Exhaust Sound Got Louder Options

[fgvillegas]

i just noticed that after upgrading my cams and having my engine dyno tuned, my exhaust sound got louder.

what could be the reason? does it have something to do with the size of the exhaust pipe? the current size is 2-3/8". i don't know if it should be increased or decreased.

thanks.

[freddy121389]

this is a complete guess, I'm limited on knowledge as to building engines but here it goes anyway. When upgrading cams it increases the duration of lift on your valves allowing more air and fuel to go into the chamber meaning bigger combustion. With a bigger combustion means a louder sound. I think this would be the reason anyway. Anyone else want to chime in?

[Nartanian]

this is a complete guess, I'm limited on knowledge as to building engines but here it goes anyway. When upgrading cams it increases the duration of lift on your valves allowing more air and fuel to go into the chamber meaning bigger combustion. With a bigger combustion means a louder sound. I think this would be the reason anyway. Anyone else want to chime in?

Pretty much nailed it. I heard a difference going from stock to 272s. It has to do with the size and the amount of lift the cams allow for. Bigger cams usually give the engine some lope to it at idle too. You will also run on less vacuum compared to stock cams.

Also increasing you piping size diameter (from downpipe or cat) will not make your car quieter. It will in fact make it noticeably louder. Depending you what you've done though you will most likely free up (not gain) more power. You should tell us more bout your set-up and how much power you're making.

This post has been edited by Nartanian: Sep 27, 2010 - 4:47 PM