Overview
The HPI Racing Nitro Star F4.6 V2 Engine is a powerful 4.6cc big-block nitro engine designed to deliver massive torque, strong acceleration, and blistering top-end speed. Best known as the powerhouse behind the Savage X 4.6, this engine is now available as a standalone upgrade for Savage-series and other big-block monster truck platforms.
The V2 update introduces a redesigned crankcase and cooling head with larger heatsink fins, improving cooling efficiency while making the engine 37g lighter and 12mm shorter. With 2.9 horsepower and an 8-port race-tuned sleeve, the F4.6 V2 delivers a huge powerband all the way to 32,000 RPM.
Key Features
- Updated V2 crankcase and heatsink design
- Larger cooling fins for improved thermal management
- 37g lighter and 12mm shorter than previous version
- Rear exhaust configuration
- Heavy-duty pull starter with reinforced one-way bearing
- 8-port race-tuned sleeve
- F1-7.5 composite slide carburetor (7.5mm)
- Optimized for Savage-class monster trucks
Performance Benefits
- Massive low-end torque for wheelies and hard launches
- Strong mid-range punch with extended top-end RPM
- 2.9 HP @ 32,000 RPM
- Aggressive power delivery
- Heat-resistant composite carburetor
Usage Notes
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Best Used With RC Scale(s): 1/8 scale Savage-class monster trucks (Savage X, Savage XL, etc.)
- Engine supplied fully assembled with pull start installed
- Exhaust system, clutch, flywheel, and glow plug not included
- Proper break-in and tuning required
- Compatible with standard big-block engine mounts and exhausts
- Recommended Glow Plug: Cold R5
Technical Specs
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Manufacturer: HPI Racing
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Part Number: 111595
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Displacement: 4.6cc
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Engine Class: .28-Class
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Bore: 18.68mm
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Stroke: 16.6mm
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Power Output: 2.9 HP @ 32,000 RPM
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Carburetor: F1-7.5 composite, 7.5mm
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Sleeve: 8-port race-tuned
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Starting System: Pull start with reinforced one-way bearing
What's Included
- 1x HPI Racing Nitro Star F4.6 V2 Big-Block Nitro Engine with Pull Start
Summary
Unleash big-block nitro power with the HPI Racing Nitro Star F4.6 V2. Massive torque, V2 design improvements, and proven Savage-class performance.
