O.S. Engines Hits the Road With Speed R2101 1/8 Scale Mill

Apr 02, 2014 No Comments by

If you like your nitro power mixed with foam tires and pavement, O.S. Engines’ latest mill is all you. The Speed R201 is based on the red-hot 21XZ-B Speed Spec II (as used by Ty Tessmann to win The Dirt Nitro Challenge), and tuned for high-revving road action. Full press info from O.S. below.

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Speed R2101Engine

 

A BIG boost in performance for 1/8 scale on-road!

Take the winning heritage of the 21XZ-R, combine it with the 21XZ-B’s superb features and what do you get? The Speed R2101: the top choice for 1/8 scale on-road! Its specially designed 7+3 port cylinder liner ensures smooth acceleration, great power and improved economy. The DLC coated crankshaft comes with pressed-in weights and is silicone-ported. The crankcase is a new design that provides efficient fuel flow from intake to exhaust. Sporting laser-etched Speed Tuned graphics, the Speed R2101’s machined outer head results in improved cooling and a lower center-of-gravity.

Features

- Shares many of the 21XZ-B’s extraordinary features, applied to competitive on-roading.

- Builds on the winning heritage of the 21XZ-R.

- Newly designed 7+3 port cylinder liner ensures smooth acceleration, great power at maximum rpm and improved fuel mileage.

- DLC coated crankshaft, pressed-in weights and silicone-ported.

 Specs

Displacement: 0.213 cu in (3.49 cc)

Bore: 0.633 in (16.08 mm)

Stroke: 0.677 in (17.2 mm)

Practical RPM: 4,000-45,000

Output: 2.7 hp @ 33,000 rpm

Weight: 11.99 oz (340 g)

 

 

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I've been involved in RC for over 25 years, and first joined Air Age Media in 1997. I served as Executive Editor until 2008, when I went to work on the manufacturing side of the RC biz. Now back at RC Car Action, I'm thrilled to be doing what I love most--not just enjoying RC, but sharing it with all of you. In addition to RC, I enjoy spending time with my beautiful wife Kathleen and our wonderful daughter Audrey.
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