Originally Posted by
flo006
Hi everybody, i m new in this forum...
I just bought a viper combo with vtx 10 esc and 8.5 motor to put in my xfactory x6. my problem is that the motor is very low I have no power (impossible to jump the double at my club when all my friend with speed passion and lrp 8.5 motor jump it easily) . my motor ran like a 10.5 or 13.5 with 23 pinion (I read good ratio is approximatively 9) the motor begin to work correctly with a 28 pinion (ratio 7.2) but with this ratio the motor temp is too high and power is not awesome.
that s my esc setup :
VTX10-Profile#2
Brake strength 80%
Brake PWM freq 8000HZ
Brake curve linear
Neutral drag brake 5%
Throttle PWM freq 9600Hz
Throttle punch 90%
Throttle curve linear
Deadband middle
no timing- default
no motor protection
no esc protection
Is it normal ? good motor for 2wd buggy is 6.5 with viper product ?
thank s for your advice and i hope my english was not too bad...
Hello Flo006,
Your English was fine
I think I can help you out. First off, where are you running your X - 6? If you are on a dirt track, I'd start at 22/81 with a VST 8.5 motor, which is a 9.57 final drive ratio. On astroturf or grass I can't recommend a specific gearing, but I know gearing is usually a bit higher than dirt because the tires are smaller and lighter. Generally, I would start one pinion tooth smaller than what others are running LRPs at. The final drive ratio of an X - 6 is the same as a B4 or B4.1
I think the motor feels slow because you are not running any timing. When I first ran the Viper equipment I experienced the same thing you did - without the timing added I lacked power, so I geared up and that made things too hot. I added the timing back in and things got way better. Here are my settings for the VST 8.5:
Brake strength 88%, Frequency 5000 Hz, Curve -Exp2
Throttle punch 100%, Frequency 5000 Hz, Curve Linear
Deadband Narrow
Drag Brake 8%, Dynamic Brake 0%/disabled
Acceleration Boost: start 7500 rpm, finish 23000 rpm, max timing 20*
Top Speed Timing: slew rate 8*/1000 rpm, max timing 18*
I've attached all that in a set-up sheet to this post; this set-up was very easy to drive out of the corners, and really comes alive in the mid- and high-end powerband. I would adjust the drag brake % and top speed timings to suite the track.
Hope that helps, let me know if you have any more questions!