The Best Engines

Nitro Star 12R SS Pullstart
#1627

Our latest Nitro Star engines are a leap forward from our previous designs! Each one of our new engines put out over 1 horsepower, so you'll have all the power you need at your fingertips!

Our new 12R line of engines uses a high-tech Nickel-Silicon Carbide coating that is being used in many high performance applications by companies like Jaguar. The Nickel bonds to the surface, the silicon lubricates, and the carbide gives extremely long wear. The new Carbide coating in the HPI 12R SS and 12R SC engines, you will see many improvements over standard chrome coatings:

• 2 to 10 times more durable than chrome
• 50% higher heat capacity
• Superior lubrication retention
• Better for the environment (no mercury is used during manufacturing)

This is the rotary carb, nonpullstarter version of our new Nitro Star 12R engine. From the 5.5mm opening to the ABC construction inside the black engine case, this engine is all about speed and power! A tall purple anodized aluminum heat sink keeps everything cool, while the traditional side exhaust routing will fit any Nitro car or truck.

This is a highly advanced, reliable and powerful engine that will fulfill all your racing and hobby needs!

For more details about the new Carbide coating used in the new HPI 12R SS and 12R SC engines, see these links:

US Chrome

Nickel Development Institute

Nitro Star 12R SS Engine Tuning Sheet

Nitro Star 12R SS Exploded View and Parts List

* These figures are estimates from the manufacturer of the engine. Like most R/C car companies, HPI purchases engines from model engine manufacturers, we do not have a testing lab or dyno to rate our engines

Nitro Star 15SC
#1610

The features of this engine include: aluminum case, machined aluminum heat sink head, chro-moly crankshaft with ported air intake, slide carburetor for faster reaction with high-end and low-end needle valves for tuning. The carb has a 5.5mm opening for increased airflow and an idle stop screw.

Nitro Star 15SC Engine Tuning Sheet 

Nitro Star 15SC Engine Exploded View and Parts List

click here to see how to install the 15SC engine!

Nitro Star 15FE
#1615

Recent improvements made to the Nitro Star 15FE engine:
The carburetor opening was increased from 4mm to 4.6mm
Increased flywheel sleeve thickness to prevent any piston/sleeve wear (flywheel included with kits that feature the Nitro Star 15FE)
Thicker nickel plating on sleeve
Forged piston for better tolerance
Clutch shoe material changed in RTR Nitro RS4 and Nitro RS4 2 kits for less chance of melting
Added notations and troubleshooting advice to prevent clutch shoe melting

Nitro Star 15FE Engine Tuning Sheet 

Nitro Star 15FE Engine Exploded View and Parts List 

* These figures are estimates from the manufacturer of the engine. Like most R/C car companies, HPI purchases engines from model engine manufacturers, we do not have a testing lab or dyno to rate our engines.

Nitro Star Pro 21R SC Statistics

The perfect fit for your Proceed

The Nitro Star Pro 21R SC is designed in Italy by engine manufacturer Novarossi, winner of multiple world championships with their .15- and .21-size engines. This engine was designed just for HPI, so this isn't just a rebadged Novarossi engine! HPI Racing is the only company in the world to have these specifications from Novarossi.

The Nitro Star Pro 21R SC is an ABC engine, and is made in the tradition of Novarossi's .15 and .21 world championship winning engines. The engine is made with an aluminum case and piston, with a chrome-plated brass sleeve. This is the standard construction for all high-performance engines. A machining process developed from the aerospace industry is used to construct the engines for virtually zero flaws in the metal. The crankcase is vacuum-cast to lessen the probability of defects, such as density voids (spots of low density in the metal which can cause a weak point). The nine ports of the engine are profile cast for perfect alignment with the sleeve, unlike other engines which have the ports machined in after molding.

Resting on special Novarossi-designed ball bearings (patented) is a large 14mm diameter crank shaft, which gives the absolute maximum flow of fuel and power with a minimum of flex. The connecting rod uses a unique double bushing design, and is made from super-competition aircraft aluminum alloy for lightweight strength.

