Air/Fuel Ratio Understanding for Tuning

[AllTheGoodNamesAreGone]

Originally posted by viper04af:
umm from my reading

NA/cars make best power at a 12.5:1 , car are tuned for a 14:1 becuase it lowers polution and passes the states pol tests

factory O2 are only acurate at 14:1 ratio the more you vary from that the more they are off.

FI cars should am for a 11.5:1 ratio b/c of all the extra air in there your gonna need more fuel

yes and no.. jsut just to clarify.. a roughtly 12.5 (my car got 12.6 at wot) is what you shuld see for an tpyical NA car.. however that alll cahnges depending on the application..

14.1-14.5 are the typical "stoich" AF ratios.. you want to be somewhere in there when crusing around..

this was pretty much all stated above.. but.. as normal no one pays attention..

11.5 for a FI car is just a guide line.. some people will go from 11-12 and call the tune conservative.. but that all depends on the car..

[Turbo V6 Camaro]

Originally posted by AllTheGoodNamesAreGone:
</font><blockquote>quote:</font><hr />Originally posted by viper04af:
umm from my reading

NA/cars make best power at a 12.5:1 , car are tuned for a 14:1 becuase it lowers polution and passes the states pol tests

factory O2 are only acurate at 14:1 ratio the more you vary from that the more they are off.

FI cars should am for a 11.5:1 ratio b/c of all the extra air in there your gonna need more fuel

yes and no.. jsut just to clarify.. a roughtly 12.5 (my car got 12.6 at wot) is what you shuld see for an tpyical NA car.. however that alll cahnges depending on the application..

14.1-14.5 are the typical "stoich" AF ratios.. you want to be somewhere in there when crusing around..

this was pretty much all stated above.. but.. as normal no one pays attention..

11.5 for a FI car is just a guide line.. some people will go from 11-12 and call the tune conservative.. but that all depends on the car.. </font>[/QUOTE]yeah it does vry with every car to make max power, it like finding a comb to a 100 number pad lock with 6 correct numbers lol