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Thread: dual purpose, exhaust

  1. #1
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    Default dual purpose, exhaust

    Hey guys, I have a clogged cat problem on my '85 CV, and want to do I dual exhaust conversion while I'm taking care of it. What do I need to do this? Obviously an H-pipe, mufflers, and cats, but what else, and what sizes? Any suggestions for good mufflers are appreciated, as I know nothing about them, and am looking for a low, subtle sound that's not loud, but not TOO quiet. Are clamps kosher, or is welding a "must"?

    More importantly, though, does anyone know what PA's emissions tests laws are? Do all vehicles get emissions tests, or is there a cut off where if you don't drive a certain number of miles, they don't make you get one? I thought I heard something like that, but I wanted to check, as a few of you guys are from PA.

    Thanks in advance.

    -Tommy

  2. #2
    Has-been that never was. Blaze86Vic's Avatar
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    Pretty much every state has a special pupose/classic car registration with a mileage restriction. But what you want is 2-1/4" exhaust, with DynoMax SuperTurbo muflers, and high flow cats. This will keep you street legal, and maintain and almost stock sound as well. Adjust muffler type for different sound but with cats don't plan on ever being really loud. If you decided to go cat free then it will get significantly louder.

  3. #3
    ... mrltd's Avatar
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    Pa's emmissions laws vary by county.
    Builder/Owner of Badass Panther Wagons

    Busy maintaining a fleet of Fords

  4. #4
    I post a lot... 88Vic's Avatar
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    Glasspacks are pretty loud. And if you go with a Mustang exhaust, it's 2.5".
    88 Town Car (wrecked, for sale)
    Walker OEM duals with muffler deletes

  5. #5
    ... mrltd's Avatar
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    Quote Originally Posted by 88Vic
    Glasspacks are pretty loud. And if you go with a Mustang exhaust, it's 2.5".
    Stock (and some aftermarket) mustang exhaust is 2.25" 2.25 is all that's needed for most vic applications.
    Builder/Owner of Badass Panther Wagons

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  6. #6
    I post a lot... GoodSamaritan's Avatar
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    I have some 4ft long glasspacks on my wagon. It is noticable but not annoying. Sounds better than it has a right to. I have been complimented on it more than once.
    Owner of the only known 5 speed box wagon with a lift kit.
    AKA, Herkimer the Hillbilly SUV.



    Axle codes
    Open/Lock/Ratio #
    -----------------------
    G / H / 2.26
    B / C / 2.47
    8 / M / 2.73
    7 / - / 3.07
    Y / Z / 3.08
    4 / D / 3.42
    F / R / 3.45
    5 / E / 3.27
    6 / W / 3.73
    2 / K / 3.55
    A / - / 3.63
    J / - / 3.85

  7. #7
    Domestic Tourist Lincolnmania's Avatar
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    Quote Originally Posted by fairplay
    Hey guys, I have a clogged cat problem on my '85 CV, and want to do I dual exhaust conversion while I'm taking care of it. What do I need to do this? Obviously an H-pipe, mufflers, and cats, but what else, and what sizes? Any suggestions for good mufflers are appreciated, as I know nothing about them, and am looking for a low, subtle sound that's not loud, but not TOO quiet. Are clamps kosher, or is welding a "must"?

    More importantly, though, does anyone know what PA's emissions tests laws are? Do all vehicles get emissions tests, or is there a cut off where if you don't drive a certain number of miles, they don't make you get one? I thought I heard something like that, but I wanted to check, as a few of you guys are from PA.

    Thanks in advance.

    -Tommy
    tommy
    i do believe you guys get the dyno test in allentown, so you are going to need cats to pass the emmisions test........if you drive under 5,000 mi a year you get an emmisions exempt sticker, but most shops will still check to see if all the emmisions equipment is still there
    i reccomend a set of stock shorty headers on that lopo motor, a catted h pipe for a mustang or a mark7, some 2.5" ofset ofset mufflers, a pr of impala ss 2.5" tailpipes, a pr of mustang midpipes, 4 12" pieces of 2.5" exhaust, two turndowns, clamps and hangers.............you can also do the stock box duals with 90 towncar headers, or the 2.25" midpipes with stock 2" tails.......have done them a bunch of ways.........i'm me sometime i can give you more details........i just finished nicks grand marquis last wk, pics up in scotts automotive, we used a pr of used 2.25" tails with chrome tips on his car.......he lives in bethlehem, maybe you can catch up with him sometime........come to my shop sometime mang! would love to meet you, i'm a little over an hr away from you
    scott

    1986 lincoln towncar signature series. 5.0 HO with thumper performance ported e7 heads, 1.7 roller rockers, warm air intake, 65mm throttle body, 1/2" intake spacer, ported intakes, 3.73 rear with trac lock, 98-02 front brake conversion, 92-97 rear disc conversion, 1" rear swaybar, 1 3/16" front swaybar, 16" wheels and tires, loud ass stereo system, badass cb, best time to date 15.94 at 87 mph. lots of mods in the works 221.8 rwhp 278 rwt
    2006 Lincoln Town Car Signature. Stock for now
    1989 Ford F-250 4x4 much much more to come, sefi converted so far.
    1986 Toyota pickup with LSC wheels and 225/60/16 tires.
    2008 Hyundai Elantra future Revcon toad
    1987 TriBurner and 1986 Alaska stokers keeping me warm. (and some pesky oil heat)

    please be patient, rebuilding an empire!


