IAC Greetings From Texas Hill Country (upd 0908)

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56ovalbug
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Re: IAC Greetings From Texas Hill Country (upd 0908)

Post by 56ovalbug » Thu Sep 09, 2010 2:24 pm

Amskeptic wrote: Image
Pretty.... but so much more complicated than the simple '72-'74 exhaust setup.
Joey

'56 Beetle|'65 Beetle|'74 Bus|'79 Panel|’60 Kombi

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sped372
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Re: IAC Greetings From Texas Hill Country (upd 0908)

Post by sped372 » Thu Sep 09, 2010 3:39 pm

56ovalbug wrote:the simple '72-'74 exhaust setup.
Nice, but so much more complicated than the '68-'71 setup. :blackeye:
1971 Karmann Ghia - 1600 DP
1984 Westfalia - 1.9 WBX

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Sylvester
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Re: IAC Greetings From Texas Hill Country (upd 0908)

Post by Sylvester » Thu Sep 09, 2010 4:09 pm

sped372 wrote:
56ovalbug wrote:the simple '72-'74 exhaust setup.
Nice, but so much more complicated than the '68-'71 setup. :blackeye:
Yeah baby!

Image
Up, up the long, delirious, burning blue, I’ve topped the wind-swept heights with easy grace. Where never lark, or even eagle flew. And, while with silent, lifting mind I've trod, The high untrespassed sanctity of space, Put out my hand, and touched the face of God.

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Amskeptic
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Re: IAC Greetings From Texas Hill Country (upd 0908)

Post by Amskeptic » Thu Sep 09, 2010 7:16 pm

Sylvester wrote:
sped372 wrote:
56ovalbug wrote:the simple '72-'74 exhaust setup.
Nice, but so much more complicated than the '68-'71 setup. :blackeye:
Yeah baby!

[img]ma[/img]
NO! Not quite! The '72-'74 is THE elegant exhaust system of all time.
Three components!
You Type 1 people are always whining and with good reason about those rear "exchangers" not fitting with the collars for the fresh air hoses, and the donut gaskets deteriorating and pinching under the mustache bar and the heat riser flanges not lining up, and the damper pipe bracket not fitting on the perimeter of the damper pipe not to the mention the muffler, oh, on and on.
Colin :bom:
BobD - 78 Bus . . . 112,660 miles
Chloe - 70 bus . . . 206,845 miles
Naranja - 77 Westy . . . 129,490 miles
Pluck - 1973 Squareback . . . . . . 55,570 miles
Alexus - 91 Lexus LS400 . . . 94,225 miles

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Hippie
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Re: IAC Greetings From Texas Hill Country (upd 0908)

Post by Hippie » Fri Sep 10, 2010 5:04 am

Amskeptic wrote: Any luck with jacket experiments, Dick? I am thinking why not get outer aluminum flex pipes that are so huge they actually do fit over the flanges, then crush them down with ViseGrips so as to have a "seam" where the ViseGrips mash 'em. Then, what to do with rattling looseness?
ColinTooTiredToThink
What are we making here? Outer skins for heat exchanger cores?
I love to invent and fabricate, so I'm intrigued.

Would fiberglass/resin take the heat?

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Amskeptic
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Re: IAC Greetings From Texas Hill Country (upd 0908)

Post by Amskeptic » Fri Sep 10, 2010 9:14 am

Hippie wrote: What are we making here?
Simple jackets for those stupid u-tubes.

Triangular flanges are welded to serious high carbon steel that changes the direction of the exhaust 180* in a matter of inches. The original jackets managed to drop the radiating temperatures a good 100*.

The original jackets were bead welded to the flanges with an all important air gap between the jacket and the pipe underneath.
Colin
BobD - 78 Bus . . . 112,660 miles
Chloe - 70 bus . . . 206,845 miles
Naranja - 77 Westy . . . 129,490 miles
Pluck - 1973 Squareback . . . . . . 55,570 miles
Alexus - 91 Lexus LS400 . . . 94,225 miles

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Hippie
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Post by Hippie » Fri Sep 10, 2010 12:32 pm

Hmmmm...I think something could be done without too much trouble.
Pictures would be nice.

