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modok
Samba Member
Joined: October 30, 2009
Posts: 26790
Location: Colorado Springs
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 Posted: Sat May 02, 2015 7:20 pm Post subject: |
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It's not difficult to make a muffler quieter than the intake roar.
Not much point in going quieter until you muffle the caruretors!! which can be done also, but usually isn't. |
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stault
Samba Member
Joined: September 19, 2003
Posts: 205
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| Posted: Sun May 03, 2015 4:06 am Post subject: |
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Modok, you've always given sound advice, truer words were never said.When I was building my project I tried to think through every choice I made but I was surprised by some of the out come, some good and gee I didn't know that was going to happen. I'm a musician, did pro sound, and opted to put a nice sound system in my bug not knowing that my selection of dual dellorto carbs would compete with it. I doubled the layer of sound deadening material
and it helped some. I also pondered getting a set of those cans they use for turbos and routing hoses some where to feed them. I did think about the CPS air box they sell but I have a Berg linkage that works great and I don't see how it would work with their system, it's not to bad when I roll the windows down or slide the top back |
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jl_1303
Samba Member
Joined: July 01, 2006
Posts: 569
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| Posted: Sun May 03, 2015 5:46 pm Post subject: |
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In my case, however, the muffler sound is way louder than that of the carbs.
From what I have read, rarely do performance exhaust systems have much to do with being quiet.
I wonder if there are other Samba members who are in need of a Performance Exhaust System that is also quiet. |
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modok
Samba Member
Joined: October 30, 2009
Posts: 26790
Location: Colorado Springs
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| Posted: Sun May 03, 2015 5:54 pm Post subject: |
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The muffler also can work like the tone knob. glasspacks take out most of the high frequencies but leave the LOWs. Not only do the low frequencies cause DRONE but......
General human nature to find LOW frequencies more annoying/threatening than higher ones.
SO, I like to use chamber mufflers with a short tailpipe. It can be loud, but I get no complaints at all from neighbors or cops! My favorite design of muffler is the three chamber dogleg type, made by flo-pro, and also many other brands. |
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air-h2o-air
Samba Member
Joined: January 25, 2015
Posts: 579
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| Posted: Sat Aug 01, 2015 9:03 pm Post subject: |
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| jl, dual qp mufflers are very quiet...you will not disturb your neighbors. They idle and run quiet at speed and have no drone(well mine never have). They do have a bit deeper tone than a stock muffler...and there is no fweeeem from dual qps |
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jl_1303
Samba Member
Joined: July 01, 2006
Posts: 569
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| Posted: Sun Aug 02, 2015 5:11 pm Post subject: |
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| air-h2o-air wrote: |
| jl, dual qp mufflers are very quiet...you will not disturb your neighbors. They idle and run quiet at speed and have no drone(well mine never have). They do have a bit deeper tone than a stock muffler...and there is no fweeeem from dual qps |
I have been trying to get a DQP from Berg, but was advised that a DQP that would match my header flange is not available. |
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jl_1303
Samba Member
Joined: July 01, 2006
Posts: 569
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| Posted: Sun Aug 02, 2015 5:14 pm Post subject: |
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| Alstrup wrote: |
JF. The Super Comp is a very nice muffler system. But it - is - after all only 1˝" primaries and with a short collector, which means that it is designed for engines up to about 130 hp. I have built several 1914 - 2054 cc engines that pulled in the 143-147 hp range with it, and it works well. But consider that peak of what it will support.
WRT 2 in line mufflers. Something like this, http://www.ahnendorp.com/VW-Typ-4---Porsche-914-Mo...l.htmlonly I usually use 2 or 2˝" Simons straight through mufflers, because I like the sound of these and they are reasoanbly priced, over here at least. I guess Apple mufflers would´nt be a bad choice either.
T |
I am also seriously considering ordering this setup for a type 1 from Ahnendorp Germany. Can anyone provide more information on this? |
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vugbug68
Samba Member
Joined: June 25, 2006
Posts: 2696
Location: sacramento
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| Posted: Sun Aug 02, 2015 6:15 pm Post subject: |
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I have that same Berg merged header but with a Bugpack hideaway muffler, it is pretty quiet. Quieter than a single quiet pack
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