[Gmecm] Natural gas law

Dig turbodig
Mon Sep 17 13:37:16 UTC 2007


Are you talking about the values in the table, or are you saying the lookup isn't working?

The factory calibration was, "less than perfect".

The other thing at work here, is the fact that when temps heated up, they wanted a bit extra fuel to keep the detonation demons away.  24 c is a bit low to start doing that, IMO.

Later,

Dig


----- Original Message ----
From: Rob Handley <Robin at FuryWorld.fsnet.co.uk>
To: gmecm at diy-efi.org
Sent: Saturday, September 15, 2007 10:15:46 AM
Subject: [Gmecm] Natural gas law

I've been trying to match the $58 BPW calculation with a hand made BPW 
calculation spreadsheet - which is based on the natural gas law.

What's confusing me ATM is that, in $58, the inverse air temperature 
correction factor (array F31M) does not change when the MAT value is >23.5 
C.

Since gas mass is inversely proportional to gas temperature (if pressure and 
volume are constant), the MAT contribution should have an effect at all 
temperatures, and this effect IS significant above 23.5 C.

What am I missing?

Rob 

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