Nitrous Oxide HP Gain Calculator

Most experts recommend running slightly rich between 11.5-12.5:1 for safety. For engines under 250 HP, you can run the same ratio as naturally aspirated. For higher power levels (450-500 HP), use 11.5:1 as a safety factor.

Higher bottle pressure increases nitrous flow rate, which directly impacts horsepower gains. Cold bottles (high pressure) flow more nitrous than warm bottles. Maintaining consistent bottle pressure is crucial for predictable performance.

Proper fuel jet sizing ensures the correct air/fuel ratio under nitrous injection. Too small a fuel jet can cause lean conditions leading to detonation and engine damage, while too large can cause rich conditions reducing power.

Jet flow is affected by bottle pressure, fuel pressure, jet size, and system design. Higher pressures increase flow, while larger jets obviously flow more. Temperature also plays a significant role in bottle pressure.

Generally, you can expect approximately 10-12 horsepower per pound per hour of nitrous flow. This varies based on engine efficiency, compression ratio, and overall system design.

No, running lean ratios with nitrous is dangerous and can cause catastrophic engine damage. The small power gains from leaning out the mixture are not worth the risk of detonation and engine failure.

Larger displacement engines can typically handle more nitrous flow per cylinder. The flow should be distributed evenly across all cylinders, with displacement helping determine the maximum safe flow rate.

The purge system vents nitrous from the lines before injection, ensuring consistent shot delivery. It removes air and ensures only liquid nitrous reaches the engine, providing predictable power delivery.