Wanting to run more rich for a bigger cam, what it the best way in tunerpro rt for 16197427 $0D to adjust air/fuel ratio? I know adjusting ve tabels but aint that corrected with the o2 sensor?
Wanting to run more rich for a bigger cam, what it the best way in tunerpro rt for 16197427 $0D to adjust air/fuel ratio? I know adjusting ve tabels but aint that corrected with the o2 sensor?
You running mostly stock? Any issues to make you want to run richer? Need more info. There are quite a few spots to tweak for that.... you could want a richer idle, richer startup, richer closed loop, richer open loop, richer PE/WOT, richer/longer AE if it's going lean on acceleration.... Need to know what's your goal or problem.
It is going to be in the O2 sensor parameters. You are wanting to target a different switchpoint for the O2 sensor. These are vs airflow for off idle and just target voltages for idle. You have a Lean, Mean and Rich for for idle and off idle. See attached screenshot.
Brian
Injector flow is an option, well maybe? For example, lowering the injector flow from 61 lb hr to 59 lb hr makes the computer "think" it needs to ADD / INCREASE the "Injector ON Time" so more fuel is sent out of the injectors.
Screen shots below are from 16197427 $OD VE Tuning using a plug-n-play AEM 30-4110. Measuring AFR is a GOOD THING!
dave w
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'?No im running a larger cam so i want to run it more rich where it should be for the cam
"it does run good" should be your main goal.
really big cams (you know, the ones that barely make any power below 5000 rpm) like quite a bit more fuel outside of their operating range to compensate for crazy airflow patterns, you need the extra fuel to keep it from momentarily lean and stumbling all the time, but on these engines closed loop barely works anyway, emissions are out the window no matter what you do, and who cares because racecar
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