O.S. Engine OS-1A203 Speed B2101-TY Performance Engine with T2090-TY Header and Silencer  [OS-1A203]

O.S. Engine OS-1A203 - O.S. Speed B2101-TY w/T2090-TY Header and Silencer
Price:
CAD$760.23
Brand:
O.S. Engine
Model:
OS-1A203
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Refined Racing Heritage for the O.S. Engine OS-1A203 Speed B2101-TY

Built for hobbyists focused on lap times and consistency, the O.S. Engine OS-1A203 Speed B2101-TY combined with the T2090-TY header and silencer brings precision machining and a race-oriented power band to full-size 1/8 scale buggies. The components work together to deliver predictable throttle response on varied track surfaces.

Engineered for Track Reliability

The Speed B2101-TY is constructed for racers who need both dependability and strong midrange. It has a 3.46cc displacement and a rated output of 2.61 horsepower at 34,000 RPM, with a practical operating range from 4,000 to 42,000 RPM. The engraved crankcase and crankshaft details reflect tight manufacturing tolerances that help with balance and durability.

Track-Tuned Features and the 5.8mm Restrictor

This limited edition includes a bespoke 5.8mm carb restrictor developed for Ty Tessmann's championship setup, improving air flow for better low-end torque. Paired with the T2090-TY muffler and M2002SC manifold, the assembly is focused on boosting low to mid-range acceleration for tighter corner exits.

Specifications

  • Displacement: 0.211 cu in (3.46cc)
  • Bore: 0.646" (16.4mm)
  • Stroke: 0.646" (16.4mm)
  • Practical RPM: 4,000-42,000 RPM
  • Output: 2.61hp @ 34,000RPM
  • Weight: 12.42oz (352g)
  • Mounting Hole Centers (Same Side): 0.83" (21mm)
  • Mounting Holes (Opposite Side): 1.4" (37mm)
  • Height (Bottom of Mounting Tabs/Top of Cylinder Head): 3.2" (82.6mm)
  • Width of Mounting Tabs: 1.8" (45mm)
  • Distance from Backplate to Front Bearing: 2.5" (64.5mm)
  • Crankshaft Size: UNF1/4-28
  • Crankshaft Length: 1.2" (29.5mm) outside of engine
  • Carburetor Settings: Preset at factory, minimal adjustments needed

The O.S. Engine OS-1A203 Speed B2101-TY is a solid option for advanced drivers seeking a tuned nitro package; its custom restrictor and matched muffler help extract usable power without extreme tuning time.

What fuel and glow setup works best with this engine?

Use high-quality nitro fuel in the recommended percentage range and a reliable glow igniter; start with the factory carb settings and adjust the high needle only after break-in laps.

How difficult is tuning the Speed B2101-TY for club tracks?

Tuning is straightforward for experienced tuners thanks to factory preset carb settings; less experienced drivers should make small incremental changes and log results by RPM and throttle response.

Can the T2090-TY silencer be replaced with other mufflers?

Yes, alternative mufflers can be fitted but expect changes to backpressure and torque curve; if you swap, recheck needle settings and run-time temperature to dial it in.

What maintenance gives the best longevity for this engine?

Regular after-run oiling, checking crankshaft play, and inspecting the carb restrictor and exhaust for deposits will preserve performance and extend service intervals.

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