ULTIMATE ENGINE M3R & 2141-F PIPE COMBO

ULTIMATE ENGINE M3R & 2141-F PIPE COMBO

ULTIMATE ENGINE M3R & 2141-F PIPE COMBO

Price 389,99 €

Product code: UR3401-M3RP41

Product info:

This is the 3 port .21 Off-Road Ultimate M3R Competition Engine & Ultimate 2141-F Pipe Combo.

After launching the M3S engine back in September 2017, Ultimate Racing presents its last creation, the M3R.

Like the M3S, it’s a 3 transfers OS based engine, with the same configuration and power than its predecessor.

Unlike the M3S, the M3R incorporate the following parts:

- High precision steel rear bearing made in Japan.

- Balanced crankshaft with tungsten weight and silicone filling.

- 6.5mm plastic venturi.

The M3R, like the M3S, is a long stroke, high torque and extreme power engine with low fuel consumption. Produced with the guaranteed OS quality, the M3R is a cheaper option with the same power and performance.

COOLING HEAD

The cooling head has been redesigned by Modelix. It’s not as low as the B2102 lower profile but it’s lighter so it keeps the center of gravity as low as the B2102 but improving its performance on very high temperatures. It’s the same head as the M3T and M3S engines.

CARBURETOR

The Ultimate M3R engine comes with the same carburetor than the M3S and M3T engines where high speed needle holder has been redesigned for a better refrigeration of the fuel flow into the carburetor, lowering the temp of the carb, and as a consequence it’s more stable with a great idle stability, improves fuel mileage and overall engine performace.

Besides this, the uniball joint of the carb slide has also been modified with two stoppers instead of one. With this new modified design, you can easier adjust the angle of the uniball joint without having to disassemble the engine.

This carb offers a higher accuracy tuning, a very interesting advantage to experienced drivers.

BACKPLATE

The backplate is CNC machined and made of 7075-T6 Swiss Aluminum. The reason of making it with this material is to make it harder than the original and reduce the conrod-backplate friction increasing the life of the conrod and improving engine efficiency and performance.

Thanks to its design, you can remove the backplate without damaging the conrod even when it is on its lower position (PMI). The lateral grooves allow to easily remove the backplate without having to use any tool that can damage it.

CRANKSHAFT

The M3R crankshaft has been designed by the O.S team of engineers to ensure an optimum flow of fuel thanks to the aerodynamic design and the silicone filling. It is balanced with a tungsten weight in order to increase the inertia to rotation.

BEARINGS

In line with the high quality and performance of this engine, its two high precision made in Japan bearings ensure high idle stability, longer life and low friction at high temperatures.

VENTURIS

The engine is supplied with a 6.5mm plastic venturi.

SLEEVE AND PISTON

The sleeve with 3 inlet port and an exhaust port guarantee a low fuel consumption with a very high but smooth and linear power.

Both, the sleeve and piston are made from a high strength aluminium bar to improve its durability.

PIPE

This is the homologated EFRA 2141 Off-Road Super Strong Pipe Set with Fast-Lock System Manifold from Ultimate Racing. This hi-quality aluminium exhaust is an evolution of the previous 2141 version which incorporates the Fast-Lock system and the location of the pressure tap has been modified for better performance providing:

- Improvements to the power curve.

- Higher top speed.

- Better fuel mileage

This exhaust system provides a precise and linear throttle response in the low to mid RPM range with a great top end speed. This pipe set will provide great power to your engine up to the high RPM range to produce a great and easy to drive power curve.

All these characteristics will provide great torque for those very demanding tracks with sharp corners and hard to clear jumps.

This pipe set incorporates the FAST-LOCK system for connecting the exhaust pipe to the manifold without the pipe/manifold springs. This FAST-LOCK connecting system is stronger and safer than the traditional springs system, it ensures perfect pipe-manifold alignment and improves engine performance.

Assembly and operation are very easy. The manifold is fixed to the pipe by turning a quarter turn. The manifold comes with an inner silicone O-ring and an outer silicone gasket that ensures a perfect sealing. We suggest lubricating the O-ring/gasket with a drop of after run oil when assembled for the first time.

This exhaust system includes the pipe, the manifold with O-ring and gasket seals, 2 medium springs, 2 long spring and 1 manifold gaskets.

TECHNICAL SPECIFICATIONS

Displacement: 3,46 cc

Power Output: 2.75 PS/2.71 hp @ 34.000rpm

Practical Range RPM: 4.000-44.000

Bore x Stroke: 16,27x16,80

Sleeve: 3 + 1 ports

Rear Ball Bearing: steel

Front Ball Bearing: steel

Crankshaft: 14 mm

Carburetor: Aluminum w/ insulator gasket

Glow plug: P3 Turbo

Exhaust Position: rear

Weight: 345g

Fuel type: 25% nitro. Recommended fuel Nitrolux

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