Advice needed for exhaust problem
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Advice needed for exhaust problem
Hey everyone,
ok, I have a 2005 F-150 5.4L 2wd stock, I been having a flowmaster 40 series, since I bought it, and the sound had declined over time, the muffler I had it redone today and still sound like crap, i mean... my wifes uncle has an 07' chevy silverado 4.8L and has a 50 series SUV, and it sound GREAT!, and my 40 series sounds bad, when I start up is deep and loud, but as it levels the RPM it gets quiet, then if i rev up it sounds less deep, till there is just a high speed air flow sound, if im driving the more I step on it, the less deep it gets, but the sound from the high air flow takes over, so it sounds like a v6 stock at high RPM... is really hard to explain, today the muffler shop, cut the 2.25" stock pipe comming from the cats/manifolds, and replaced it with a 3" then the opened the 40 series to accept the 3", on the out side they fitted a 2.5" and installed just a 90 degree and exit before the axle, it looks like *****, but it was a test, why is it that a 4.8L chevy on a 50 series sound better (loud and deep) than this ford 5.4L on a 40 series? not even the muffler shop can figer it out, and it is driving me nuts, I don't have engine lights or errors, I only have 40k on this truck, and I just had the dealer install new plugs, I did noticed that it performs better, I have faster acceleration now as it has better flow, but where is the sound?
what muffler combination is everyone runnign on a 5.4L that sounds good? I want it deep and not super loud, but sport/performance sound, not like a 4 cylinder on duals or a BUICK getto style.
ok, I have a 2005 F-150 5.4L 2wd stock, I been having a flowmaster 40 series, since I bought it, and the sound had declined over time, the muffler I had it redone today and still sound like crap, i mean... my wifes uncle has an 07' chevy silverado 4.8L and has a 50 series SUV, and it sound GREAT!, and my 40 series sounds bad, when I start up is deep and loud, but as it levels the RPM it gets quiet, then if i rev up it sounds less deep, till there is just a high speed air flow sound, if im driving the more I step on it, the less deep it gets, but the sound from the high air flow takes over, so it sounds like a v6 stock at high RPM... is really hard to explain, today the muffler shop, cut the 2.25" stock pipe comming from the cats/manifolds, and replaced it with a 3" then the opened the 40 series to accept the 3", on the out side they fitted a 2.5" and installed just a 90 degree and exit before the axle, it looks like *****, but it was a test, why is it that a 4.8L chevy on a 50 series sound better (loud and deep) than this ford 5.4L on a 40 series? not even the muffler shop can figer it out, and it is driving me nuts, I don't have engine lights or errors, I only have 40k on this truck, and I just had the dealer install new plugs, I did noticed that it performs better, I have faster acceleration now as it has better flow, but where is the sound?
what muffler combination is everyone runnign on a 5.4L that sounds good? I want it deep and not super loud, but sport/performance sound, not like a 4 cylinder on duals or a BUICK getto style.
MMNC (SS)(Ret)
Joined: Mar 2004
Posts: 11,602
Likes: 148
From: SE Georgia
are you sure it is a real flowmaster muffler?
they have and still do have an issue with companies making knock-off versions. A real flowmaster will have it stamped on the body.
otherwise...any car with a 40 series Flowmaster is going to be godawful loud. My 5.7 Hemi had one and it would set off car alarms and at certain RPM's made the entire vehicle resonate.
I'm betting you have a knock-off muffler and the interior baffles have blown out
they have and still do have an issue with companies making knock-off versions. A real flowmaster will have it stamped on the body.
otherwise...any car with a 40 series Flowmaster is going to be godawful loud. My 5.7 Hemi had one and it would set off car alarms and at certain RPM's made the entire vehicle resonate.
I'm betting you have a knock-off muffler and the interior baffles have blown out
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it is a real flowmaster, I had the box, warranty stickers, etc. and it is stamped, but it looks like the multi-chamber mufflers don't do well on FORD 5.4L modular engines, unlike the DODGE & Chevy, they sound excellent on Chevy, I don't like them on DODGE ( Actually I don't like Dodge's in any way ) but this is my 1st FORD and that part is dissapointing.
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