pressure=hp quattrorunner@lvcm.com

[Michael Gough]

> An example would be two pipes, the first 1" and the second 2" in diameter.
> Now, flow water through each, both at 15psi of pressure.  Both have 15psi,
> correct, so in your above example, both the 1" and 2" pipes would be flowing
> the same amount of water, but intuitively you know that is wrong.  The same
> is with a modified engine, or especially with a motor running a bigger turbo.

Hmmm, but isn't the "pipe" the same size no matter what turbo you are
running? The pipe (the head and intake manifold) doesn't change size when
you put a new turbo on. Just like your water pressure in pipe, if you have a
1" pipe flowing water at 15psi, if you change the water pump (turbo) the
pipe is still 1" and the pressure is still 15psi, so it will still flow the
same. If you change the engine "pipe" to 2" (port the head, use a 20v head
etc.) you WILL make more power with the same boost, because more air is
flowing through the head at that pressure. Now of course I know that a
larger more efficient turbo will make more power, but isn't this more a
factor of the lower intake temps? The K26 @ 20psi is heating the air an
enormous amount. If you had 15psi in the manifold, and going through the
head at 115°F with a K26, vs. 15psi at 115°F going through the same head
with another turbo (Garrett, KKK, Holset, whatever) I would bet that you
would make the same power.
Just a thought...probably will be shot down, but oh well :)
Mike