Castle Creations Ghost RC Perfect Pass RC Cobra 5 ACE & 1721 2400KV Motor Combo

**BEFORE PURCHASING - PLEASE READ ALL DISCLAIMERS REGARDING WARRANTY AND PRODUCT USE WARNINGS ABOUT THIS PRODUCT.**

THE DREAM COMBO FOR SPEED RUNNIG AND DRAG RACING

This is the ultimate power combo for serious speed-run and drag racers: the Cobra 5 ACE ESC paired with the 1721-2400KV Ghost RC motor. Together they deliver brutal torque, fast throttle response, and rock-solid stability at extreme RPM. The ESC’s unlimited power capability works perfectly with the motor’s Ghost-mode architecture for stronger pulls, higher top speed, and consistent performance under heavy load. If you want maximum power with no limits and no protections, this combo is the clear choice for your next record-breaking build.

Cobra 5 ACE ESC – Co-Developed by Castle Creations, Ghost RC & Perfect Pass RC

Introducing the Cobra 5 ACE - an unlimited, high-performance ESC engineered for those who live for speed runs and drag racing. Born from an exclusive collaboration between Castle Creations, Ghost RC, and Perfect Pass RC, this next-generation speed controller redefines what’s possible in RC performance.

Built to dominate straight-line speed and withstand the most extreme power setups, the Cobra 5 ACE delivers insane amperage capability, lightning-fast response, and BUILT IN PERFECT PASS LAUNCH CONTROL!! - making it the top choice for serious RC speed enthusiasts around the world.

WARNING - UNLIMITED ESC!

NO PROTECTIONS - EXTREMELY DANGEROUS 

NO WARRANTY!

Key Features:

⚡ Unlimited  Power – No restrictions. Run high-amperage setups with the 6 gauge power wires and push the limits without any compromises.

🏁 Speedrun & Drag Racing Optimized – Tuned specifically for elite top-speed builds and drag setups.

🧠 32-Bit Processing Power – Next-level throttle precision, faster response times, and smarter tuning.

❄️ Advanced Cooling Design – Built to stay cool under extreme loads with precision thermal engineering.

🔧 Castle Link Tuning – Fully compatible with Castle’s advanced tuning software for dialed-in performance.

🛠️ Built by the Best – A true three-way partnership: Castle’s electronics legacy, Ghost RC’s innovation, and Perfect Pass RC’s speed-run expertise.

The New Standard for ESCs

This isn’t just another speed controller - it’s the ESC that everyone will be chasing. Designed from the ground up by the people who live and breathe RC performance, the Cobra 5 ACE is your unfair advantage on the road, the strip, or the track.

If you want to go faster, run harder, and leave limits behind, the Cobra 5 ACE is your next upgrade.

1721 - 2400KV BY CASTLE CREATIONS & GHOST RC

The new GHOST RC 1721-2400kv motor is based on Castle's proven 4-pole sensored design and has been redesigned for GHOST MODE. Engineers have made improvements in reliability and performance for the speed run and drag racing communities.  The 1721-2400KV pairs perfectly with the COBRA 5 ACE, providing an incredibly powerful racing setup.

ENHANCEMENTS FROM PREVIOUS GENERATION: 

• Larger rear bearing to provide more support at higher RPM
• Longer output shaft (30mm vs 22mm on the previous version)
• Winding wires extend directly from the back of the motor, decreasing resistance.
• 8mm shaft extends the full length of the rotor, increase strength and balancing
• Stainless-steel wrapped rotor and ultra balanced shaft to protect in high RPM applications

This 2400Kv brushless motor from Ghost RC & Castle Creations is purpose-built for high-demand straight-line driving - whether you are chasing times in drag racing or pushing top speed in speed runs, this motor is manufactured with tight tolerances, consistent magnetic alignment, and a high-efficiency rotor architecture that maintains stability at extended full-throttle pulls. Perfect Pass RC brings this unit to our catalog for builders who want competition-grade hardware with clean, predictable, repeatable power delivery - without compromise.

Designed for Drag racing and Speed-runs only.

Key Features:

• Max. RPM: 90,000.
• 2400 KV without sacrificing torque.
• Beautiful robust construction: Built with a stainless-steel wrapped rotor and an ultra-balanced shaft to maintain integrity and stability at extreme RPM.
• Ideal for running up to 8s LiPo

Product Use Statements:

• This is an extremely powerful motor designed for advanced and experienced users ONLY!
• Below are suggestions for increasing your likelihood of success but it is not guaranteed.
• This is a VERY high RPM motor. Start with very conservative gearing (small pinion/large spur).
• Check your data logs, temperatures and setup closely after each run to ensure you are not stressing components.
• This motor is intended for single passes only; allow time between runs for the ESC and motor to cool down to ambient temperatures.
• This motor can pull very high amperages. Make sure your batteries, connectors and soldering are capable of handling the loads. Inadequate power can cause poor performance and damage the batteries and/or ESC.
• Do NOT free rev the motor with no load, particularly when running 6s or higher. The RPM output of the motor is much higher with no load as the kv and battery voltages do not drop.
• Set ESC timing to Lowest (0). This motor will pull considerably more amperage as you increase timing. This does not necessarily equate to more speed as it puts more strain on the batteries and causes the voltage to sag. Less is more sometimes.
• Do not exceed 33.6v when using this motor.
• Be sure your pinion and motor bullets are secure before and after each run.

WARRANTY:

Due to the abusive nature of drag racing and speedrun setups, Castle is not liable for incidental or consequential damages to other equipment such as ESCs and batteries when using this motor and is not responsible for failures resulting from abuse, improper installation, misapplication or alteration, NO WARRANTY!

WARNING:

Drag and speed run setups are inherently abusive and extremely hard on all electronic components. Every component in the configuration can be strained, weakened (or worse) without using extreme caution, observance of electric theory and advanced knowledge of all aspects of the RC hobby. High speed runs and drag racing are the most advanced, aggressive and volatile applications in the RC car hobby. Improper setup or use of this product can result in catastrophic failures of the motor, ESC and/or batteries and yourself!