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Turbo exhaust manifold?
https://slantsix.org/forum/viewtopic.php?t=18816		 Page 3 of 4
Author:  SlantSixDan [ Sun Jul 30, 2006 10:02 am ]
Post subject: 
Quote:
The $250 was from me.
D'OH! :-( Shoot. Was that the $250 bid, or the $250 "on the table", or both? I meant what I said about not meaning to step on toes. If that $250 bid was yours, then you probably have a use for it in mind (right?) and then you ought to have the manifold setup. My primary main concern was that the manifold be thoroughly documented and not just treated as a trophy-case piece of private-collection art disappearing from the slant-6 enthusiast community forever, does that make sense? (Or, even worse, that it would get hacked and "modified" thus destroying a one-of-none item).
Quote:
I am not sure that the two extra pieces were for this exhaust manifold but maybe for another prototype project.
I dunno...they do have sequential c/numbers.

Send me a PM, I'm sure we can figure out the logistics here without too much trouble.
Author:  Jeb [ Sun Jul 30, 2006 7:27 pm ]
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Dan, do you have a local foundry that would be willing to make reproductions of this manifold?
Author:  SlantSixDan [ Sun Jul 30, 2006 8:15 pm ]
Post subject: 
Interesting idea...I'm not sure what would be involved. I will check into it.
Author:  slantvaliant [ Mon Jul 31, 2006 6:46 am ]
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Dan - please take a lot of good digital photographs, with proper scales and orientation marks ("Front", "Up", "#3", etc). It would really be great if someone could digitally scan the shape, and measure the wall thickness at lots of points with, say, an ultrasound. A flexible mold can be made of the interior. Record the location of parting lines, sprues, datum points if they are present.
There will be a lot of work in making the patterns - ask Doug about the Hyperpak project. It's not just a matter of making a mould of what you have. The finished dimensions are seldom if ever the same as cavity dimensions. Metal does some interesting things as it solidifies.
Even with the finished piece in hand, there will be trial and error in making new copies, and almost certainly several versions and revisions of the patterns before you have an acceptable quality.
Hmmmm ... while your at it, does anyone have a set of Hyperpak exhaust manifolds? :D
Author:  Tom Drake [ Mon Jul 31, 2006 7:30 am ]
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Looking at the position of the flange I have a feeling this manifold was not intended for a passenger car. It looks too close to the firewall to be able to get an 3-4" exhaust pipe under the car.(maybe a tube chassis diesel drag car....;)) If also looks to be VERY thick(ie heavy) to handle the heat generated by a diesel under load. Dan will be able to judge better once he has the pieces in hand.
If the exhuast was for a diesel prototype then the other pieces are from something else. I have never heard of a carb diesel before???
Author:  74W100/6 [ Mon Jul 31, 2006 9:15 am ]
Post subject:  Turbo slant
I was kind of curious what was used for a turbo slant for fuel delivery. Iv heard that you cant put turbos behind carburetors because you will blow seals and gaskets on the carb. Was the carb behind the turbo so the air was sucked through or did they use a sort of TBI?
Author:  SlantSixDan [ Mon Jul 31, 2006 10:50 am ]
Post subject: 
Quote:
Looking at the position of the flange I have a feeling this manifold was not intended for a passenger car. It looks too close to the firewall to be able to get an 3-4" exhaust pipe under the car.
I don't understand this reasoning, help me out: The turbo would mount (directly or via an L-adaptor) to the exhaust outlet flange, thus moving the exhaust dumpout upward and forward.
Quote:
also looks to be VERY thick(ie heavy)
Donno, looks about as heavy/thick as a regular slant-6 exhaust manifold.
Quote:
If the exhuast was for a diesel prototype then the other pieces are from something else.
Sequential casting numbers suggest they are for the same application, to me.
Author:  kesteb [ Mon Jul 31, 2006 10:37 pm ]
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Last year Hot Rod had a picture of a draw-thru setup that was supposedly a factory prototype from the mid '70s. That setup used a BBD. I think you have an exhaust manifold and intake plenum from such a setup. The 1978 Direct Connection Racing manuals also has a picture of a \6 with a draw-thru setup. Those parts look something like what you bought.
Author:  panic [ Tue Aug 01, 2006 7:48 am ]
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Iv heard that you cant put turbos behind carburetors because you will blow seals and gaskets on the carb.

Quite a shock to the pro street cars running in the 8s with exactly that.
Author:  74W100/6 [ Tue Aug 01, 2006 11:38 am ]
Post subject:  turbo 6
what i meant was to have the air forced into the carb rather than sucked through the carb, know what i mean. I was just curious what the setup looked like on the /6 is all.
Author:  SlantSixDan [ Tue Aug 01, 2006 11:56 am ]
Post subject: 
Quote:
Iv heard that you cant put turbos behind carburetors because you will blow seals and gaskets on the carb.
But it's been done, and it's worked. The carburetor has to be fully enclosed so as not to create positive pressure from the inside to the outside of the carb.
Author:  Matadem [ Tue Aug 01, 2006 6:09 pm ]
Post subject:  Re: turbo 6
Quote:
what i meant was to have the air forced into the carb rather than sucked through the carb, know what i mean. I was just curious what the setup looked like on the /6 is all.
http://www.turbomustangs.com/car_images ... Turbo8.jpg
Author:  74W100/6 [ Tue Aug 01, 2006 7:33 pm ]
Post subject:  Turbo 6
I wasnt saying it absolutely positively cant be done because without a doubt youll blow your carb to pieces. I was just wondering if what i heard was true about blowing seals. I wasnt trying to prove anyone wrong or anything, i havent been doing mechanics for 20 or 30 years like the rest of you, im still learning, you see? I was simply ASKING a question, but thanks for all the educational responses, i do know now that you can turbo charge your carbureted engine this way without causing damage. Thanks guys!
Author:  Joshie225 [ Wed Aug 02, 2006 9:34 am ]
Post subject:  Re: Turbo 6
Quote:
I wasnt saying it absolutely positively cant be done because without a doubt youll blow your carb to pieces. I was just wondering if what i heard was true about blowing seals. I wasnt trying to prove anyone wrong or anything, i havent been doing mechanics for 20 or 30 years like the rest of you, im still learning, you see? I was simply ASKING a question, but thanks for all the educational responses, i do know now that you can turbo charge your carbureted engine this way without causing damage. Thanks guys!
If you have the carburetor before the turbo you need a dynamic seal on the turbocharger compressor. Then fuel stays out of the turbo bearing, oil stays out of the intake and the turbo is fine.

You can blow through an unenclosed carburetor just fine too. Certain carburetors are easier to use than others in this regard. Studebaker used a modified AFB with their supercharged R-2 engines. This car runs 20 psi through unenclosed carbs and they are still in one piece. http://www.stude.com/Ted/

Yes, we can all see you're still learning. I've only been really working on car about 17 years now as I came into this world in 1973.

I'm going to make a suggestion. Buy, read and reread Performance with Economy by David Vizard.


Have you visited Amazon.com yet and ordered a copy? No? Go do it now!
Author:  Matt Cramer [ Wed Aug 02, 2006 11:44 am ]
Post subject: 
Blowing carb seals was one of the few problems that I didn't have when I tried a blow through carburetor setup. I didn't run it in an enclosure, either. Most of the problems I have, though, were with that particular carb and not something I would generalize with.
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