Nitro Star 21BB

Click here for the exploded parts view and parts list!

Construction

ABC (Aluminum case and piston, Chrome-plated Brass sleeve)

Displacement

3.45cc

Bore

19.5cc

Stroke

16.6cc

PS/Max RPM

2.3hp/30,000-33,000*

Weight

447g

Carburetor

7mm opening, slide-type, three-needle adjustment

Cooling head

Two-piece head, cast aluminum,
11 cooling fins, 47mm diameter

Porting

4 ports in cylinder sleeve

Suggested pipe

HPI # 1890 pipe for top performance

* These figures are estimates from the manufacturer of the engine. Like most R/C car companies, HPI purchases engines from model engine manufacturers, we do not have a testing lab or dyno to rate our engines.

HPI Nitro Star engines have a 2 year limited warranty. Read our Nitro Star Engine Warranty.