Hi Performance Muffler Question
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Senior User
Joined: Apr 2004
Posts: 197
Likes: 1
From: Chicagoland Metro area
Hi Performance Muffler Question
Last year, I put a new exhaust system on the truck (390 2 bbl). I just went with a stock single exhaust system with off the shelf muffler. Now, I find that I keep wanting a little bite in the bark, so to speak.
One option I am thinking of is to get a muffler that has a single inlet and dual outlets so I can run a dual exhaust. I would prefer not to replace the whole system due to cost. It doesn't have headers, just stock "log" manifolds. Any good truck muffler recommendations out there that will make the 390 sound good?? Thanks!
Dave
One option I am thinking of is to get a muffler that has a single inlet and dual outlets so I can run a dual exhaust. I would prefer not to replace the whole system due to cost. It doesn't have headers, just stock "log" manifolds. Any good truck muffler recommendations out there that will make the 390 sound good?? Thanks!
Dave
Lead Driver
Joined: Apr 2001
Posts: 6,175
Likes: 21
From: Texas
I run Magnaflow stainless, single in dual out mufflers. I like the sound and the build quality. But, I'm running 2 of them....
see some pics at:
http://www.thedreyerfamily.com/69f250/67f250/exh.htm
see some pics at:
http://www.thedreyerfamily.com/69f250/67f250/exh.htm
Elder User
Joined: Aug 2003
Posts: 693
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From: Tuttle, Oklahoma
my buddy has a single 4" exhaust on his built 390 with a dynomax turbo 4" in dual 4" out
it sounds VERY mean and very smooth, none of the typical popping as associated with free flowing dual exhaustwithout a cross over pipe
it sounds VERY mean and very smooth, none of the typical popping as associated with free flowing dual exhaustwithout a cross over pipe
Posting Guru
Joined: Mar 2003
Posts: 1,622
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From: nevada
My Flowmasters used to pop,pop,pop, when I had them coming out in front of the rear tires. When i moved them (same mufflers) to rear exit, and added chrome resonators, it disappeared, and sounds much better.Especially if you have a little cam in front of them. If you go to the Flowmaster site, they have sound examples of mufflers (at least they used to). they also explain interior/exterior noise levels according to specific mufflers.
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Senior User
Joined: Apr 2004
Posts: 197
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From: Chicagoland Metro area
Yep, I did go to the Flowmaster site, and they still have the inside/outside noise levels, and also examples of the way the exhaust sounds. I am just trying to do my homework to find a muffler that gives the truck a nice mellow sound vs a real aggressive sound. Flowmasters may be the way to go, but, I need to call a few of the companies that have been recommended on this forum to really zero in on which system will do what I want. Thanks for all the suggestions here.
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Elder User
Joined: Dec 2002
Posts: 925
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From: Quaker Hill ,CT U.S.A.
I had a dynomax muffler on my 360 and it sounded great , not too loud not too quite . Now I am running the stock set up but I miss the V8 sound everyonce and a while . I find that all the perfomance type mufflers tend to drone out on the highway on long trips but I guess that is my opinion .
!["Beemer Nut"'s Avatar](data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 50 50'><circle class='avatar-circle-default' fill='%23bc5285' cx='25px' cy='25px' r='20px'></circle><text class='avatar-text-default' x='49%' y='53%' fill='white' text-anchor='middle' alignment-baseline='middle'>"</text></svg>)
Post Fiend
Joined: Dec 2003
Posts: 6,658
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From: "Islander"
No drone at highway speeds
Chas1234, I have a warmed over 410 with a custom duel exhaust, X cross, 2 1/2" ending with 4 1/2" before the tips,tips 19" long, it is quiet above 1,700 rpm at highway rpm's. Between 12 and 1,600 rpm i drone and this is with a home a made baffle inserts in the 4 1/2" X 19" long tips. Without baffles i set off car alarms and the cops.Edelbrock RPM stainless steel lifetime mufflers sound and flow better than Flowmasters, blat, blat sounding highschool crap. (my sound opinion). Engine size, cam, exhaust size and personal taste may vary. Carl..........=o&o>.......
Junior User
Joined: Apr 2003
Posts: 72
Likes: 0
From: Mtn. view CA
Give spintech's web site a look over, I got two of them and an a satified customer. the mufflers dont drone, but it does get loud when I step on it, but falls quiet when backed off the throttle.
Post Fiend
Joined: Dec 2003
Posts: 6,658
Likes: 4
From: "Islander"
Spintech vs Ravens
Welldiver, Spintech and Raven were my next choice. Any word on Ravens for drone problems? Getting loud when you nail it is ok with me, it's that drone at 30-40 mph zone i want to eliminate. Thanks, Carl......=o&o>..........