[Diy_efi] Peak EGTs occur at the stoichiometric ideal AFR of14.65-70:1

[gary]

Phil,
>
> Any search of the millions of available articles from the SAE (soc. 
> Automotive Engineers) will show that peak EGT for petrol occurs at 
> Lambda 1.1 or 16.17 it is also the A/F ratio of peak efficiency. The 
> bad news is that the NOX output at this A/F ratio is also the highest.
>
Of those millions, could you possibly forward a link that substantiates 
such claim, along with test results to validate the accuracy of this link?
Open minded to allow the weighing of results of any tests conducted.
>
> Not logical or intuitive but physics doesn't seem to mind.
>
I'd prefer facts gathered from testing, in lieu of engineering theory.
Again, any test results you could link me to, would be appreciated.
>
> Heat is a function of rate of burn as well as A/F ratio.
>
OK.  Burn propagation is fastest at the AFR that generates the most 
power, i.e. 12.5 AFR.  It becomes progressively slower the further from 
that point (on either side).  So Phil, what's your point?  Please explain, 
preferably with along with results of controlled test to validate.  Thanks.

GAS


----- Original Message ----- 
From: "Phil Lamovie" <phil at injec.com>
To: <diy_efi at diy-efi.org>
Sent: Thursday, March 31, 2005 7:50 PM
Subject: [Diy_efi] Peak EGTs occur at stoich ideal AFR of 14.65-70:1
> 
> "Peak EGTs occur at the stoichiometric ideal AFR of 14.65-70:1"  
> is simply wrong. 
> 
> Any search of the millions of available articles from the SAE (soc. 
> Automotive Engineers) will show that peak EGT for petrol occurs at 
> Lambda 1.1 or 16.17 it is also the A/F ratio of peak efficiency. The 
> bad news is that the NOX output at this A/F ratio is also the highest.
> 
> "how can you possibly generate more combustion heat with less fuel?  
> Not logical."
> 
> Not logical or intuitive but physics doesn't seem to mind. Heat is a 
> function of rate of burn as well as A/F ratio.
> 
> Hope this helps,
> Phil