Re: Compression Test

["Paul Bayly" <thebaylys@domain.elided>]

I thought someone would take me to task on this one.  Thats why I added
theoretical perfect"

You are entirely correct, I was just trying to simplify the process.   As we
are using the same pump (the engine)at sea level and at altitude, the
process would have the same imperfections in both cases.....remove "147PSI"
and insert "X PSI"

I still belive the ppressure would be less at altitude regardless of
absolute numbers.

Beatle
-------Original Message-------

From: Greg Hermann
Date: Friday, 15 November 2002 08:36:13 AM
To: Paul Bayly; alfa digest
Subject: Re: Compression Test

As far as I can see....14.7 psi @ sea level @ 15degC
>multiplied by 10 (10:1 compression) would give a theoretical 'perfect'
>pressure of 147 psi.

Absolutely incorrect. You need to allow for the fact that you are dealing
with an imperfectly adiabatic compression process, and also for the cam
timing.

Thermo 101.

Greg
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