EGT for mixture setting?

[Edward Hernandez R]

----- Begin Included Message -----

>From owner-diy_efi-outgoing at coulomb.eng.ohio-state.edu Sun Mar 10 18:32 EST 1996
X-Sender: jsturs at bart.nl
>
Could somebody please explain the relationship between EGT and mixture
in a practical sense for tuning purposes, i.e. how would you actually
go about setting fuel curves based on EGT readings?
>

A very conservative method would be to tune A/F for the same EGT at 
WOT across the rpm range. A more aggressive approach would be to tune 
A/F for a shallow but constant rising slope vs rpm. There are lots of 
ideas as to a maximum EGT which you shouldn't exceed. Some like to
use about 1800 F on dyno, but that's pretty short term. I love it when
the exhaust glows red!

Ed Hernandez
Ford Motor Company
ehernan3 at ed8719.pto.ford.com