Big Timmy
Husqvarna
Pro Class
Hey some of the best custom headers money can buy come from companies that don't need to suck up and kiss any ones ass and they don't need to spend a fortune to advertise either.
Talking about your FMF slip on being loud, well really its just another type of resonator itself but a well placed resonator in the head pipe like we are referring to would likely quite it down some.
The resonator's we are talking about do sort of trick the engine into thinking it has a longer head pipe giving it a wider power band but they must be of a size that is carefully tuned to reflect and cancel out sound waves of specific frequencies. It will smooth out the exhaust pulses and resonant drone and can allow the engine to extract more power with out any increase in fuel consumption.
The "Helmholtz" resonator device has been around since the 1850s and can be used today for many things. An acoustic hollow bodied Guitar for instance is a type of Helmholtz resonator.
Pop the hood of any modern or new vehicle. It will have intake resonance chambers to help reduce air intake noise that are of the Helmholtz design. This is much more common to see on the intake side of a production vehicle than the use on an Exhaust system. Look at the back of a new Camaro next time you see one. those big stupid looking boxes under the rear roll pan are exactly that resonant chambers to cancel out exhaust drone.
My 2010 F550 V10 gas burner work truck has no less than 6 of them on the intake air inlet going from the airbox to the throttle body.
Talking about your FMF slip on being loud, well really its just another type of resonator itself but a well placed resonator in the head pipe like we are referring to would likely quite it down some.
The resonator's we are talking about do sort of trick the engine into thinking it has a longer head pipe giving it a wider power band but they must be of a size that is carefully tuned to reflect and cancel out sound waves of specific frequencies. It will smooth out the exhaust pulses and resonant drone and can allow the engine to extract more power with out any increase in fuel consumption.
The "Helmholtz" resonator device has been around since the 1850s and can be used today for many things. An acoustic hollow bodied Guitar for instance is a type of Helmholtz resonator.
Pop the hood of any modern or new vehicle. It will have intake resonance chambers to help reduce air intake noise that are of the Helmholtz design. This is much more common to see on the intake side of a production vehicle than the use on an Exhaust system. Look at the back of a new Camaro next time you see one. those big stupid looking boxes under the rear roll pan are exactly that resonant chambers to cancel out exhaust drone.
My 2010 F550 V10 gas burner work truck has no less than 6 of them on the intake air inlet going from the airbox to the throttle body.