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Hyper Pak Exhaust Reproduction
https://slantsix.org/forum/viewtopic.php?t=57147		 Page 16 of 16
Author:  GregCon [ Wed Apr 28, 2021 12:59 pm ]
Post subject:  Re: Hyper Pak Exhaust Reproduction
I've mentioned this before, but if you go on Ebay you can type in Toyota minivan V6, or just about any snooze-alert car made, and find SS headers for $139 a set. They don't look too bad from the pics, anyway.

How many people are really putting headers on their minivan? Or their 2009 BMW X3C3POMi?

There have to be at least that many people who would buy a good Slant Six header.
Author:  hyper_pak [ Wed Apr 28, 2021 1:50 pm ]
Post subject:  Re: Hyper Pak Exhaust Reproduction
Agreed, a mass produced SS header could be cheap.
But think about applications.
225 would be most popular engine.
Chassis would be some type of A body, 67-76.
Then Auto and PS.
Once you had the design, the jig, the welder, etc, the header would be a simple fabrication task.
I am sure clifford has a sub contractor for his part.
So how big would that market be?

Then to consider the different applications, trucks, vans, race cars, manual trans, etc.

Then selling and supporting the product, would take a dealer type deal.
For our engines, there is clifford and aussiespeed. 2 Vendors.

One of the things I dislike about the clifford is the one size fits all, just not well for any application really.
Too many compromises.

And all these exhaust options are cold intake manifold designs, even the HP manifolds.
Author:  Tim Keith [ Thu Apr 29, 2021 1:04 pm ]
Post subject:  Re: Hyper Pak Exhaust Reproduction
Quote:
Agreed, a mass produced SS header could be cheap.
But think about applications.
225 would be most popular engine.
Chassis would be some type of A body, 67-76.
Then Auto and PS.
Once you had the design, the jig, the welder, etc, the header would be a simple fabrication task.
I am sure clifford has a sub contractor for his part.
So how big would that market be?

Then to consider the different applications, trucks, vans, race cars, manual trans, etc.

Then selling and supporting the product, would take a dealer type deal.
For our engines, there is clifford and aussiespeed. 2 Vendors.

One of the things I dislike about the clifford is the one size fits all, just not well for any application really.
Too many compromises.

And all these exhaust options are cold intake manifold designs, even the HP manifolds.
CNC mandrel tube bending machines don't seem to be too expensive anymore, I wouldn't know which one to buy. There might be someone on the H.A.M.B. making small quantities of headers. It could be a viable business model.
Author:  DadTruck [ Tue May 04, 2021 5:12 pm ]
Post subject:  Re: Hyper Pak Exhaust Reproduction
Quote:
cold intake manifold designs,
true, but there is a Clifford slant six intake with a cast in hot water chamber and AussieSpeed has an optional weld on water chamber for their slant six Hurricane intakes.
on my 83 D150 I changed the egr pocket under the carb on a cast aluminum super six intake into a hot water hot spot. Did that as I have dual Dutra's for the exhaust.
With MPFI the need for a hot spot in the intake manifold simply goes away.
So would not get hung up on an exhaust system that does not provide heat to a carburated intake, there are other ways to do it, when necessary.
Author:  DynoDave [ Wed May 26, 2021 5:27 pm ]
Post subject:  Re: Hyper Pak Exhaust Reproduction
This is an interesting topic.

And I'm kind of with the OP. Stainless shorties would be nice. But also like the OP, I want a certain "look", and in my case, sound. I'm loathe to give up on my factory gear reduction starter.

So HyperPak manifolds are out of my reach. Long tubes are an option. Or the Cliffords show above, which are almost a mid-length header. Dutra Duals are cool, and probably my top choice. But stainless shorties that could clear a factory starter would by my top choice. Day dreaming perhaps, but there it is.
Author:  hyper_pak [ Mon May 13, 2024 6:20 pm ]
Post subject:  Re: Hyper Pak Exhaust Reproduction
Quote:
Quote:
...I would be curious to the number of Dutra manifolds sold by Doug and AussieSpeed.
I have one of the rear Dutra's in my garage...
Nice that you have one of the "Pre-Aussie" Dutra manifolds... nostalgia.
AussieSpeed has done a great job picking-up that project and keeping it "alive & well".
Much better then Clifford... who let my Hyper-Pak reproduced intake manifold project "die".

Anyway...
I built the Dutra Dual casting equipment in 1989, as a college class project! (30+ years ago)
Made close to 1000 units before the casting equipment went "down-under".
I do not know how many Aussie has made but it still looks pretty popular. I just installed a set from AS on an engine I built for someone.
DD

Image
To me it a real shame the Hyper Pak exhaust project has died.
AussieSpeed just posted this picture on Facebook.
Who knows how many manifolds have been produced.
Doug made close to 1000.

Attachments:
Dutra Duals Aussiespeed s.JPG
Dutra Duals Aussiespeed s.JPG [ 99.89 KiB | Viewed 362 times ]
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