There are various schools of thought regarding perfectly matched
lengths. Some say a slightly different pattern of lengths helps one
cylinder scavenge the exhaust gasses from adjacent pipes. That's why I
won't be offering any complete headers (only Flanges).
Regards,
Joe
P.S. Just like cams, there are different formulas for different
applications.
Ron Krantz wrote:
>
> The problem with headers that fit easily probably are not equal length. And
> that is the most important elementof a good header. Stahl headers are nice
> but the 4 to 1 that I was getting for my 1147cc varied in length by over an
> inch. I now make my own, including the flanges to match the ports after I
> have ported the head. The 4-1 is the best for all out performance, but
> 4-2-1 is still better than the stock manifold and much easier to fit. Most
> racers end up modifying the frame and bellhousing to get the 4-1 to fit.
> There are several books that cover this subject and give the equations for
> calculating the correct length.
> Joe - I might take you up on the flanges - I cut mine out on the Mill.
> Ron
> ReK Racing
> ----- Original Message -----
> From: Joe Curry <spitlist@gte.net>
> To: James Libecco <jfl@neoucom.edu>
> Cc: <cavej@mcmaster.ca>; spit <spitfires@autox.team.net>
> Sent: Tuesday, March 07, 2000 7:43 PM
> Subject: Re: HEADERS
>
> >
> > I was aware of that! However, I am not aware of "How they fit" I am
> > sure I can either meet of beat their prices and the flanges would be cut
> > with a laser cutter and surely would be very exact in their mating to
> > the ports. Therefore, I could be assured of a good fit.
> >
> > Joe
> >
> > James Libecco wrote:
> > >
> > > Joe, I don't want to burst your bubble, as I appreciate all the amazing
> > > projects you have created, but someone has beat you to this one.
> > > http://www.stahlheaders.com/Frame%20Flanges.htm
> > >
> > > By the stahl headers I have seen before, I am sure it is quality stuff,
> but
> > > you may be able to do it cheaper in mild steel. I still am an opponent
> to
> > > stainless, its just bad stuff for headers.
> > >
> > > The question then becomes how does one go about calculating the
> appropriate
> > > tubing diameters, distances between collectors and what not for the
> 4/2/1?
> > > Kastner said to make them as long as possible, but was referring to the
> 4/1,
> > > I think. I am not sure any of the header companies have really put much
> > > work into designing a proper header. I they had, my 4/2/1 would be
> commonly
> > > available, right??
> > >
> > > Thanks Joe,
> > > jim
> > > ----- Original Message -----
> > > From: "Joe Curry" <spitlist@gte.net>
> > > To: "James Libecco" <jfl@neoucom.edu>
> > > Cc: <cavej@mcmaster.ca>; "spit" <spitfires@autox.team.net>
> > > Sent: Tuesday, March 07, 2000 7:14 PM
> > > Subject: Re: HEADERS
> > >
> > > > James and all,
> > > > THis thread has dredged up a project that I have on the back shelf. A
> > > > while back I was considering making header flanges for the SPitfire
> > > > 1300/1500 engines in both mild steel and Stainless for those who don't
> > > > want to buy Pacesetter or put out the bucks for the 4-2-1 ones that
> are
> > > > available.
> > > >
> > > > I suspect I can deliver the Stainless ones for under 50 bucks and the
> > > > mild steel for even less. With those pieces, you can go to a tubing
> > > > shop that has a bender and manufacture whatever you want!
> > > >
> > > > How does that sound?
> > > >
> > > > Joe
> > > >
> > > > James Libecco wrote:
> > > > >
> > > > > John, Welcome to my nightmare. I have been trying to come up with a
> set
> > > of
> > > > > the 4/2/1 headers for about four months now. I am not ready to
> break
> > > down
> > > > > and pay the price that rimmer/tssc want (ie close to $300) when the
> 4.1
> > > are
> > > > > so readily available and cheap. I just had a conversation with Kas
> > > about
> > > > > the headers and he suggested that the difference would be noticed.
> > > > >
> > > > > So, the question becomes, what would it take for me to make my
> own
> > > > > headers since no one else seems to want to do it for me.
> > > > >
> > > > > BTW, has anyone else besides me seen a set of Stahl headers for
> the
> > > > > spit. Now that is a header.
> > > > >
> > > > > jim
> > > > >
> > > > > >Date: Tue, 07 Mar 2000 12:08:57 -0500
> > > > > From: John Cave <cavej@mcmaster.ca>
> > > > > Subject: HEADERS
> > > > >
> > > > > >I want to put headers on my 78 , 1500 engine British Parts
> Northwest
> > > > > have them for $106, but they are not 4-2-1, they are 4 into 1, does
> > > > > anybody have any experience or opinion on them.
> > > > > Thanks John Cave
> > > >
> > > > --
> > > > "If you can't excel with talent, triumph with effort."
> > > > -- Dave Weinbaum in National Enquirer
> >
> > --
> > "If you can't excel with talent, triumph with effort."
> > -- Dave Weinbaum in National Enquirer
--
"If you can't excel with talent, triumph with effort."
-- Dave Weinbaum in National Enquirer
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