why do aftermarket mufflers seem to get louder over time?
I know glass packs do it because the filler kind of burns but what about mufflers without sound deadening material? I noticed this with my flowmaster after about 5k miles and my spintech is doing it too. my spintechs been on for about 2k but was on my buddies el camino for almost a year. it doesnt bother me but it baffles me. is it just the ecu?
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toytec coilovers/ 5100s/ axis regulators/ yokohama ats/ spintech prostreet
The single biggest problem with communication is the illusion that it has taken place. -Shaw
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toytec coilovers/ 5100s/ axis regulators/ yokohama ats/ spintech prostreet
The single biggest problem with communication is the illusion that it has taken place. -Shaw
We have two ears and one mouth so we can listen two times as much as we speak. -Epictetus
I noticed this same thing when I put flowmasters on my truck, too. I'm thinking that after a new muffler heats up and cools down a bunch of times, it flexes the internals, which could possibly move them around inside the case. This may cause the baffles to move into a position that might make the exhaust sound louder. Don't know for sure, just a guess...
thanks for the response guamguy. that makes sense to me.
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toytec coilovers/ 5100s/ axis regulators/ yokohama ats/ spintech prostreet
The single biggest problem with communication is the illusion that it has taken place. -Shaw
We have two ears and one mouth so we can listen two times as much as we speak. -Epictetus
Sometimes my truck seems louder than other times as well. Though I doubt that it has to do with the internals of these mufflers. Brands like Flowmaster, Borla, Gibson, Magnaflow etc... use metall baffles inside to direct the exhaust flow in ways to lower noise. These metal baffles are welded in place. I find it hard to believe that these baffles would move at all unless you somehow manage to get so much back-pressure as to blow out your muffler. If muffler internals were constantly changing over time, wouldn't all mufflers eventually get too loud and have to be replaced?
I think the difference in sound is coming from something other than the muffler. For example, my truck is MUCH louder in cold/cool weather due to air temperature.
I'm no sound expert. just my 2 cents
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2003 Toyota Tundra 4.7L Modifications:
- Gibson Stainless Steel Headers - Gibson Stainless Steel Single Side Exit Cat-back system - SnugTop Tonneau Cover - Line-X Bedliner - Medium Front Tint - Limo Rear Tint - CrimeStopper Alarm system/remote start - Dynamatted doors - complete aftermarket sound system - more to come as I make that $GREEN$
you have a good point there. I was thinking it may be the insides warping a bit, kind of like a break-in thing. The only problem is my spintech was used in a dual exhaust set up on my buddys el camino. If that motor didn't break it in first, I can't see my truck hurting it. I am running it single as opposed to dual but his motor is pretty built and his foot weighs a ton. Either way, he gave me the flowmaster for free and the spin for $60, free install too.
If anybody else has an idea, please add it.
__________________
toytec coilovers/ 5100s/ axis regulators/ yokohama ats/ spintech prostreet
The single biggest problem with communication is the illusion that it has taken place. -Shaw
We have two ears and one mouth so we can listen two times as much as we speak. -Epictetus
I think it's just wear and tear i noticed that to but i will ask my muffler man at the shop 2mara and let yall know 10-4?
__________________ 2000 tundra 4.7L TRD Limited AC cab.
Mods -Windows tinted -Highland floor mats -Maganaflow single in dual out with 3 " tips -16x10" rims 5 spoke Ultra Stargazer chrome plated -One 10" speaker with a 400 watt amp Under back seat -Interior lights changed to blue -Red blinkers -Sirus radio -Volant cold air intake -Ready lift leveling kit -Tool box -Hitch recevier -Chrome step sides -Chrome bed rails -Chrome grille guard with spot lights -White face gauges
i dont know why they do but they do get louder over time. have had 3 and all have. same with all my buddys and the muffler man told me every time i got one
__________________ 06 TRD 4x4 DC Limited, IForce v8, jba headers, 5" tough country ez-ride, 17" moto metal rims, 35 by 12.5 toyo open coutry mt, straights, 3" stainless tips, uws toolback, high lift, cb with pa, 15% all the way around, gps, exhaust vid http://www.youtube.com/watch?v=sF8ag8ZbTBY
cool guys. It isn't bothersome to me, but things I don't understand are. Thanks for the input.
__________________
toytec coilovers/ 5100s/ axis regulators/ yokohama ats/ spintech prostreet
The single biggest problem with communication is the illusion that it has taken place. -Shaw
We have two ears and one mouth so we can listen two times as much as we speak. -Epictetus
diferent muffler question
06 TRD 4x4 DC Limited, IForce v8, jba headers, 5" tough country ez-ride, 17" moto metal rims, 35 by 12.5 toyo open coutry mt, straights, 3" stainless tips, uws toolback, high lift, cb with pa, 15% all the way around, gps,
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