exhaust temp help

Chris Hill · 04-05-2011, 05:50 PM

Some other things for EGT from a pure theory standpoint.

Compression goes up, EGT goes down
If starting rich, leaning the A/F ratio will increase EGT, it will peak at stochiometric, then decrease as it gets leaner still
Advancing spark timing increases EGT till ????? (sorry, having a brain fart and can't remember)
EGR (including internal EGR) will decrease EGT
Detonation causes EGT to decrease? (I think this is correct)
Volumetric efficiency causes EGT to ???? (can't remember this also)

EGT trends with peak cylinder temperatures and thus NOx emmisions.

marvstrick · 04-05-2011, 08:04 PM

engine builder said to get ried off msd timing retard . i am running 40 degrees . when looking at timing with alterator on above 4000 rpm timing keeps going.

04-05-2011, 05:50 PM	#1
Chris Hill Senior Member Join Date: Jan 2002 Posts: 655 Likes: 8 Liked 244 Times in 26 Posts	Re: exhaust temp help Some other things for EGT from a pure theory standpoint. Compression goes up, EGT goes down If starting rich, leaning the A/F ratio will increase EGT, it will peak at stochiometric, then decrease as it gets leaner still Advancing spark timing increases EGT till ????? (sorry, having a brain fart and can't remember) EGR (including internal EGR) will decrease EGT Detonation causes EGT to decrease? (I think this is correct) Volumetric efficiency causes EGT to ???? (can't remember this also) EGT trends with peak cylinder temperatures and thus NOx emmisions. __________________ Chris Hill https://ihmusedparts.com

04-05-2011, 08:04 PM	#2
marvstrick Member Join Date: Jan 2008 Posts: 153 Likes: 163 Liked 33 Times in 10 Posts	Re: exhaust temp help engine builder said to get ried off msd timing retard . i am running 40 degrees . when looking at timing with alterator on above 4000 rpm timing keeps going.