This list continues to amaze me at the wealth of knowledge here. Some
people would have read that article about rod length and taken it as
gospel. Dave's reply was very informative and eye opening to a very
technical aspect of the internal combustion engine. Hey Dave if you
ever need a gopher, I know a good one that is very willing and able to
learn. Just disregard what that Turck fellow says about me his head is
still swelled.
BillB
----- Original Message -----
From: "dahlgren" <dahlgren@uconect.net>
To: "Bill Bennett" <benettw@earthlink.net>
Cc: <land-speed@autox.team.net>
Sent: Wednesday, August 02, 2000 7:37 AM
Subject: Re: Timing and rod length
> interesting site but unfortunately anyone that #1 thinks in terms or
> 'vacuum' in the cylinder does not really get it yet!!!! The mention
of
> good ports heads with no reference to the square inches in the
runner,
> not the cc's by the way another # that is prone to a whole variety
of
> errors and limits all research done to a specific cylinder head as
> opposed to universally applied data. The mathematics that describe
all
> of the events that relate to rod length go far beyond the wishful
> thinking that is going on at this web site....... There is no
sucking
> going on in the intake manifold or cylinder period. You have a delta
P
> across the port. The speed of the piston at any given point in the
> stoke along with the rod length, the area of the port, the area of
the
> valve, the valve lift, the taper/length of the intake port, the
volume
> of the plenum(if not IR), the area of the exhaust headers, the
length of
> the header, the area of the collector, the length of the collector,
the
> point of intake closing on the cam, the compression ratio, and a few
> other factors will determine the cylinder filling. The mathematics
are
> not for the calculator impaired by any means. The most glaring
problem
> i see with the explanation given at this page is the omission of the
> port area which has the strongest relationship to rod ratio.
> My humble opinion anyway of what i read......Hope to see you all in
> impound just got an H engine off the dyno for a little lakester..
only
> made 240hp @ 10300 and nosed over to 225hp @ 11300 but enough i
think at
> the rear wheels for a H/GL....
> Dahlgren
>
> Bill Bennett wrote:
> >
> > I know Brad brought this question to the list earlier, but I have
> > found some info at this site lot of info on effects of rod length.
> > http://www.stahlheaders.com/Lit_Rod%20Length.htm
> >
> > yeah I was looking for header parts for the F motor.
> >
> > Bill Bennett
> > "Southern Salt Terror"
> > http://home.earthlink.net/~benettw/
>
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