Nitro Star 21BB
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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, |
| 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.