Quote Originally Posted by steveo View Post
an o2 sensor is only reliable when targeting a range near stoich (14.7:1 with normal gas).

playing with o2 switch points might get you a 1% change or something which probably wont be noticeble, any further and closed loop will become unstable

if you want to run richer than stoich during normal conditions you'll want to run open loop by preventing closed loop from being entered somehow (effectively disabling the o2 sensor) so your fueling changes are obeyed

a good way to go would be to tune in closed loop so your VE table is correct, then disable closed loop and you can add a percentage of fuel. right now if you just throw fuel at it, it will be all over the place since your existing ve table is probably way off.

if you want to run richer during acceleration but maintain closed loop during cruise, you're looking for the power enrichment tables



in my experience most cams are pretty happy with closed loop and 14.7:1 or so, just where do you think it 'should be'?
Ahh i understand. I just heard bigger cams like more fuel but havnt tried it, i been tuning my ve tables for 14.7:1 so running more rich was something i havnt actually tried other then for a idle. I may stay with 14.7:1 then as it does run good.