Alright so i know exhaust is all about flow, But wouldn't the best flow be with a straight pipe? I was told that this was a no, because yes you do need good flow but you also need back pressure? Basically what i want to know is, are glasspacks a good choice to use to increase horsepower or am i better off with a full on exhaust like ones from magnaflow? I'm not a huge fan of the sound of the magnaflows though, i enjoy the flowmasters. Is there an exhaust out there that has a good flow and a good sound? Because i was also told that the flow from flowmasters wasn't that impressive and did little to none change to the hp. Not trying to sound like a complete idiot! But i've always been curious lol. Let me know!
exhast is not a simple thing for best desired perfrmance. what motor do you have? what modifications do you have? what is your primary use for the car? all of these are important factors to what design of exhast system will work best for you.
Hopefully this helps!, I'm putting in a 302 with a 4 barrel holley carb, it has a 8' rear, a 3 speed auto with a shift kit, My primary use is just a sunday night cruiser with the balls to back it up lol. It's still in progress of having more added to it, i'm just not sure in which i want to add on. Hopefully that's enough information for the time being? I just want a good flowing exhaust with a nice loud obnoxious sound
An engine does not need any back pressure, for your engine don't worry about flow. Just view videos and see which ones you like best. The cam will also dictate how it sounds, so there will be some variation through the cars. But here's some examples. glasspacks: http://youtu.be/WEVK1f-Oiu0 flowmaster: and my favorite for a cruiser, Turbo mufflers:
Flowmaster Super44s on the dyno up to 6000 rpms. I told him to run it to at least 6500 if not 7000. He wimped out. And at idle in the garage. I am contemplating selling these and putting glasspacks on in the near future. I had sidepipes with glasspacks for years and loved them. Also ran dual glasspacks with side exit, and loved them also. Sound clip of my sidepipes on the old 302. http://scooper77515.fordmaverick.net/jpgs/dellaroar.mp3
Tuning an exhaust system for maximum performance is a very complex process. You have the flow of gases from the valve to the end of the tail pipe but you also have sound waves that are used to get more from the engine at the rpm range you are tuning it for. It all starts with the headers - to tune the exhaust you NEED equal length long tube headers. The primary tubes have to have the correct diameter and length for the range you wish to tune. Then you have to get the collector the right diameter, shape and length. If you want to get the most from your engine you tune the header primary, the collector, the distance to the "H" or "X" pipe, the distance to the muffler and the type and diameter of the muffler and that will determine the diameter and length of the pipe from the muffler back. You can broaden the tuning effect over a larger rpm range with an extraction cone at the end of the exhaust. The two biggest mistakes made in choosing an exhaust is header primaries that are too large and unequal length and a collector that is too large in diameter and too short.
headers 2 40's flowmasters edelbrock intake stock 72 mav block ported heads and c4 auto trans 72 mav block in a 70 -edelbrock - intake - powerfire dist - ported heads -headers - 2 40's flowmasters t-5 trans with a 12 pound flywheel http://http://www.youtube.com/watch?
Choosing an exhaust for the sound it makes is like choosing a carb for how shiny it is. Neither one will guarantee performance!
