The nitrous tends to settle in the manifold and cylinders ... See All 10 Photos When nitrous exits the bottle, it is transformed from a pressurized liquid to a gas, rapidly cooling as it does ...

That's because with power adders comes increased cylinder ... to 10* (with EFI). With carburetion back the timing off about two degrees per 50 horsepower of nitrous. Thankfully, most 5-liter ...