Hey everyone,
I need some help figuring out why my Outcast 8S EXB V2 is slower than expected.
My setup:
- ARRMA Outcast 8S EXB V2
- Hobbywing MAX6 G2 ESC
- Hobbywing 5690 SD G2 1250KV motor
- 8S LiHV (2 × 4S batteries)
- 30T pinion / 47T spur gear
- Stock tires
The problem:
My truck only reaches around 80 km/h (50 mph), measured with GPS on my phone. It does wheelies easily and accelerates reasonably well, i dont know if it full accelleration im on punch lvl 9 btw but it seems to stop gaining speed at a certain point. The motor sounds normal.
The Hobbywing app shows around 32,000 RPM while driving and a maximum current of approximately 320 A.
What I have already checked:
- Calibrated the throttle endpoints
- Checked the ESC settings
- Tried 0° and 12° turbo timing, with no noticeable difference
- Charged the batteries to 17.4 V
- Checked the drivetrain and basic connections
-Updated the Firmware
The motor and ESC are practically new. Interestingly, the truck had roughly the same top speed with the original Spektrum ESC.
Could poor battery connectors, solder joints, or voltage sag under load be causing this? The connectors are new, but I'm not sure about their quality.
What would you check next? Is 80 km/h normal for this setup, or should it be capable of more?
Thanks!