OK i have a few questiona concerning afr and gas milage.
currently my car gets aroudn 12mpg in city and 18 on hwy. this is very conservative driving not getting into boost. My AF at idle is set to 13.5ish(seems a bit rich to me for idle). Doing 60 in 5th gear steady cruise i get closer to around 14.9 and at 80 in 5th i start seeing closer to 15.9 -16.5.
Keeping in mind I have a low comp 9:5 engine with bbsc at 8psi and AEM with AEM UEGO 02, 550 inj, and no aftercooler, i have the following questions
1) is 16ish AF getting to lean for low throttle cruising.
2) is 13.5 for idle just wasting a lot of gas?
3) when driving at a steady pace with cruise control set I will get rather wide ranges of AF readings on my gauge jumping from low 14s to all of a sudden as high as 17. I have been in some other peoples cars and thier AF guages do not show these wide fluctations. Is this common? You can view a video of what I am talking about here:
http://www.rune-interactive.com/nsx/80mph.html
4) is the difference in fuel consumption between say 13.5 and 14.7 significant?
5) what kind of gas milage are other people with a similar setup seeing? I believe Devin told me a while back that he averages around 29mpg on the hwy. Could have him confused with someone else though.
6) what is considered dangerously lean?
currently my car gets aroudn 12mpg in city and 18 on hwy. this is very conservative driving not getting into boost. My AF at idle is set to 13.5ish(seems a bit rich to me for idle). Doing 60 in 5th gear steady cruise i get closer to around 14.9 and at 80 in 5th i start seeing closer to 15.9 -16.5.
Keeping in mind I have a low comp 9:5 engine with bbsc at 8psi and AEM with AEM UEGO 02, 550 inj, and no aftercooler, i have the following questions
1) is 16ish AF getting to lean for low throttle cruising.
2) is 13.5 for idle just wasting a lot of gas?
3) when driving at a steady pace with cruise control set I will get rather wide ranges of AF readings on my gauge jumping from low 14s to all of a sudden as high as 17. I have been in some other peoples cars and thier AF guages do not show these wide fluctations. Is this common? You can view a video of what I am talking about here:
http://www.rune-interactive.com/nsx/80mph.html
4) is the difference in fuel consumption between say 13.5 and 14.7 significant?
5) what kind of gas milage are other people with a similar setup seeing? I believe Devin told me a while back that he averages around 29mpg on the hwy. Could have him confused with someone else though.
6) what is considered dangerously lean?