O.S. Speed 21VZ-B V-Spec Off-Road Competition Buggy Engine (Aluminum Head)

O.S. Speed 21VZ-B V-Spec Off-Road Competition Buggy Engine (Aluminum Head)
Price: $469.99
Discontinued Online
This item is discontinued and no longer available for purchase. You may want to search our site for a similar item.
This is the O.S. SPEED 21VZ-B V-Spec Off-Road Competition Buggy Engine with Aluminum Heat Sink Head. The O.S. SPEED 21VZ-B V-Spec is the second in a line of factory tuned engines to utilize the O.S. SPEED brand name. Among the many special features incorporated in the O.S. SPEED 21VZ-B V-Spec engine are a black anodized finish crankcase, an Aluminum heat sink head which transfers heat away from the crankcase more efficiently, for more consistent cooling, a specially coated crankshaft, a ceramic bearing and a Tungsten weight pressed into the crankshaft counterweight for added balance and smoother operation. These features in conjunction with a double adjustment carburetor result in an engine that under such exacting conditions, reaches the pinnacle of World Competition. This secret weapon will be sure to catapult your 1/8th Scale Off-Road Buggy into a World Class vehicle.

The prototype O.S. SPEED 21VZ-B V-Spec engines were used by three drivers placing 1st, 2nd and 4th, thus proving the high potential of the base engine, the MAX-21VZ-B V-Spec. Additional timing and factory modifications have been made to produce the maximum performance O.S. SPEED brand engines.

Features that influences the outstanding performance of the factory tuned O.S. SPEED 21VZ-B V-Spec engine.
  • A special DLC coated crankshaft with a pressed in Tungsten disc in the counterweight for improved balance and a lower level of vibration.
  • A special T-2060WN tuned silencer developed especially for the Speed 21VZ-B V-Spec engine utilizes a welded on pressure nipple (Tuned pipe not included - sold separately).
  • Precision ceramic ball bearing is incorporated which greatly reduces frictional losses -the same type of bearings that are used in full size racing car engines.
  • Three carburetor venture inserts are available in 7, 8 and 9mm throat diameters. The inserts have a red anodized finish - the O.S. SPEED brand color with throat diameter laser marked on each insert.
  • Aluminum heat sink head that transfers heat away from the crankcase more efficiently, for more consistent cooling.
  • Now you can select the high-performance .21 VZ-B V-Spec with your choice of heat sink head: lighter weight magnesium, or cooler aluminum!
  • Hardened, chrome-plated, 4-port, cylinder and liner for high durability and long life
  • Machined steel piston features parallel rings that trap fuel oils and use them as a seal to enhance compression and boost power
Displacement: 3.46cc(0.211cu.in)
Bore: 16.6mm(0.653in.)
Stroke: 16.0mm(0.582in.)
Output: 2.5 hp @ 34,000r.p.m.
Practical RPM Range: 3,000-40,000r.p.m.
Weight: 345.5g(12.0 oz.)