internal core temp.
set it to 210 or 220.

yeah, I suggested 210-220 om the esc for the motor temp. He wants to leave it at factory defaults and he is more comfortable with the setup. He does not want to fry a new motor/esc. So a higher pwm cools off the motor? but heats up the esc..hmmm

Ok, im having a head scratching problem. I emailed viper and called tech support on this. I have a tekno sct410 with a viper vtx8, tekin pro4 4600, and a savox 1258, at first i had a 15 tooth pinion on it and when i would accelerate hard the esc would reset, wait 10 sec and then run again, so thats when i called viper, now im running 50% punch(was 80%) and put a 13 tooth pinion on. It still resets under hard acceleration. If i dont pull full throttle and ease into it, it runs fine. Am i missing something in setting this thing up? Oh im in the right profile (#3) 2s 4 pole. So thats not it.

Durocken - the esc is pushing more power than the motor/battery can handle. What happens is the battery power is transferred to the motor, which pulls a crazy spike in amps (because VTX8 is capable of pushing a good bit of power), which lowers battery voltage - hitting low voltage cut off, causing he reset. Seems to be related mostly to that type of motor. Lowering Punch helps in some circumstances, you can also lower battery cut off (under the Protection tab), to see if you find a happy medium there. Doesn't seem to happen as much on 2 pole motors (like our VST) or other 4 poles (even lower kv ones from that company). We are looking into some other changes that can help effect it, but its harder to test when its not our motor we see the issue with.

Wildcat - also have him check he temps as he is running, if it heats up quickly, if could be related to gearing as well.

Great weekend for Viper products:

- Mark Smyka win 1/12 17.5 class at ROAR Nationals - Viper's 1st On-Road National Championship and second overall (both in 17.5 classes - I see a pattern there..)

- Travis Amezcua is in 2wd Mod Buggy, 4wd Mod Buggy and 4wd SC A Mains at the Cactus Classic. An A Main in every class he ran, note - Travis needs to run more classes.......

- Royce Berrio TQ's 2wd Buggy 17.5 and SC 17.5 at RCHR 5th Anniversay race in Waterbury CT. He wins SC going away, big lead in 2wd until he loses a tire (fire that mechanic). More great 17.5 results.........

Great weekend!!! Thanks to all the drivers, and customers using Viper Products everywhere. :tire::tire::tire:

How do you guys think the vtx10r and the vst4.5xl would do in the tekno sct410?