Kas, I will overlook your modesty in this regard, knowing some of your past,
to ask whether you can really even notice a difference while driving a
mildly prepared 1500 spit with a 4/2/1 versus 4/1 header?
thanks,
jim
Sent: Wednesday, February 23, 2000 1:35 AM
Subject: Re: Spit Header;
> Just from an old guy that might have had something to do with TR's in the
> past, when you have a little enigne there is no torque so go for the
> obvious.
> ----- Original Message -----
> From: James Libecco <jfl@neoucom.edu>
> To: Bob Lang <LANG@isis.mit.edu>; Patrick McMullen <pmcmull@ibm.net>
> Cc: DAN DURYEE <DLDEAD@worldnet.att.net>; <fot@autox.team.net>
> Sent: Tuesday, February 22, 2000 5:16 PM
> Subject: Re: Spit Header;
>
>
> > Hi, I thought I would take a second to welcome myself to the list. I am
> Jim
> > Libecco, living in Ohio with a slowly improving autox 76 spit 1500. I
am
> a
> > medical student at NEOUCOM that tries his hardest to maintain contact
with
> > the outside world.
> >
> > The question. Maybe I am missing something in the math (that's why I am
> in
> > medicine and not engineering), but where does this formula take into
> > consideration the diameter of the pipes? A Kirk header is considerably
> > different in size than a Stahl header. Also, how do you tune a header
> with
> > this formula for torque vs. horsepower, or is there a corollary formula
> that
> > would accompany this?
> >
> > Thanks,
> > jim libecco
> > jfl@neoucom.edu
> >
> >
> > ----- Original Message -----
> > From: "Bob Lang" <LANG@isis.mit.edu>
> > To: "Patrick McMullen" <pmcmull@ibm.net>
> > Cc: "DAN DURYEE" <DLDEAD@worldnet.att.net>; <fot@autox.team.net>
> > Sent: Tuesday, February 22, 2000 3:00 PM
> > Subject: Re: Spit Header;
> >
> >
> > > On Sat, 19 Feb 2000, Patrick McMullen wrote:
> > >
> > > > Dan,
> > >
> > > Folk...
> > >
> > > > I may be way off base here but this is a formula for just such a
> > > > dimension:
> > > >
> > > > P=(AxSxD²)divided by(1400xd²)
> > > >
> > > > Where as:
> > > >
> > > > P= pipe length
> > > > A= degrees duration
> > > > S= stroke in inches
> > > > D= diameter of piston in inches
> > > > d= diameter of exhaust valve in inches
> > > >
> > > > This was given to me a number of years back by JK Jackson. I'm
> > > > sorry I do not remember what the constant (1400) represented. The
> > > > whole formula may be TR6 specific...but I don't think so.
> > > > Somewhere I have a book with more math formulas then you can shake
> > > > a stick at, all automotive related.
> > > > Has anyone else seen this formula?
> > >
> > > Yes, I have. It used to be on the Temple of Triumph web site a year or
> > > two ago...
> > >
> > > > Or did I just give away a
> > > > "Super Secret" proprietory information tid bit (sorry JK!) only
> > > > known to Irish rocket scientist!!! (Is there such a thing?)
> > >
> > > I believe 1400 is a constant for the speed of sound in feet per
second,
> > > but I could be wrong.
> > >
> > > > Patrick McMullen in NC (Yes I have a brother named Mike)
> > >
> > > Bob in Cambridge... Massachusetts. No, not that liberal arts school up
> > > the creek!
> > >
> > > > I swear...NO whiskey was involved!
> > >
> > > Ummm - okay Pat. Whatever you say.
> > >
> > > later
> >
>
> --------------------------------------------------------------------------
> > -----
> > > Bob Lang Room N42-140Q | This space for rent.
> > > Consultant MIT Computer Services |
> > > Voice: (617)253-7438 FAX: (617)258-9535 |
> >
>
> --------------------------------------------------------------------------
> > -----
> > >
> >
> >
>
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