Dr. My browser will not go to your site by clicking, but the formula I have
been ignoring is tire circumference X gear ratio X displacement over
volumetric efficiency. So I know how far my car moves in one rotation of the
tire. This requires 2.5 revolutions of the crankshaft. Since my 400 cubic
inch motor breathes in every other time that's 500 cubic inches of air at
100% efficiency. For ease of expression I'll call that 100 inches forward in
2 1/2 turns of the motor. So at that rate I have a column of air 100 inches
long and I need an opening of 5 square inches (2.5X2 inches).
As I mentioned I decided this didn't look right although it sounded right.
Speed is not a factor in this very simple equation and I'm sure something is
missing. Rich
----- Original Message -----
From: "DrMayf" <drmayf@teknett.com>
To: <land-speed@autox.team.net>
Sent: Monday, January 28, 2002 06:09 PM
Subject: Scoop Size (see size does count!) Chuckles...
> I fiddled around with making a friendly formula for finding scoop size
based
> on engine parameters (disp, vol efficiency, rpm) and target speed to
reach.
> I put this puppy on my web site. Be interested in comments, threats,
> blaspheme, or whaatever...
>
> http://www.teknett.com/pwp/analyses.htm
>
> It should be the top item on that page, click and off you go....
>
> for those of you who may be browser challenged, the formula is:
>
> Scoop Size (sq in) = 0.00047338 * (Displacement(cucic inches) * Vol
> Efficiency * RPM ) / Speed (mph)
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