547 Carrera Street Exhaust
- Harlan Halsey
- 356 Fan
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547 Carrera Street Exhaust
I thought it would be useful to be able to drive the GT Carrera on the street, but the P-Shooter exhaust is way too noisy. Of course, there was a standard street exhaust complete with heat exchangers for the GS cars, but I wanted, a much simpler exhaust which would simply substitute for the P-Shooter. The obvious solution was to fabricate a copy of the Porsche 356C exhaust which would interface directly with the 5/8" P-Shooter headers. I found a diagram of the internals of the 356 exhaust, it has three chambers, with three internal tubes and three baffles.
The End sections were lengthened, and the overall length shortened to 356A muffler size.
I retained the 356 C center output and the S-pipes. It would be easy to move the output pipes to the 11" spacing, of the 356A and I had intended to do that to see what difference it made to the loudness, but I probably won't get around to that any time soon.
The tail pipes are chrome powder coat which is difficult to tell from chrome plate and a lot easier to fabricate. The muffler is sufficiently quiet to drive on the street, which was the objective.
The End sections were lengthened, and the overall length shortened to 356A muffler size.
I retained the 356 C center output and the S-pipes. It would be easy to move the output pipes to the 11" spacing, of the 356A and I had intended to do that to see what difference it made to the loudness, but I probably won't get around to that any time soon.
The tail pipes are chrome powder coat which is difficult to tell from chrome plate and a lot easier to fabricate. The muffler is sufficiently quiet to drive on the street, which was the objective.
Last edited by Harlan Halsey on Fri Jan 06, 2023 5:34 am, edited 1 time in total.
- Martin Benade
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Re: 547 Carrera Street Exhaust
How loud is it compared to a 616? Could you share the C muffler diagram? Looks like you came up with a good solution to the noise.
Cleveland Ohio
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56 VW
02 IS 300
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62 Cabriolet
56 VW
02 IS 300
04 Sienna
- Harlan Halsey
- 356 Fan
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Re: 547 Carrera Street Exhaust
I knew the loudness question would come up and I don't have a good answer. It's quiet enough to drive on the street. As for the diagram,
I added it.
I added it.
Last edited by Harlan Halsey on Tue Nov 07, 2023 5:09 am, edited 1 time in total.
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Re: 547 Carrera Street Exhaust
Very cool, Harlan. Miss my 59 GT coupe. Happy to say that after being squashed like a bug and totaled in the disastrous Road Scholars explosion, it is being fully restored in the Netherlands at great expense, but will rise like a Phoenix from the ashes fairly soon.
- Greg Bryan
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Re: 547 Carrera Street Exhaust
Harlan - did the 4-cam muffler have a retaining strap on it similar to the Euro exhaust pushrod motors?
Greg Bryan
- Harlan Halsey
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Re: 547 Carrera Street Exhaust
Greg,
There are small, about 1/2" dia., struts which lead from the generator stand mounting studs down through the tray to bands around the exhaust can. Slightly different between the 60 deg V drive and the 90 deg V drive. I duplicated these to support the muffler off the block. Similar function to the 356 Euro exhaust support.
There are small, about 1/2" dia., struts which lead from the generator stand mounting studs down through the tray to bands around the exhaust can. Slightly different between the 60 deg V drive and the 90 deg V drive. I duplicated these to support the muffler off the block. Similar function to the 356 Euro exhaust support.
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Re: 547 Carrera Street Exhaust
Be very careful the exhaust drastically effects the low rpm response of the motor. Alan The Stable.
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Re: 547 Carrera Street Exhaust
Dear guys,
I have two different 547/692 exhausts except the pee shooter, a street one with two pipes and a Sebring with a great sound which works on the street as well,
regards from Germany
Peter
www.classic-parts.com
I have two different 547/692 exhausts except the pee shooter, a street one with two pipes and a Sebring with a great sound which works on the street as well,
regards from Germany
Peter
www.classic-parts.com
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Re: 547 Carrera Street Exhaust
Be very careful with the exhaust too frre flowing and you can say good bye to any good low=end power. Alan The Stable.
- Harlan Halsey
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Re: 547 Carrera Street Exhaust
Alan, I don't think that with the roller crank I would use the words low end and power in the same sentence. Carrera 2s may lug around, but my A Carrera only has power above 4,000. Back in the day, service amounted to changing the clutch disk and the plugs every 8,000 miles, so this is nothing new. The purpose of this muffler is only to let me exercise the car a bit between races. It does that.
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Re: 547 Carrera Street Exhaust
The street exhaust is fine and original but what a bear to fit and install!! Alan The Stable.
- Harlan Halsey
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Re: 547 Carrera Street Exhaust
My objection to the Carrera street exhaust is simply to the weight and complexity of the thing.Alan Klingen 2 wrote: ↑Mon Nov 27, 2023 3:30 pm The street exhaust is fine and original but what a bear to fit and install!! Alan The Stable.
- Martin Benade
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Re: 547 Carrera Street Exhaust
[quote="Harlan Halsey" post_id=446227
[/quote]
My objection to the Carrera street exhaust is simply to the weight and complexity of the thing.
[/quote]
It shares those qualities with the Carerra engine; it’s perfect.
[/quote]
My objection to the Carrera street exhaust is simply to the weight and complexity of the thing.
[/quote]
It shares those qualities with the Carerra engine; it’s perfect.
Cleveland Ohio
62 Cabriolet
56 VW
02 IS 300
04 Sienna
62 Cabriolet
56 VW
02 IS 300
04 Sienna
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- 356 Fan
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Re: 547 Carrera Street Exhaust
The 4cam becomes almost un-drivable it will lose all it's low-end power. Alan The Stable.
- Joris Koning
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Re: 547 Carrera Street Exhaust
Having first hand experience with the 547 street system I can say its a total bear to install. Putting the engine in the car is virtually impossible without at least some scratches.
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