12-23-2014, 04:51 AM
Join Date: Sep 2009
Location: Yamato Japan
Total Cats: 25
Individual Cylinder Trim, AFR vs EGT
Because this is the best technical forum around I want to ask this here:
I'm ***** deep in a semi-money is no object (within reason) build and have a subject I'd like to breach: At what point are there just too many damn sensors?
The skinny: what's the best/most efficient/most realistic way to take advantage of individual cylinder trim? The way I see it you have 3 options:
1) EGT every cylinder pre-turbo, One general AFR post turbo
2) Both AFR and EGT all cylinders
3) AFR every cylinder, FUQ DAT EGT
To me, option 1 seems the most sensible, as if you have your AFR's where you want them across the map, you can use EGT to fine tune each cylinder and have a 99.99999% solution. Whiel obviously option 2 is the most robust, I feel that the benefits really don't outweigh the cost and complexity.
What say you oh experts? BTW, if it matters, the engine in question is an I-6, and I honestly think that 6 EGT probes and 6 o2 gauges would REALLy start to get stupid in terms of cost/clean routing, etc.