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    #1

    largest muffler possible?

    Hi!

    Doing the dual exhaust swap... I won't really see for myself how it all fits together until I've got my parts in hand and the car on a lift.

    Probably the larger the muffler, the quieter it can be. I'm looking at small truck options that are 4x9"x20" long (case-- 26" including pipes).

    If that ends up pushing all the piping back, I can always trim the s10 midpipes I ordered.
    But I don't know how much space there is; are 20" long mufflers going to bump into the fuel tank or some other obstruction?

    If so, I think 13, 14" (x4x9 oval) mufflers are the next standard size down, and I can always go with them.


    -Bernard
    Tags: None
    #2
    for reference, the mufflers in the picture HPP posted is 18 inch total length.

    Honestly, just buy stock replacement mufflers if you're THAT big on quietness. You aren't going to get them that much quieter, because a stock engine sounds is like 1% exhaust noise. Most of what you hear is underhood noise.

    85 4 door 351 Civi Crown Victoria - Summer daily driver, sleeper in the making, and wildly inappropriate autocross machine
    160KMs 600cfm holley, shorty headers, 2.5" catted exhaust, 255/295 tires, cop shocks, cop swaybars, underdrive pulley, 2.73L gears.
    waiting for install: 3.27's, Poly bushings, boxed rear arms, 2500 stall converter, ported e7's, etc

    06 Mazda 3 hatch 2.3L 5AT (winter beater that cost more than my summer car)

    Comment

      #3
      yeah, stock mufflers are about as silent as it gets. They don't breathe worth a damn though, which is why they are so quiet. I drove Scott's Grand Marquis home 2 days ago, and its scarily quiet even with a hole in one of the mufflers.

      Most turbo mufflers aren't very loud, and if you have catalytic converters, they do not create obnoxious levels of sound.
      86 Lincoln Town Car (Galactica).
      5.0 HO, CompCams XE258,Scorpion 1.72 roller rockers, 3.55 K code rear, tow package, BHPerformance ported E7 heads, Tmoss Explorer intake, 65mm throttle body, Hedman 1 5/8" headers, 2.5" dual exhaust, ASP underdrive pulley

      91 Lincoln Mark VII LSC grandpa spec white and cranberry

      1984 Lincoln Continental TurboDiesel - rolls coal

      Originally posted by phayzer5
      I drive a Lincoln. I can't be bothered to shift like the peasants and rabble rousers

      Everything looks like voodoo if you don't understand how it works

      Comment

        #4
        True the stocker just sounds like a rush of air lol. Not even really an engine tone.


        '90 LX 5.0 mustang
        Big plans

        Comment

          #5
          Originally posted by 1980c10 View Post
          True the stocker just sounds like a rush of air lol. Not even really an engine tone.
          Must be something wrong with my mufflers then, cause I can hear an engine note... Granted it's quiet, but it's there.

          Comment

            #6
            Over 9000.








            I'm sorry.
            sigpic


            - 1990 Ford LTD Crown Victoria P72 - the street boat - 5.0 liter EFI - Ported HO intake/TB, 90 TC shroud/overflow, Aero airbox/zip tube, Cobra camshaft, 19lb injectors, dual exhaust w/ Magnaflows, Cat/Smog & AC delete, 3G alternator, MOOG chassis parts & KYB cop shocks, 215/70r/15s on 95-97 Merc rims

            - 2007 Ford Escape XLT - soccer mom lifted station wagon - 3.0 Duratec, auto, rear converter delete w/ Magnaflow dual exhaust

            - 2008 Mercury Grand Marquis Ultimate Edition - Daily driver - 4.6 2 valve Mod motor, 4R75E, 2.73s. Bone stock

            Comment

              #7
              ok, that's reassuring.
              I've had visions in my head of my largely stock wagon sounding like one of those 17 year olds with cherry bomb "mufflers" and 4" chrome tips

              Comment

                #8
                Cherry bomb glasspacks. I have a single exhaust system dumping out on just a little behind the rear end with a turndown chrome tip to keep the exhaust HEAT from the gas tank. It is fairly quiet and only wakes up a little when I lightly go at it. If I baby it like grandma or even MOMS you cannot hear it. If I punch it down, it draws attention. Personally I like to hear my cars. That way I can hear if they are running right.
                90 Colony Park LS with GT 40 heads and intake. HO cam, 65 MM TB, 67 MM EGR spacer. Has a 75 MM Pro Flow mass air sensor. Borla XS mufflers. 3L55. Shift kit, 2000 stall Tq convertor...Bilstein shocks, front and rear sway bars.
                90 Colony Park LS 64,000 miles all original. 3L55 tow package....front and rear sway bars.
                91 Grand Marquis GS....HO motor..Bilstein shocks poly bushings and police swaybars. This one handles the best.
                70 Torino Squire with M code 351 Cleveland 3.00 has Magnaflow mufflers. Hidden headlights and power windows. All original

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