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1971 stock muffler modification?
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OB Bus
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PostPosted: Fri Jun 02, 2017 2:00 pm    Post subject: Re: 1971 stock muffler modification? Reply with quote

asiab3 wrote:

Those one-piece circle clamps are inherently flawed, I'll try to find the thread on why…
Robbie


They are flawed because to get them on you need one hand to hold them closed enough to line up a bolt, one hand to steady the bolt and one hand to work the wrench. That is one more hand than I have. And my hands and fingers are pudgy. Also working that close causes heck with the bifocals. (Wait, is this the old man rant topic????)
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1970fun
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PostPosted: Sat Jun 03, 2017 12:38 am    Post subject: Re: 1971 stock muffler modification? Reply with quote

1970fun wrote:
Still running and loving it, i had a vintage speed as well but these are too loud and too restrictive!
I started with a new Ernst muffler and found the 2 NOS pipes on a swapmeet.
I would go for Ernst or Leistriz as Dansk is not really a quality muffler, feel the weight between them Shocked
It even fits with a towbar, maybe i can post a sound video next week.


I can shoot a video this weekend, mind you i'm running a 1775 with a 37mm carb, further stock.
For a even better flow you could remove the sieves from where cilinder no 1 and 3 are connected just like oettinger did on their 2 litre type1 engines, but that makes it allot louder i did that with another exhaust that was comming of a original Oettinger 2 litre engine that had a leistriz with the sieves allready removed.
The brackets are simply to fabricate, just a piece of flatbar and 2 U-shaped exhaust clamps.
You have to weld 2 pieces of flabar at ech side of the exhaust where you can mount the 2 bolted on brackets. if you need mesuraments than i have to crawl under the bus Wink
I did the positioning and welding on the bus so that the right side is exactly the same as the left side as you don't have any refference points to hold on to if it is outside the bus.
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Bulli Klinik
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PostPosted: Sat Jun 03, 2017 9:06 am    Post subject: Re: 1971 stock muffler modification? Reply with quote

Could you please post photos of the Oettinger modified exhaust? I have an Okrasa motor from 66 which doesn't have the original exhaust and would like to return it to original.
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Thanks!
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Brian
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PostPosted: Sat Jun 03, 2017 4:47 pm    Post subject: Re: 1971 stock muffler modification? Reply with quote

Gary, we'll see if we can find you a good one tomorrow if you haven't gotten any leads on some other ones.
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PostPosted: Sat Jun 03, 2017 7:19 pm    Post subject: Re: 1971 stock muffler modification? Reply with quote

Brian wrote:
Gary, we'll see if we can find you a good one tomorrow if you haven't gotten any leads on some other ones.


Better thought: Gary, come to the Pomona Swap with us tonight or tomorrow!
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aeromech
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PostPosted: Sat Jun 03, 2017 8:41 pm    Post subject: Re: 1971 stock muffler modification? Reply with quote

Nice of you to offer guys. Keep a look out. Text me if you find something. I appreciate it.
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PostPosted: Sat Jun 03, 2017 8:59 pm    Post subject: Re: 1971 stock muffler modification? Reply with quote

aeromech wrote:
Nice of you to offer guys. Keep a look out. Text me if you find something. I appreciate it.


Come on Gary! Just because you recently celebrated the big 60 doesn't mean you can't go out to Pomona and show those young millennial whippersnappers how the baby boomers can tear it up and party!

Go represent us proudly! Laughing Laughing
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PostPosted: Sat Jun 03, 2017 9:14 pm    Post subject: Re: 1971 stock muffler modification? Reply with quote

I'm a busy man. Just got back from spending a free night at the casino. Then I rebuilt some drive shafts on a Vanagon. In the morning I have a new 1968 bus owner coming by to meet me at 10 and at noon I have a 1971 bus coming out of the paint shop. I might be able to be free between 2:45 and 3:15 tomorrow.
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PostPosted: Sun Jun 04, 2017 1:57 am    Post subject: Re: 1971 stock muffler modification? Reply with quote

OB Bus wrote:
asiab3 wrote:

Those one-piece circle clamps are inherently flawed, I'll try to find the thread on why…
Robbie


They are flawed because to get them on you need one hand to hold them closed enough to line up a bolt, one hand to steady the bolt and one hand to work the wrench. That is one more hand than I have. And my hands and fingers are pudgy. Also working that close causes heck with the bifocals. (Wait, is this the old man rant topic????)


What about the hand to hold up your pants?? Or have you figured out how to stitch your Depends to your pants to solve that problem! Enjoy youth while you can. Time to watch Matlock...
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1970fun
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PostPosted: Fri Jun 09, 2017 4:08 am    Post subject: Re: 1971 stock muffler modification? Reply with quote

Bulli Klinik wrote:
Could you please post photos of the Oettinger modified exhaust? I have an Okrasa motor from 66 which doesn't have the original exhaust and would like to return it to original.
Image may have been reduced in size. Click image to view fullscreen.

