Exhaust suggestions?

Discussion in 'The Bench' started by The Big Guy, Jan 30, 2020.

  1. LARRY70GS

    LARRY70GS a.k.a. "THE WIZARD" Staff Member

    Yeah, I really doubt they would fit without at least some tweaking. The Wheelz tips actually get wider towards the end where the pipe attaches, and as you move them out, you quickly run out of clearance. I wanted them to extend as much as possible, but I found that I really didn't have the room I needed. The minimal clearance made them rattle. What I ended up doing was to rest the lower edge of the tip against the lower edge of the opening. I cushioned it with plastic door edge molding. That allowed a decent amount of extension and enough clearance up top so they didn't rattle.

    photo (8).JPG photo (9).JPG DSCF0109A.jpg
     
  2. CMCE

    CMCE Well-Known Member

    They look great on your GS. And it sounds great too!
     
  3. Mark Demko

    Mark Demko Well-Known Member

    I have those on my 350 GS, they are louder than the 17749's I had.
    To me they're not quiet.
     
  4. johnriv67

    johnriv67 Well-Known Member

    I have those 17222 type Ultra flows on my Riviera.
     
    Mark Demko likes this.
  5. Mark Demko

    Mark Demko Well-Known Member

    Pretty much sounds like mine:D
     
  6. CMCE

    CMCE Well-Known Member

    Just for clarification, the 17222 and 17749 are two completely different style mufflers. 17222 is an 'Ultra Flo', while the 17749 is a 'Super Turbo'. The Ultra Flo is a perforated tube straight-thru muffler, and is just about the highest flowing muffler on the market. Racers love them, F.A.S.T class racers use them, but they are NOT quiet. That particular 17222 muffler will support 910 HP before any loss in power is noticed. Dynomax refers to this rating as "Loss Free HP", and there are several 3" models that will support 2000 HP.
    The 17749 muffler that you had is the longest of the Super Turbos (20") and the quietest. It will support 386 HP before any power loss is noticed. It is an awesome street muffler. The Super Turbos were originally designed by David Vizard and rolled out under the 'Sonic Turbo' name. After Walker bought Cyclone, the name was changed to 'Super Turbo'. The internal 'Flow Directors' eliminates the turbulence as the exhaust reverses direction twice to pass through 3 internal flow tubes. It's a very efficient street muffler. For comparison sake, your typical 2.5" 40 series Flowmaster will support around 340-350-HP before any power loss is noticed.
     
    Last edited: Feb 7, 2020
    Mark Demko and dynaflow like this.
  7. Gary Bohannon

    Gary Bohannon Well-Known Member

    Good info CMCE.
    My 17222 mufflers are comparativly quiet after listening to my friends flowmasters (awfull noise) even though he has an x pipe.
    I have an x pipe that helps my Walkers, but there is no "drone" at any speed. Their perfect for me.
    Maybe the pading under my carpet is making them "quiet"!
     
  8. Gary Bohannon

    Gary Bohannon Well-Known Member

  9. CMCE

    CMCE Well-Known Member

    Gary, if you want more specific information about Walker Dynomax mufflers, I've provided a spec sheet for all of their mufflers here- https://classicmusclecarexhaust.com/i/exhaust-101. There's a link in the Dynomax section that gives the SCFM and HP levels of each muffler. One thing though, that 'Loss Free HP' rating is NOT the HP limit of the muffler. It's the upper level at which the muffler has NO affect on HP. It's only after that rating does the muffler start costing HP.

    As far as Drone goes, it usually happens in the 1800-2300 RPM range, and there are many factors such as engine combination, exhaust tubing diameter, and muffler design that add to it. Generally cars with axle ratios in the 2's to lower 3's suffer more because the gearing puts them right in that RPM range while cruising. Factory mufflers are designed to eliminate it, but it's not the top priority for most aftermarket high-performance mufflers. Some do a good job with drone, some do not, but it all comes down to engine/gearing combination.
     
  10. sean Buick 76

    sean Buick 76 Buick Nut

    No drone with magnaflow
     
  11. CMCE

    CMCE Well-Known Member

    Although I've had customers say the opposite on occasion, that is generally a very true statement. Remember though, MagnaFlows come in 4 different case lengths, 14, 18, 22, & 24". All same design, just different lengths. I've heard the 22's sound just slightly louder than factory (but with a completely different tone) on a stock 318 engine, and I've heard the 14's nearly rattle the fillings out of my mouth on a radical BB Chevy. There are so many factors that determine the sound of an exhaust system.
     
  12. LARRY70GS

    LARRY70GS a.k.a. "THE WIZARD" Staff Member

  13. johnriv67

    johnriv67 Well-Known Member

    No drone with my Ultra flows
     
  14. CMCE

    CMCE Well-Known Member

    Yeah, it's rare that someone complains about drone with MagnaFlows. I would have to think that it's their Stainless mesh and 'Acustic Fiber Fill' that kills the drone. There are plenty of similar straight-thru designs out there, and not all are as resistant to drone as MagnaFlow.
     

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