1/4 Wave Tuning

[Edward Hernandez R]

The 1/4 wave 'modules' that someone described are indeed there for noise reduction. Well designed ones have no effect on power. Volume is THE primary variable in tuning a 1/4 resonator, not length. The conventional Helmholtz methods aren't perfect since they are one dimensional, but they ususally get you close. I would not worry about duplicating this resonator if you are tranplanting the engine unless the noise really get to you.

Ed Hernandez
Ford Motor Company
ehernan3 at ed8719.pto.ford.com