Just curious if anyone is running an 8.5 in an sc10, where are you geared? I'm at 18/87.

Could I get a set-up for my VTX10R with an 8.5 in my SC10? Running indoor clay, large track, 19-84 gearing.

Thank You...

What are you geared at? What profile are you on?

VIPER VST 8.5 SETUP
 

Some have asked for a setup with the VST8.5 in a SCT truck.

Here is what I ran 2 weeks ago and the truck was very good all the way around. It is a pretty soft setup, not aggressive at all, but the track was loose and rough.

Th 1.295 rol lout was with 88/21 gearing in the Losi XXX, so calculate accordingly for a SC10 or a truck with a different transmission ratio.

On the SC10, a 87/22 would be 1.283 (geared lower) and a 87/23 would be a 1.342 (geared higher)

I wonder why I have to adjust the PWM Frequency on an VTX10R ESC for different motors. My LRP SXX TC Spec V2 runs with motors from 5,5 to 17,5 withouth a problem - and without any user adjustment. It would be nice to get some values for different motors.
I run an orion 6.5 T in a durango DEX410 4WD and a LRP X11 9.5T in a 2WD SCT.
An auto PWM sensing mode would be very nice ;)

TopAs - you don't have too..... but everyone has a different feel or a different want for different applications. Regardless of car, I am about 4k or 5k when I run a 17.5 -- but I let a team driver drive my buggy and he said he would raise it if it was his car to smooth out the power. Lower wind motors I run higher freq. You can adjust as much or as little as you think will help you.

It is a parameter that is almost used as driver preference with how they want the "feel" of the motor, that and different applications like mod dirt oval can take advantage of it with how they tune the drive of the car off the corner.

I am running the stock spur and 14 tooth pinion.

I am running profile 5

I have ran this setup about 20 races without problems until this past Sunday.

jasontraci - Have you run it since it happen? Even just to try it out. One thing I have noticed as we move into warmer times is that even if you are close on heat, and you crash or stop for a few second, that head will build up an trip the thermal. Paul Sinclair had a battery terminal brake inside his battery at Motorama, caused his car to shut off, he borrowed mine the rest of the weekend - at least my batteries ran fast :sneaky:.

Its hard to say not being there at the track with you. Would be interesting to know if you tried it again - even up and down the street, to see if it worked correctly.

BTW, spend 25 minutes today trying to figure out why my new test esc would not program - only to find out I had it plugged into the wrong spot on the receiver -- I have been doing this how long.............:confused::ha::blush:

It's one more adjustment to help dial in your car. I have used this a lot and thank Viper for including it!

I was able to turn it back on and finish the race so it did work after it shutoff. I tried it again when i got home for a few minutes and it worked.

Wish I could tell you why it happen, glad to hear its running!!! :)

Sometimes these things just happen to the best of us...... let me know if you ever see anything else strange with it.

Hi All
i need some help with under standing PWM.
if i am running a 17.5 motor and have the PWM set at 6400 Hz what effect would i have if i change it to 16000 Hz or even down to 2000 Hz. does it change the torque or rpm of the motor through the Hz range or am i way off in logic.
can any one please explain.
cheers

Howdy. I'm looking into buying the viper copperhead 4500kv system for a slash 4x4. I was wondering what kind of runtimes I should expect using a 5000mah lipo.

I think more than likely it shut off due to heat. I run the SCTE, with a R.51 Copperhead (5150kv - I am assuming this is the motor you are running) and the truck has the Tuning Kit, TLR Chassis, etc... on it so it is a little lighter than stock, and running a 14T pinion with the Punch set at 2, and the Timing set at 1. With that setup, with good batteries (6000mah 65c) if I drive it hard, it will cut out momentarily.

The issue with the Copperhead motors is that they can pull allot of gearing. They can lug allot.

On the same track, I was better off wit a 13T pinion. The truck really wasn't any slower at all, and honestly, might have been a little faster with the lower gearing.

Also, running profile 5, it has the most aggressive settings. Brake is 10, punch is 7 and timing is 7. Even though the Copperhead ESC has a fan on it, it is possible to get it to shut down. It will try to protect itself. Settings that high will tend to just make heat unless you are geared down. Also, with a brake setting of 10, unless you are running on asphalt, is VERY aggressive. Aggressive brakes can contribute significantly to ESC temps.

If you do not have a ProGauge I would recommend getting one, it will let you refine the profiles more to your track and application. If you have no access to one, see if you can find one to borrow one. If not, change to profile 2 or 3.