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NOVAROSSI Novarossi KEEP OFF 21-4 Engine .21 Off Road 4 Port Turbo w/ Rear Patented Ceramic Bearing

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$339.99
SKU:
NVRKEEPOFF21-4
UPC:
730679
Availability:
This item is discontinued or no longer available.
Weight:
1.50 LBS

NOVAROSSI Novarossi KEEP OFF 21-4 Engine .21 Off Road 4 Port Turbo w/ Rear Patented Ceramic Bearing

$339.99

Novarossi KEEP OFF 21-4 4-Port .21 Competition Off Road Engine. The KEEP OFF includes all the tricks and tweaks that Novarossi has developed for their off-road engines, most notably a unique and patented bearing design that reduces the inertia of the rotating mass and increases the engines scavenging, delivering increased throttle response and higher top speed. This, combined with a factory tuned crankshaft, and 4-port sleeve deliver the best combination of linear power delivery and minimal fuel consumption possible. Additionally, the Evolution 2 cooling head was chosen to keep the cooling head mass as low as possible, and the re-designed exhaust gasket helps to increase the life of the gasket.

Features:

  • Cooling Head: The 'Lighter & Lower Evolution 2' cooling head has been drilled and milled out to reduce the mass of the cooling head, lowering the Center of Gravity of the engine/car.
  • Sleeve: The sleeve has 4 transfer ports, the best option to provide linear power with minimal fuel consumption.
  • Crankshaft: This engine is "Factory Tuned" and features a modified crankshaft to further improve the power output and driveability.
  • Gasket: The inner shape of the gasket has been redesigned to allow the use of more material and when combined with an updated material is more resistant to high temperatures.
  • Conrod: The R7 conrod is machined from a super light aluminum that has been checked ultrasonically. The unique shape of the R7 rod creates less turbulence inside the engine.
  • Backplate: The shape of the rear cover helps to optimize the crankcase filling and reduces dead space. The steel plate helps to reduce friction and increases the life of the rod.
  • Carburetor: The plastic carburetor is a "reverse" type with a sliding throttle valve.
  • Rear Ball Bearing: The ceramic rear ball bearing reduces the inertia of the rotating mass and increases the engine's scavenging ability. The bearing, combined with the re-designed case provide increased throttle response and higher top speeds.

Recommended Tuned Pipes: 51006M, 51016, 51020M
Recommended Manifolds: 41021, 41029, 41030

Recommended Glow Plug:

  • C5TGC: For ambient temperature - 32ëF/50ëF (0ëC/10ëC)
  • C6TGC: For ambient temperature - 50ëF/77ëF (10ëC/25ëC)
  • C7TGC: For ambient temperature - 77ëF/104ëF (25ëC/40ëC)

Specifications:
Displacement: 3.49 cc
R.P.M. (max power): 36,000 RPM
Practical Range: 6,000-38,000 R.P.M.
Bore x Stroke: 16.26x16.80 mm
Sleeve: 4 ports
Rear Ball Bearing: ceramic
Front Ball Bearing: steel
Crankshaft: 14 mm - turbo - tuned
Carburetor: plastic - 9 mm - reverse
Glowplug: Turbo (C6TGC)
Exhaust Position: rear
Weight: 360g
Fuel type: 25% nitro

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Wallie builds is the top option for any racer looking to have the best available car at the track. These kits are built to be winners and give you the best opportunity for wins and podiums.

- Wallie Builds will cover shipping charges to anyone in the US.

- Once the sale leaves beachRC and arrives at Wallie Builds we will take full responsibility for the order.

- Anything with the build will be handled by Wallie Builds.

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