proper a/f readings

turbo970 · Post by **turbo970** » Wed Jan 07, 2015 3:12 am

just wonder whats considered a good a/f reading when under boost.

SILINC3R · Post by **SILINC3R** » Wed Jan 07, 2015 4:06 am

if under full boost you need to be under 11. At idle or crusing should be 14.7 and off throttle will be lean or off scale as the ECU cuts fuel. You should be able to slowly creep into boost and watch it drop.

turbo970 · Post by **turbo970** » Wed Jan 07, 2015 4:14 am

cool. and thanks i'm set at 14 psi and when i get on it to pass some one it drops to 10:1 to 11: 3

robertpaige · Post by **robertpaige** » Wed Jan 07, 2015 6:54 am

Yeah 11 or under is best. I run like 10.2 under WOT lol.. 14.7-15.2 at idle.

James614 · Post by **James614** » Wed Jan 07, 2015 11:24 am

10s sounds pretty darn rich. Guess that's why my MPG was only 14 if I drove like a teenager after my tune, lol.

robertpaige · Post by **robertpaige** » Wed Jan 07, 2015 12:21 pm

Yeah 10s is rich as hell.. but safe!

turbo970 · Post by **turbo970** » Wed Jan 07, 2015 7:39 pm

well i get in the 10's when its cold cold. but later in the day it gets low 12's high 11's

turbo970 · Post by **turbo970** » Fri Jan 09, 2015 1:52 am

so this may sound dumb. lol so anytime i'm in boost i should read richer whether its 5 lbs of boost or 14 lbs and should be 14.6 to 15.0 idle and cruise?. this is my first wideband and still learning

robertpaige · Post by **robertpaige** » Fri Jan 09, 2015 12:22 pm

Yeah 12's is bad... You need to be 11.4 or lower in boost for it to be safe. As soon as you start to get into boost you should see the numbers start to get lower. At WOT you should be seeing 10's, 14.6-15.2 is usually where my idle reads.

turbo970 · Post by **turbo970** » Fri Jan 09, 2015 2:18 pm

thanks robert. just want to make sure i was reading it right. because soon as i ease into boost the numbers drop fast. then once i hammer it it drops to the 11's and even 10's depending how cold it is. i'm getting cj's old fcd to so i can get rid of my get me by fcd lol

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proper a/f readings

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