The Arrma Mojave comes equipped with a capable 3600KV brushless motor, but serious racers may want even more power. With its heavy duty drivetrain, the Mojave can handle upgrading to extreme 4000+ KV motors. In this guide, we’ll recommend the best brushless motor upgrades to achieve insane speed.
Table of Contents
Introduction
The Arrma Mojave thrives on high voltage 6S-8S power systems mated to fast sensored brushless motors. Higher KV rated motors spin proportionally faster to increase torque and top speed potential. But motor selection involves balancing KV rating, power handling, and gearing.
Key factors when choosing a Mojave brushless motor include:
- KV rating – Affects torque band and top speed
- Maximum voltage – Must accommodate 6S+ LiPo configurations
- Physical dimensions – Correct mounting pattern and gear clearance
- Power output – Must handle 150+ amp electronic speed controls
We’ll suggest excellent motor upgrade options from leading RC brands to take your Mojave’s speed to the next level! Let’s dive in.
Key Takeaways for Mojave Motors
- 3600-4200KV motors provide strong 6S speeds with manageable gearing.
- 4000-4600KV options maximize speed but may require significant gearing and chassis upgrades.
- Select sensored motors for smooth low end throttle control.
- Match motors to 150+ amp ESCs and high voltage 6S+ batteries.
- Keep temperatures under control with external motor fans.
- Re-gear accordingly to optimize the powerband for speed or acceleration.
- Physically test motor clearance before installation.
Sensored Brushless Motors
Sensored brushless motors provide advantages of smooth throttle control and instant acceleration response. Great sensored motor options include:
Tekin RX8 Gen 3 4600KV Motor
- 4600 KV provides huge speed potential
- Rated for 6-10S LiPo use
- Includes turbo timing for strong top end
- Sensored for smooth low speed control
- Around $140 price point
The RX8 Gen 3 4600Kv has brute power for higher voltage setups seeking maximum speed.
Hobbywing XERUN G2 8.5T Motor
- 8.5 turns yields 4268 KV rating
- 260 amp maximum current
- More torque than equivalent KV sensorless
- Better low RPM controllability
- Around $140 MSRP
With competition level performance, the XERUN G2 8.5T excels on 6S-10S systems for incredible speed.
Hobbywing MAX10 SCT Sensored Motor
- 3800 KV well suited for 6S voltage
- 430 amp capacity handles 150+ amp ESCs
- Also available in 4200, 4600, and 5000 KV
- About $100 price point
The MAX10 3800 KV has huge torque focused for 6S Mojave setups while costing under $100.
Sensorless Brushless Motors
While not as smooth, sensorless motors are cheaper and also work well:
Hobbywing EZRun MAX10 4500KV
- 4500 KV for extreme power
- Sensorless operation to keep costs down
- 326 grams lightweight design
- $65 price tag makes it very affordable
The MAX10 4500KV combines an ultra affordable cost with strong speed capability. Great bang for buck.
O.S. Speed B2101 Sensored/Sensorless Motor
- 3652 KV rating specifically for 6S trucks
- Sensorless operation but sensored capable -Massive power output for blistering speed
- Around $150 MSRP
The B2101’s KV rating gives it a high torque bias for 6S Mojaves seeking gobs of wheel speed.
Tekin Redline Pro 4 Pole 4600KV
- 4600 KV for huge speed potential
- Rated for up to 8S LiPo
- Includes turbo timing for extra punch
- Improved 4 pole efficiency
- Around $120
While sensorless, the Redline Pro 4P 4600Kv won’t disappoint in the power department.
Important Motor Metrics
KV Rating
Higher KV yields more RPMs but may require more gearing. Good Mojave 6S KV ratings include:
- 3600 KV (stock)
- 4000 KV
- 4200 KV
- 4600 KV
Maximum Voltage
Ensure your motor can handle the battery voltage you intend to run – 6S, 8S, 10S, etc.
Physical Size
Measure inside your Mojave and double check motor dimensions and mounting holes align.
Power Handling
Select motors rated for at least 150+ amp electronic speed controls and high voltage batteries.
Supporting Upgrades
When running extreme motors:
- Beef Up Chassis – Brace chassis against torque twist or upgrade to aluminum.
- Drive Line Upgrades – Heavy duty axles, CVDs, etc.
- Quality ESCs – 200A+ ESCs with proper modes for various KVs.
- Batteries – High voltage 6S/8S LiPos to maximize power gains.
- Gearing – Optimize pinion size for speed or acceleration.
Take time on proper gear mesh, sensor connections, break-in, and tuning for safe operation.
FAQs
What KV motor should I choose for the Mojave 6S?
Good KV pairings for 6S voltage include 3600, 3800, and 4200. 4000-4600 KV provides huge speed but may require significant drivetrain upgrades. Keep KV lower if staying on 6S.
What motor upgrades work with the stock ESC?
The Mojave’s 120 amp ESC can safely support up to 4000-4200KV motors on stock 6S voltage. Beyond that requires an ESC upgrade to avoid overheating or failure.
Do I need a sensored motor for the Mojave?
Sensored motors are recommended for smooth throttle control. But an option like the MAX10 4500KV sensorless motor saves money while still providing great power.
Will motors for 1/8 buggies work in the Mojave?
Motors meeting the Mojave’s mounting pattern and gear spacing will physically fit. But truck applications need more torque bias. Opt for truck focused motors.
How do I mount a bigger motor in the Mojave?
Larger motors may require trimming the chassis for clearance. Use the stock motor mount holes and fabricate additional supports if needed. Ensure proper gear mesh.
Conclusion
Serious hobbyists can unlock tremendous speed and power potential upgrading the Mojave’s motor. Just be strategic in selecting KV ratings and gearing for your battery configurations.Brushless systems with 150+ amp ESCs take the Mojave well over 60 MPH on 6S.
While tempting, very high turn motors demand chassis and driveline upgrades to maintain reliability. Take time properly installing and breaking in new motors too. With a thoughtful power system upgrade, your Mojave will absolutely destroy previous PRs!