muffler break in period??
i just put on a dynomax super turbo muffler last thursday, but haven't been on the highway, until today. i had it at around 70mph for about 15-20min and i sounded nice. then when i got back on to normal streets it seemed louder. am i losing it or is there a "break in period" for the muffler?
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I have a Magnaflow racing series muffler (straight-through design). Sometimes it seems louder than other times, and without obvious reason. In general though, the obvious factors are RPMs (mine is loudest between 3,000-4,000 RPMs and much quieter at other RPMs), wind and road noise which would drown out some of the noise, and throttle. When I touch the throttle very gently, the noise almost completely goes away. Moderate to full throttle is louder, as it is during engine braking/deceleration in gear.
I don't know of any "break-in" period. And I'm not familiar with Dynomax products, but I thought I'd share my experience and see if that helped. :D |
rpm's didn't really have anything to do with it though. after i got off the freeway, where the rev's were at about 4grand for 15min straight, i got onto normal city roads. then my revs stayed between 2-3grand. even if i blipped the throttle it seemed louder. i'm not sure if because the engine was running at that high of a rev for that long, that it "warmed up" the muffler at all, maybe? that's my guess, but i wanted to ask all of you and get your opinions.
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your muffler got really warm from the hot running and its cold outside so when it slowed down the car it gets louder cuz more flow thro a hot muffler
thats my guess, it happens to me, i find it alot louder on coler days |
I was told that my Borla muffler would get louder after about 1,000 miles. I'm not sure if the person who told that really knew what they were talking about, but I thought I'd mention it. Personally, I don't *think* it's gotten any louder and I have almost 4K miles on it now. One thing did start happening though after a couple thousand miles and it sounds similar to what semtex said - when it's cold (well, that's a misnomer in FL ;) ) it makes a raspy noise akin to a hornet on acid for just a couple minutes until it warms up. It usually does it when I'm shifting from 1st to 2nd while the clutch is in and the revs are going down (backflow noise?).
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break-in? the welds i would imagine on the muffler could expand at higher temperatures, as well as letting the metal expand at the joints in your muffler, but either than that, it's normal, when i drove my car away from meineke, the car didn't seem that loud, and comparing the loudness of the echos i get from the houses in my neighborhood now and when i first got the thing installed a month and a half ago, it'doesn't seem any louder. i've never heard of a break in period, and seeing as there are NO moving parts what so ever, i don't see where you would need a break in period.
peace |
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