l5 colorado stoich afr question

[gosselin958]

hello
can i change the stoich afr for gas saver

example 14,69971 to 14.9

if not what can i do, 3.5l canyon drink like e v8

[CatnipG5Bandit]

You can but that isn't going to net a whole lot. A lot of it is in the rest of the tune. Trans, etc... But remember, this table has an effect on a LOT of other tables. If you set stoich to say, 15, then you will be very lean on full throttle. My recipe for fuel economy is:

Increased timing in cruise rpm/air cells.
Torque converter lockup to 90min and 100max(if automatic)
A bit increased trans pressures
Switched my stoich a little higher for road trips, and fattened the PE ratio so I retain my 12.5-12.8AFR at WOT
A light foot.

But mostly a light foot. I did get fantastic mileage in my 2.2 Cobalt on a road trip with those changes. 65mph was 50mpg, 75mph was 40mpg, and 90mph was still 35-37mpg.

[gosselin958]

the test is done
80miles more with tank with light foot
332miles with 67l of 91oct