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63 Avanti Exhaust

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  • 63 Avanti Exhaust


    I have one more question regarding the exhaust system for an R1 Avanti. Basically, the previous owner put on a new system and it sounds real loud, as if the muffler has a hole in it. Being an Avanti novice, is this how it is supposed to sound ?? Thank you..

  • #2
    there were several options for an Avanti exhaust, but the "standard" exhaust was dual pipes without a crossover and glasspack mufflers, so yes, it was fairly loud.

    nate

    --
    55 Commander Starlight
    62 Daytona hardtop
    http://home.comcast.net/~njnagel
    --
    55 Commander Starlight
    http://members.cox.net/njnagel

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    • #3
      And the problem with that is????
      As we Hog riders say,loud pipes save lives.You should hear my 88" Twin Cam through her Screaming Eagle exhaust,people notice me coming(G)

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      • #4
        Did I say it was a problem?

        Seriously I am running the same basic setup on my '62 Lark and it sounds good at most speeds but there is a decent resonance at about 45-50 MPH. I would probably change to "real" mufflers were I driving it every day.

        nate

        --
        55 Commander Starlight
        62 Daytona hardtop
        http://home.comcast.net/~njnagel
        --
        55 Commander Starlight
        http://members.cox.net/njnagel

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        • #5
          When I bought my '63 Avanti about two years ago it had a stainless steel 2" exhaust on it with glass packs AND a crossover. I don't consider it loud at all. My only comment to the (be nice now) guy who sold me the car is "why go to all the stainless expense and not put in a 2-1/4" exhaust". A 2-1/4 inch diameter is at least 25 percent larger in cross sectional area than is a 2" diameter. I'd never had a car with a crossover before and I gather from earlier comments that the purpose is to reduce the noise. As I say mine is not objectionable at all--even on a long trip and the car does not have air. The only drawback to the crossover that I can see is when you go to remove the exhaust when laying on your back under the car--especially when over 60 years of age--I hope I still think I'm a kid the day I die, but that is unlikely.
          wagone/waygone in Iowa

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          • #6
            I was told by an exhaust specialist that the cross-over is used to ensure optimum scavenging effect.
            / H

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            • #7
              I agree that 2.25 inch pipes are 25% larger than 2 inch pipes, but I don't think that anything bigger than 2 inch duals is necesssary, or helpful, on a stock Studebaker 289 V8 (especially with a balance pipe). IMHO, you would have to change the exhaust manifolds to something that flows better than stock and probably have to improve the intake manifold and valves to make use of bigger than 2 inch dual exhausts.
              Gary L.
              Wappinger, NY

              SDC member since 1968
              Studebaker enthusiast much longer

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              • #8
                The crossover both improves scavenging and quiets the exhaust some. It makes more power, but you lose a little bit of that aggressive tone... win some, lose some...

                I've talked to Don Simmons and had thoughts about using a crossover on various projects and he seemed to think that the slight power gains weren't worth it. I think we discussed this with "studebakerbob" over on JP's site, sadly that discussion has been lost what with his site being hacked and all.

                nate

                --
                55 Commander Starlight
                62 Daytona hardtop
                http://home.comcast.net/~njnagel
                --
                55 Commander Starlight
                http://members.cox.net/njnagel

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                • #9
                  http://RacingStudebakers.com
                  Sonny
                  http://RacingStudebakers.com

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                  • #10

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                    • #11
                      Many years ago,(over 30)when I was circle track racing I was looking at headers for a 259 and ran across an interesting article that a British engineer had come up with to help with the siamesed center exhaust port on the old Austin-Healys(I think). What he proposed doing was adding another closed tube at a specific length on the outlet of the center tube that would reverse the sonic wave and help to scavenge the exhaust gasses.I never followed it up but I thought it might be of interest to someone.

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