Help: Exhaust
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Help: Exhaust
I recently installed a new muffler (custom built stainless) on my 03 sport. Everything else on the system is stock. I guess its supposed to sound like a flowmaster/magnaflow? To make a long story short, it doesnt. Im guessing that a tip wont help? It sounds ok at idle, and thats about it. Not nearly as loud/throaty as i hoped. What do i need or will a tip help me out? (sorry, im a noob) thanks dudes
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From: CHICAGO
welcome,
lets start by telling us what motor you have. so is it basically a race bullet? the magnum motors need some back pressure to preform at peak performance. also, a single or dual chamber muffler tends to sound more aggressive at idle but has a raspy note to it. if you are looking for something with a nice deep tone and less raspy, look at either a hooker aerochamber (or something to that effect) or a borla. also, depending on where you live, replacing the cats with a high flow or removing them completely is an option.
lets start by telling us what motor you have. so is it basically a race bullet? the magnum motors need some back pressure to preform at peak performance. also, a single or dual chamber muffler tends to sound more aggressive at idle but has a raspy note to it. if you are looking for something with a nice deep tone and less raspy, look at either a hooker aerochamber (or something to that effect) or a borla. also, depending on where you live, replacing the cats with a high flow or removing them completely is an option.
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From: CHICAGO
ok, headers would help for sure:http://www.krcperformance.com/krc/in...mart&Itemid=26
other than that wait for another V6 guy to chime in. i know those little engines need all the back pressure they can get. most of us 5.9 guys couldn't give a hoot if we lose a little back pressure b/c we have all the torque in the world.
other than that wait for another V6 guy to chime in. i know those little engines need all the back pressure they can get. most of us 5.9 guys couldn't give a hoot if we lose a little back pressure b/c we have all the torque in the world.
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Joined: Aug 2006
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From: poconos, pa
its a 3.9 v6, its going to sound ricey regardless. take my word for it. i got one, been there with 2 mufflers, dynomax and currently the magnaflow (no generic brand replica). magnaflow sounds as close as you can make our v6s sound like a v8, but will never sound like a true v8. flowmasters make the v6 sound raspy and crackle.
unless your talking about a cummins or any other diesel in particular. nope you dont have all the torque in the world. haha.
unless your talking about a cummins or any other diesel in particular. nope you dont have all the torque in the world. haha.
Last edited by f0x672; Jan 26, 2009 at 08:52 PM.
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hmmm.... should i hook it up with a cherry bomb classic glasspack 2000? can it be added in addition the the muffler or is it a replacement type thing? sorry for all he questions but mx bikes are my area of expertise, not trucks lol.
edit: i think i need to replace/remove the resonator, correct? MA is strict on emmissions...
2nd edit: the resonator on dakotas sits further toward the engine, correct? if the cherry bomb sits between the cat and muffler, both the cat and muffler still being intact, will i be all set?
edit: i think i need to replace/remove the resonator, correct? MA is strict on emmissions...
2nd edit: the resonator on dakotas sits further toward the engine, correct? if the cherry bomb sits between the cat and muffler, both the cat and muffler still being intact, will i be all set?
Last edited by minirdr; Jan 26, 2009 at 09:50 PM.
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From: Apex, NC
The reason for this common misconception is that most people don't think about how the exhaust flows through a pipe. At the walls of the pipe there is friction, causing the exhaust gas at the walls to flow slower than the gas in the middle of the pipe. Thinking about one "segment" of exhaust gas when the gas in the middle overcomes the gas at the walls (since it is flowing faster), it expands and rolls back on itself. This is what causes backpressure. The way to stop backpressure at low rpms where there is less exhaust gas is to use a smaller pipe that has less surface area and therefore less friction. However, a small diameter exhaust pipe does an engine no good at high rpms where there is a lot more gas. At high rpms an engine needs a larger pipe to allow the extra exhaust room to get out. This is the most important thing to consider when choosing an exhaust system. If you drive you vehicle at lower rpms you will want a smaller diameter pipe to reduce backpressure. If you like to run your motor up into its higher range you will want a larger pipe so you don't "choke" the engine.
Last edited by 95_318SLT; Jan 26, 2009 at 11:49 PM.
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I'd like to take the opportunity to break this myth. There isn't a motor in the world that needs backpressure. If the exhaust has backpressure, the engine is having to work harder to push the gas out and that work is robbing performance. Think about how much backpressure there is in the open headers on a top fuel dragster that pushes thousands of horsepower...not much.
The reason for this common misconception is that most people don't think about how the exhaust flows through a pipe. At the walls of the pipe there is friction, causing the exhaust gas at the walls to flow slower than the gas in the middle of the pipe. Thinking about one "segment" of exhaust gas when the gas in the middle overcomes the gas at the walls (since it is flowing faster), it expands and rolls back on itself. This is what causes backpressure. The way to stop backpressure at low rpms where there is less exhaust gas is to use a smaller pipe that has less surface area and therefore less friction. However, a small diameter exhaust pipe does an engine no good at high rpms where there is a lot more gas. At high rpms an engine needs a larger pipe to allow the extra exhaust room to get out. This is the most important thing to consider when choosing an exhaust system. If you drive you vehicle at lower rpms you will want a smaller diameter pipe to reduce backpressure. If you like to run your motor up into its higher range you will want a larger pipe so you don't "choke" the engine.
The reason for this common misconception is that most people don't think about how the exhaust flows through a pipe. At the walls of the pipe there is friction, causing the exhaust gas at the walls to flow slower than the gas in the middle of the pipe. Thinking about one "segment" of exhaust gas when the gas in the middle overcomes the gas at the walls (since it is flowing faster), it expands and rolls back on itself. This is what causes backpressure. The way to stop backpressure at low rpms where there is less exhaust gas is to use a smaller pipe that has less surface area and therefore less friction. However, a small diameter exhaust pipe does an engine no good at high rpms where there is a lot more gas. At high rpms an engine needs a larger pipe to allow the extra exhaust room to get out. This is the most important thing to consider when choosing an exhaust system. If you drive you vehicle at lower rpms you will want a smaller diameter pipe to reduce backpressure. If you like to run your motor up into its higher range you will want a larger pipe so you don't "choke" the engine.
i rarely get up past 3k when im cruising... ill hit 4k when im accelerating hard...the muffler on there is a 2.5 SiSo. i think ima replace the resonator w/ a cherry bomb...
Last edited by minirdr; Jan 26, 2009 at 10:11 PM.
for the love of god dont do that. you'll sound like a civic, trust me. i was bored one time and cut off my stock muffler and clamped in a cherry bomb, it was terrible. a couple months later i got a dynomax 3" superturbo catback, and in all honesty i dont think my truck could sound better. it sounds better than my friend's 4.7 at idle and decent until about 3k rpms, but by then the engine is so loud i cant hear the exhaust anyway. someday i'll post a video of my exhaust.