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 |
> --------------------------------------------------------------------------
-----
>
|