The race-bred slide carburetor is an extremely smooth unit that provides smooth throttle control with a super-fast reaction time! The 9mm opening allows more air into the engine for massive power. The three adjustment screws allow fine-tuning of low-speed, mid-range and high-speed air/fuel mixtures. This is a top-quality carburetor, designed for serious racers!

To maximize engine cooling, the combustion chamber and gray anodized cooling head are a two-piece design. This will ensure that the Nitro Star Pro 21R SC runs cool and efficient, for low fuel consumption and extreme engine power!

The Nitro Star Pro 21R SC comes with a sheet of Nitro Star Pro decals, slide carb, gray anodized aluminum head, and full, easy instructions for installation, break-in and tuning. Be the envy of all your Nitro racing buddies! Get ready for max speed for your Proceed racing car!

Click here for the exploded parts view and parts list!

Designed and manufactured by Novarossi in Italy, this .21-size engine is a Nitro powerhouse!

This is the Team Orion Wasp .12 Roar Engine with Slide Valve Carburetor.

FEATURES: True ABC construction, aluminum piston and chrome plated brass cylinder liner. Three larger cylinder intake ports instead of two smaller intake ports, add 40% to 45% increased port volume over the original CVs. The third port points directly at the exhaust port, making exhaust scavenging more efficient. More air/fuel mixture with more efficient flow equals more horsepower. Crankshaft is 1mm larger in diameter. This allows for a larger crank port feed and smoother mixture flow. Bearing to crankshaft fit is tighter, increasing vacuum, crankcase pressure and reduced oil discharge from the front bearing. Front and rear ball bearings are thicker and have larger balls inside that are better able to handle the increased loads. Connecting rod is machined aluminum instead of original CVs cast- aluminum rod, and it has larger ends with bronze bushings in both. Wrist pin is held in by C-clips instead of nylon buttons for reduced friction. Side exhaust Slide #10C 2-needle carburettor Black/Silver horizontal 9-fin cylinder head

INCLUDES: One Assembled .15CV-R Engine with #10C Slide Valve Carb. One Super 102 Air Cleaner with 3 Blue Foam Elements One Set of Instructions w/Parts List and Decal Sheet One #8 Glow Plug (OSMG2691) Two engine mounting blocks Four 3x14mm mounting screws

REQUIRES: Muffler (exhaust system) depending on vehicle Starting equipment Fuel: 5% - 20% nitromethane content Most of the fuels we carry meet or exceed the lubricant content required for optimum performance and maximum engine life. In the past, the conventional lubricant content used in fuel was 18%. But with new advanced technologies, fuels like Red Alert and O'Donnell for example, have a better quality of lubricants even though the percentages of lubricant content are lower. These high-tech lubricants provide exceptional cooling and protection.

SPECS: Displacement: 0.152 cu in (2.49cc) Bore: 0.598" (15.2mm) Stroke: .0539" (13.7mm) Output: 1.2 ps @ 31000 rpm Practical RPM Range: 4000-36000 Weight: 6.88/6.82oz (195/193.2g) Crankshaft size at threads: 0.196" (5mm) Distance between mounting holes same side: 0.43" (11mm) Distance between mounting holes opposite side: 1.24" (31.4mm) Distance/top of cyl.head to bottom of mounting flange: 2.80" (71.1mm) Distance between muffler mounting holes: 1.08" (27.5mm) Height/bottom of crankcase to top of cylinder head: 3.30" (83.9mm) Width between mounting flanges: 1.54" (39mm) Width of crankcase beneath mounting flanges: 0.98" (25mm)

COMMENTS: Some notes on slide valve and rotary carburetors. Rotary carbs offer a larger response in the middle of the engine's power band. This works well for off-road applications when throttle response must be varied. Slide valve carbs provide greater response at the beginning and end of the power band. This works well for on-road and racing applications demanding fast take-offs and high speed. This engine features a "standard" crankshaft length. kh01-17-02 upd NNA03-27-02 ir/kh updt jxs 3/20/03

This is the Trinity/Picco .12 Rear Exhaust Pro Racing Car Engine with a
                              Rotary Carburetor.

This is the Picco/Trinity P12 .12 Picco Round Side Exhaust Engine
                            with Pull Starter.

Thanks to Towerhobbies, Fantom racing for pictures!!!