Image may have been reduced in size. Click image to view fullscreen.


Thanks!


Sorry i don't have that exhaust anymore, the sieves were removed that's all i can tell about it.
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Dubbin68
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PostPosted: Wed Jun 13, 2018 9:41 am    Post subject: Re: 1971 stock muffler modification? Reply with quote

I'm sorry to revive this, but what is the verdict on putting bus dampers on a bettle muffler? I've read through dozens of threads, however no one offers a "yes they'll fit the muffler" or "no they wont" answer.

Previously in this thread someone was going to try to mount a bus damper on a beetle muffler, however he never followed it up.

Is the diameter of the bus damper the same as the diameter of the beetle muffler opening? Or is is off by a 1/4-1/2 inch.

Thanks for your responses.
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ToolBox
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PostPosted: Thu Jun 14, 2018 10:15 am    Post subject: Re: 1971 stock muffler modification? Reply with quote

Dubbin68 wrote:
I'm sorry to revive this, but what is the verdict on putting bus dampers on a bettle muffler? I've read through dozens of threads, however no one offers a "yes they'll fit the muffler" or "no they wont" answer.

Previously in this thread someone was going to try to mount a bus damper on a beetle muffler, however he never followed it up.

Is the diameter of the bus damper the same as the diameter of the beetle muffler opening? Or is is off by a 1/4-1/2 inch.

Thanks for your responses.


Bus damper is smaller, you could always have a bushing made and welded to Bus dampers to install on a Bug muffler.
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PostPosted: Thu Jun 14, 2018 10:26 am    Post subject: Re: 1971 stock muffler modification? Reply with quote

If by bus damper you mean the single muffler-tailpipe, it was designed to hold down bus RPM's. The bus single muffler-tailpipe will give a noticeable drop in power but engines will last longer because it can't be pushed as hard.
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Zed999
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PostPosted: Thu Jun 14, 2018 12:16 pm    Post subject: Re: 1971 stock muffler modification? Reply with quote

I'm fairly sure bus tail pipes do fit the beetle muffler, I ran that setup on one of my engines with the tail pipes shortened.
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aeromech
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PostPosted: Thu Jun 14, 2018 1:05 pm    Post subject: Re: 1971 stock muffler modification? Reply with quote

Bug muffler. T3 dampers with some welding done to fit.

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Image may have been reduced in size. Click image to view fullscreen.


Image may have been reduced in size. Click image to view fullscreen.


Image may have been reduced in size. Click image to view fullscreen.


Image may have been reduced in size. Click image to view fullscreen.


Soon I'm going to have the dampers flame sprayed at the powder coating place.
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PostPosted: Thu Jun 14, 2018 1:18 pm    Post subject: Re: 1971 stock muffler modification? Reply with quote

That looks a little weird but is sure is a nice job!


I don't know if you looked in the muffler where it goes to the heater boxes but I had my Leistritz off the other day and it is really restricted right off the bat! There are just little slots cut in a star pattern there forming the first restrictor. Makes worrying about ID etc useless.
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PostPosted: Thu Jun 14, 2018 1:28 pm    Post subject: Re: 1971 stock muffler modification? Reply with quote

It's an 1800 engine. The idea was to allow more flow and keep the advantages of a stock muffler for carb heat. I plan to level out the dampers so they have less of a down angle by cutting off the left rear tie down from the bumper support.
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PostPosted: Tue Jan 15, 2019 10:12 am    Post subject: Re: 1971 stock muffler modification? Reply with quote

What is the O.D. of the T3 tail pipe/dampner pipe that you used?

I tracked down parts to make both tail pipe/dampners, but it is the 2-piece setup up to '71 T3 (1-3/8" O.D.). Fits perfectly into the bug outlet exhaust openings and slip inside smoothly.

I see there are the one-piece T3 tail pipe/dampners, but I am only finding those with a 1-5/8" O.D. which won't slip into the bug outlet exhaust openings.

Does anyone see any advantage to modifying the stock bug outlet exhaust openings to accommodate the 1-5/8" O.D. T3 one-piece tail pipe/dampner (and allow them to slip into the opening properly)? I figure no, because the rest of the exhaust system is still limited by the stock sized heater boxes and stock sized heads?
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PostPosted: Mon Jan 21, 2019 10:21 am    Post subject: Re: 1971 stock muffler modification? Reply with quote

I took my T3 dampers to RW Little, a local powder coating company. They applied "flame spray". Here's how they look

Image may have been reduced in size. Click image to view fullscreen.


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Image may have been reduced in size. Click image to view fullscreen.


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Image may have been reduced in size. Click image to view fullscreen.


Image may have been reduced in size. Click image to view fullscreen.

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PostPosted: Tue Jan 22, 2019 2:46 pm    Post subject: Re: 1971 stock muffler modification? Reply with quote

Damn! That looks good!
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