[Gmecm] Ideal gas law

[Rob Handley]

I have no reason to think the lookup isn't working. The values in the
standard Sunbird F31M array are fixed for MAT = 23.5 C and above. Is it the
same for the Sy/Ty ?

Rob

----- Original Message ----- 
From: "Dig" <turbodig at yahoo.com>
To: <gmecm at diy-efi.org>
Sent: 17 September 2007 14:37
Subject: Re: [Gmecm] Natural gas law


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