This is the ProTek R/C 321B "Samurai V2" Off-Road 3-Port Competition Buggy Engine. The 321B “Samurai V2” Off-Road 3-Port engine is ready to lead you into battle – a samurai, by definition, is a noble, powerful warrior willing to serve his master – with a short-stroke, turbo head, rear ceramic bearing and legendary, easy-to-tune carburetor, it’s easy to see why the ProTek racing engine bears the Samurai moniker!
The Samurai sips fuel without sacrificing horsepower thanks to the new LRT carburetor. The handcrafted powerhouse has been built meticulously by a world-renown Japanese engine manufacturer, to the specs of AMain’s top pro drivers.
The Samurai delivers a versatile package like no other – excellent fuel mileage, predictable, crisp throttle-response and consistent carburetor settings are all traits every racer needs to stand atop the podium – to be crowned the master of his class.
The Samurai 321B has been meticulously designed and crafted in Japan by a leading maker of model engines. It has been manufactured in limited production runs guided by nearly 80 years of experience and an unrelenting commitment to both quality and performance.
- Superior tunability
- Low CG cooling head
- Increased fuel mileage
- Unrivalled power
- Smooth and responsive power band
- 6 & 6.5mm circular restrictors
- Ceramic rear bearing
- ABC piston and cylinder
- Ultra hot ProTek P3 turbo glow plug
- Strengthened black-coated crankcase
- Utilizes LRT Carburetor (PTK-2570)
- PTK-2060: ProTek R/C 2060 Tuned Pipe w/Manifold (PTK-2060-1: pipe only)
- PTK-2090: ProTek R/C 2090 Tuned Pipe w/Manifold (PTK-2090-1: pipe only)
- PTK-2542: ProTek R/C P3 Turbo Glow Plug (Ultra Hot)
Displacement: 3.46cc (0.211cu.in.)
Bore: 16.6mm (0.654in.)
Stroke: 16.0mm (0.630in.)
Practical R.P.M.: 3,000 - 40,000
Power Output: 2.5ps / 34,000 R.P.M.
Weight: 355g (12.52oz)
- (1) 321B "Samurai V2" Off-Road Buggy Engine
- (1) P3 Turbo Glow Plug (Ultra Hot)
- (1) High Temp Exhaust Gasket
- (1) 6mm "Circular" Aluminum Carburetor Restrictor
- (1) 6.5mm "Circular" Aluminum Carburetor Restrictor
- (3) Dust Caps (3mm, 16mm & 17mm)
- (1) Instruction Manual
Settings: (These are my finalized settings AFTER break-in and 1 gallon of fuel) use the recommended break-in procedure in manual!!!!!!!!
Altitude: sea level-1500ft.
Ambient temp: 75-80*F
Buggy: Mugen MBX-7
Fuel: Nitrotane 30%
Plug: O.S. P3 (included)
carb restrictor: 8mm (included)
Pipe: O.S. 2090 or O.S. 2050
Header: O.S. M2000
Head Clearance (factory setting)
Idle: flush (factory setting)
low Speed: flush (factory setting is 0.5mm OUT from flush)
Mid Speed: (0.10mm in from flush) 3-4 hours leaner than factory setting
High Speed: 1.20mm in from flush
You can't go wrong with this absolutely amazing and fine machinery,
to the exterior starting with the package, box, and what is inside finish of the engine,
tons of quality of this OS based engine interior, easy to tune, and holding the setting in really fine
carburetor, and the power is unlimited in the straight, yet bottom end punches
with easy any bump and jump of the track. 2060 pipe is what I suggest for buggy.
Fuel Economy is a blast! 6.5mm restrictor will work all around, if you
find the sweet spot on the trigger and cruise the track can easily break
the 9minute mark for a refill, a trained finger and light drive train of the buggy
will give you more run time, no doubt about it.
Price is a bang! high quality, japan made, hardened crankshaft, finest bearings,
even includes glow plug!
Do not hesitate, go with the Samurai for price, quality, run time, and power.
At the end of the day, this engine isn't groundbreaking. What this engine is, is a very high quality, very reliable, very easy to drive engine that doesn't break the bank.
I've had engines from all the big manufacturers, from the cheapest models to the most expensive. This engine has all the power of the most expensive and the right balance between features, durability, tuneability, and cost.
I highly recommend this engine to any racer from beginner to pro.