Available from HPI Racing is the New Nitro Star
S-25 engine! This powerful new engine has 20% more displacement than our
Nitro Star 21BB engine!
The Nitro Star S-25 is a .25 cubic inch (4.1cc) big block engine
that features a machined billet aluminum heatsink head for extra cooling, dual
bushing aluminum connecting rod, true ABC chrome sleeve construction for
durability, and a simplified dual needle 7mm slide carburetor for easier tuning
with a composite body for better performance at higher temperatures.
| |
21BB |
Nitro Star S-25 |
| Size |
.21 |
.25 |
| Horsepower @ RPM |
2.3hp @ 30,000 |
2.5 @ 29,000 |
| Maximum RPM |
|
38,000 |
| Heatsink Head |
cast metal |
Machined Aluminum |
| Case |
silver |
Black Heatsink Coating |
| Carburetor |
metal |
Composite |
| Carb Adjustments |
high, mid, low |
simplified to High and Low |
| Connecting Rod |
single bushing |
Dual Bushing |
| Construction |
ABC |
ABC |
