And to boot there is no adiabatic (constant temperature)
compression in the real world. Gasses heat up with pressure and
heat increases gas pressure with all other variables constant -
that's how some diesel engines ignite their fuel/air mixture. It's
all in Boyle's Gas Laws.
8 to 1 CR is a theoretical 115 psi. Compression gauge test would
usually be higher. Power producing hi rpm/open throttle (dynamic)
psi = ?
Mike L
60A,67E,59Bug,74TR6
----- Original Message -----
From: Ryan Miles <rjhmile@yahoo.com>
To: <jswarth1@tampabay.rr.com>
Cc: <6pack@autox.team.net>
Sent: December 5, 2002 5:01 AM
Subject: Re:TR6 performance (current list)
> Jim,
>
> Ok, I'm going to take a stab at #8. I think the answer to
your question is really yes and no. The static compression ratio
is a mathematical calculation which takes into account different
factors such as bore stroke, head chamber, gasket thickness etc.
The Dynamic compression is actually the cylinder pressure observed
during engine operation. Because gasses and fuel have momentum
just like anything else, the intake valve will stay open during
the compression stroke, and at higher RPM should actually draw in
more air while even while the piston is moving upwards on its
compression stroke
.................................................
|