Surpass Hobby 3660 3250KV Brushless Inrunner Motor – 5 mm Shaft, Black

Surpass Hobby SP‑036600‑09 S23E04 3660 3250KV Brushless Inrunner Motor – 5 mm Shaft, Black & Red

The SP‑036600‑09 S23E04 is a compact, lightweight, and fast‑revving 3660‑size 3250KV inrunner designed for high‑performance RC use across 1/10–1/8 cars and medium‑size EDF aircraft. Its 4‑pole rotor, hardened 5 mm shaft, and black‑and‑red aluminium housing give it the strength and efficiency needed for demanding setups. With a maximum current rating of 70 A, maximum voltage of 17 V (4S LiPo), and maximum power of 1200 W, this motor delivers a lively, responsive powerband while keeping weight low at 251 g. Pre‑installed 4 mm gold bullet connectors ensure compatibility with most high‑current ESCs.

Performance in RC Cars

The 3250KV rating gives this motor a fast, high‑RPM character ideal for lightweight 1/10 and mid‑weight 1/8 builds. Its 70 A current ceiling and 1200 W output allow strong acceleration and excellent top‑end speed on 3S–4S LiPo. This makes it well‑suited to:

• 1/10 on‑road touring and drift cars
• 1/10 rally and buggy platforms
• Lightweight 1/8 GT and buggy builds
• Speed‑run setups where high RPM is preferred over brute torque

The 3660 can size keeps weight down while still offering enough thermal mass for extended running.

Performance in EDF Aircraft

The electrical limits and inrunner design make this motor a strong match for medium‑size EDF systems that require high RPM and efficient airflow. Its specifications align well with:

• 70 mm EDF units (ideal match)
• 80 mm EDF units depending on rotor load
• Lightweight single‑EDF jets
• 3S–4S EDF setups needing high KV and strong RPM

The 5 mm shaft fits many 70–80 mm EDF rotors, and the 17 V max voltage matches 4S EDF power systems. The 1200 W power rating provides enough thrust capability for fast, responsive flight without excessive heat buildup.

Key Features

• 3660‑size brushless inrunner
• 3250KV rating for high RPM and responsive throttle
• Maximum current: 70 A
• Maximum voltage: 17 V (4S LiPo)
• Maximum power: 1200 W
• Weight: 251 g
• Pre‑installed 4 mm gold bullet connectors
• 5 mm hardened steel shaft
• Black and red aluminium housing
• 4‑pole rotor for efficient torque delivery
• Suitable for 1/10–1/8 RC cars and 70–80 mm EDF jets
• Ideal for 3S–4S high‑RPM applications