Overview
The HPI Racing Nitro Star F3.5 V2 Engine is a powerful 3.5cc (.21-class) big-block nitro engine designed for drivers who want strong acceleration, high top speed, and race-legal performance straight out of the box. Featuring updated internal and external design improvements, the V2 version delivers better cooling, reduced weight, and improved reliability for both racing and high-performance bashing.
This engine uses a rear exhaust layout and a slide carburetor, making it compatible with a wide range of 1/8 scale nitro buggies and truggies. The pull-start system incorporates a durable one-way bearing housed in a reinforced 14mm hex, ensuring dependable and easy starting.
Key Features
- Updated V2 crankcase and heatsink design
- Larger heatsink fins for improved cooling
- 22g lighter than previous version
- 4mm taller profile for enhanced airflow
- Rear exhaust configuration
- Tough pull starter with reinforced one-way bearing
- True ABC construction (chrome-plated brass piston/cylinder)
- Slide-type carburetor with two-needle adjustment
Performance Benefits
- Approximately 2.5 horsepower output
- Explosive acceleration and strong mid-range power
- High top-end speed capability
- Race-legal .21 displacement
- Improved cooling efficiency
- Reduced fuel vaporization with composite carb
Usage Notes
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Best Used With RC Scale(s): 1/8 scale nitro buggies and truggies
- Engine supplied fully assembled with pull start installed
- Exhaust system, clutch, flywheel, and glow plug not included
- Proper break-in required before full-power operation
- Compatible with standard .21 engine mounts and exhausts
Technical Specs
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Manufacturer: HPI Racing
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Part Number: 111600
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Displacement: 3.5cc
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Engine Class: .21 (race-legal)
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Power Output: ~2.5 HP
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Configuration: Big-block, rear exhaust
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Carburetor: Slide type, two-needle
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Internals: True ABC (chrome-plated brass)
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Starting System: Pull start with one-way bearing
What's Included
- 1x HPI Racing Nitro Star F3.5 V2 Engine with Pull Start
Summary
Race-legal .21 big-block performance with V2 design improvements — the HPI Racing Nitro Star F3.5 V2 delivers serious nitro power for 1/8 buggy and truggy builds.
