ambient temps and O2

[buzzman]

guys, took my car out for the first time, temps in the 40's, noticed some real low o2 readings at wot....like in the 720 range....usually 770 or so....no kr due to a good infusion of race gas.....boost hits 20 then settles at 16....could the cold ambient temp. affect 02's to that degree, or should i start looking for a problem? thanks

 

[NJ Torque]

Could have to add fuel for cold weather... I know I do.

I would find out your boost creep issue too, should'nt see over what you have it set at...

 

[buzzman]

thanks for the quick response......i have a non adjustable wastegate but had eric burn as much boost into the chip as possible (i know that is limited)....it usually hits 18 for a second in second gear and then settles at 16.....i had never seen 20 before and attributed it to the ambient temp.....i know that i am very close to being out of injector (still stock) because of improvement in air intake, ie. 8 in. KN, dutt neck cooler, and good exhaust. I do have a newer reds pump with hot wire. I stopped and added as much gas to erics chip as possible to no avail. Can't add any fuel pressure at this time due to having a 237 reg. Could be time to go to a bigger injector. I also thought my pump could be on its wa out but it is an XP with only couple of thousand miles on it. What do you think?