Quote:
Originally Posted by RustyLugNut
Vapor does allow leaner combustible mixtures and can extend your fuel economy at low power cruise. However, the hot gas and air mix limits the mass of fuel and air into the engine at full power, so, disabling the vapor stream in some way would be needed.
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Air and fuel mixes are relative in that an air filter sets the maximum air into the engine.
Instead of being all air and adding gas for loads, vapor running would be more "all gas" and restricting air for loads. Either way