  8. #8
    Lets put cough drops in out buttholes and play video games DuceAnAHalf's Avatar
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    hey Scott, what year Impalla SS tail pipes? like 95 or so? I might put tails on my car. Only because i want to put on flame throwers.

    Good welding will ensure a leak-free system, but a fully welded exhaust is a bitch because you cant just unbolt your mufflers, you have to drop the whole system.

  9. #9
    ... mrltd's Avatar
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    yes...the late model RWD 94-96 Impala
    Builder/Owner of Badass Panther Wagons

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  10. #10
    Lets put cough drops in out buttholes and play video games DuceAnAHalf's Avatar
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    Quote Originally Posted by mrltd
    yes...the late model RWD 94-96 Impala
    Thats what i thought, but i did not remember ever seeing a year on the application.

  11. #11
    A.K.A Kaptain Kanuck, Your Connection To The Great Land Of Eternal Winter and Incredibly Rusty Cars 91LTDProject's Avatar
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    I would personally go with Flowmaster 40 series

  12. #12
    I'm an air-conditioned gypsy gadget73's Avatar
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    meh, flowmasters. They sound OK and all but they have a hollow tinny sound and have a tendency to backfire and rumble a bit more than I personally care for. The Thrush turbos aren't obnoxious and are pretty cheap, Dynomax SuperTurbos are also nice. Summit mufflers are real cheap but mine are pretty darn quiet. Sounds just about stock noise level.

    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

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  13. #13
    pickup man boXman's Avatar
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    I like the pro force mufflers on Nick's car...sounds reall good!
    '89 Ford LTD Crown Vic - '92 Ford F-150 Custom -
    '95 Ford Bronco XL -

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  14. #14
    Lets put cough drops in out buttholes and play video games DuceAnAHalf's Avatar
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    Quote Originally Posted by gadget73
    meh, flowmasters. They sound OK and all but they have a hollow tinny sound and have a tendency to backfire and rumble a bit more than I personally care for. The Thrush turbos aren't obnoxious and are pretty cheap, Dynomax SuperTurbos are also nice. Summit mufflers are real cheap but mine are pretty darn quiet. Sounds just about stock noise level.
    i went form 40s to 50's and it got rid of the hollow sound. a little more muffled, but still sounds good.

  15. #15
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    Awesome, I think I'm going with a slightly modded version of scott's suggestion, or something very much like it. Thanks guys.

    Scott, I'll IM you sometime, mang. Thanks again.

  16. #16
    Kung-Fu Hippy from Gangsta City 91 LTD's Avatar
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    Why an H pipe and not an X?


    1991 Crown Victoria LTD, Puff the Magik Dragon

  17. #17
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    Why would he need an X pipe? It costs more money and unless you're pumping out high HP numbers, you won't see a difference when using an H-pipe.

    '85 2-Door Crown Victoria
    302 HO, -0.022" E7 Heads, Weiand Dual Plane Intake, Edelbrock 1406 Carb, Mechanical Fuel Pump, HEI Distributor, 180* T-stat, Transgo Shift Kit, HO Governor, Lokar TV/Throttle Cable Setup, B&M Torq Master 2000 RPM Stall Converter, FRPP Trans Cooler, Mustang Shorty Headers, 2.25" Dual Exhaust, Flowtech H-pipe (no converters), Hooker AeroChamber Mufflers, Side-exit Exhaust w/ Chromed 2.5" Tips, '02 PI F/R Shocks, Cut 2004 PI Front Springs in the Rear, PI Rear Sway Bar, 17" SAP Wheels, 245/50/Z17 Michelin Pilot A/S Tires, Cold A/C, Cruise Control, 4.10 Rear End Gears, Trac Lok Diff.
    '04 Crown Victoria LX Sport, '02 Jeep Liberty
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  18. #18
    ... mrltd's Avatar
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    Quote Originally Posted by 91 LTD
    Why an H pipe and not an X?
    Cheaper, and not much of a difference at low HP levels.
    Builder/Owner of Badass Panther Wagons

    Busy maintaining a fleet of Fords

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