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Amskeptic
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Post by Amskeptic » Fri Sep 10, 2010 6:53 pm

Hippie wrote: Pictures would be nice.
Image

Think: jacket around the those curvy pipes. Have a 1/4"- 3/8" gap between the extant pipes and the jacket-to-be. The original manifolds on this car still have the jackets on them. Very tidy looking. I think they may have fiberglass in between the jackets and the pipes.
Colin
BobD - 78 Bus . . . 112,660 miles
Chloe - 70 bus . . . 206,845 miles
Naranja - 77 Westy . . . 129,490 miles
Pluck - 1973 Squareback . . . . . . 55,570 miles
Alexus - 91 Lexus LS400 . . . 94,225 miles

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Hippie
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Post by Hippie » Sat Sep 11, 2010 8:17 am

I'm thinking a curved "box" with a square cross section would be easiest to make.

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dtrumbo
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Post by dtrumbo » Sat Sep 11, 2010 8:33 am

I'm intrigued. I would think square would be harder to make the curve. What type of material are you thinking?
- Dick

1970 Transporter. 2015cc, dual Weber IDF 40's
1978 Riviera Camper. Bone stock GE 2.0L F.I.
1979 Super Beetle convertible.

... as it turns out, it was the coil!

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Elwood
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Post by Elwood » Sat Sep 11, 2010 10:55 am

Diet Coke Cans would be my guess.

Barb thinkin green :flower:
'69 weekender ~ Elwood

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Hippie
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Post by Hippie » Sat Sep 11, 2010 3:55 pm

dtrumbo wrote:I'm intrigued. I would think square would be harder to make the curve. What type of material are you thinking?
Prolly galvanized or else 18 gauge mild steel. I'll se if I can come up with a sketch. Do they need to be bolt-on removable or weld on?

I think a outside curve and and inside curve would be easy to bend out of flat stock. Then a U shaped top and bottom.

It's pretty hard to bend tubing that sharp.
Elwood wrote:Diet Coke Cans would be my guess.

Barb thinkin green :flower:
Not me. Sugar Coke only for me! :blackeye:

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dtrumbo
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Post by dtrumbo » Sat Sep 11, 2010 4:15 pm

I totally get it now. You're right, it's a lot easier to bend flat sheet metal than it is tubing or hose or even a Diet Coke can.

As far as their being able to be removed... I think it would be easier if they could be bolted on rather than welded (I just got a welder for my birthday, but I have no idea how to use it yet). I don't think there's any need to take them on and off, unless you're Colin and you need to paint and wax your U-tubes out in the middle of nowhere while the cops watch. :joker:

I'm still thinking using one or more of the three triangle-flange bolts as part of the mounting system might be a way to go.

Thanks for jumping in on this. I was going nowhere fast trying to find hose with an appropriate temp. rating that had a tight enough bend radius.
- Dick

1970 Transporter. 2015cc, dual Weber IDF 40's
1978 Riviera Camper. Bone stock GE 2.0L F.I.
1979 Super Beetle convertible.

... as it turns out, it was the coil!

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Hippie
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Post by Hippie » Sat Sep 11, 2010 5:11 pm

Sure.

This is rough...it needs spacers and some sort of end covers. Rather than the welds at both top and bottom, the bottom could be flanged over and attached with sheet metal screws.

Image

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Amskeptic
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Post by Amskeptic » Sun Sep 12, 2010 10:30 am

Hippie wrote:Sure.

This is rough...it needs spacers and some sort of end covers. Rather than the welds at both top and bottom, the bottom could be flanged over and attached with sheet metal screws.
Interesting. Think of serious heat and vibration here and add water splash that hyper-cools the jacket for an instant. The pipes have been up in the 500-700* range in my limited experience.
Colin
BobD - 78 Bus . . . 112,660 miles
Chloe - 70 bus . . . 206,845 miles
Naranja - 77 Westy . . . 129,490 miles
Pluck - 1973 Squareback . . . . . . 55,570 miles
Alexus - 91 Lexus LS400 . . . 94,225 miles

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