Just say :no: to chambered mufflers..Can anyone tell me what exhaust system to use to get the most out of the sound from my 390 FE? Is glass packs a good idea? If so, what would you recomend?
what size piping are you using/ how much hp are you making and how nasty is your cam??I did a lot of research before I did my exhaust and my findings were Chambered mufflers perform better than Turbo mufflers and, don't turn louvered glasspacks around because it causes turbulence and they burn out quickly.
As stated by another, there are a number of variables to contribute to a specific answer, but if you take dyno testing as a basic measure - it is rare for chambered mufflers to perform better than straight-through mufflers on virtually any engine combo. Quite rare. Also, the classic "Turbo" mufflers were chambered mufflers. These days, it could mean anything.I did a lot of research before I did my exhaust and my findings were Chambered mufflers perform better than Turbo mufflers
Ah, I know that one is urban legend, as I was curious why that was when I heard that myself many years ago. A magazine did flow testing and found it to be false. As part of a mid-summer curiosity (boredom) project, I tested with my flow meter and a 2-1/2 x 18 louvered glasspack (Purple Hornie IIRC). It flowed markedly better with the louvers facing back, just as the magazine found.and, don't turn louvered glasspacks around because it causes turbulence and they burn out quickly.