well ever since it started getting colder, i have been getting leaner and leaner. i started off with 18 psi during the summer and maxing out at 11.8 afrs were the leanest it went. as it got colder those afrs went as lean as 13.0, so i turned the boost down. im now at about 14-15 psi and i am getting a afr of 11.8 at the leanest point. the afr goes from an initial 10.0 when i floor it around 3k and just gets leaner and leaner as the rpms increase. my boost goes from 14 psi to about 10 psi by redline, before in the summer, i was getting about 18psi dropping to about 14psi by redline. performance mods are full exhaust including the o2 housing, intake, forge bov, fm wga. i boost leak tested and i am getting a small leak from my hotside pipe. i am thinking that maybe my fpr is clogged, the reason i think this is b/c my car had a hard time at first starts in the summer, and the car has almost 50k with a stock fuel system. im running about stock boost, and still going somewhat lean as compared to a bone stock car. anyone have any ideas?
colder air = denser air. there are more oxygen molecules going into the turbo. thats why you are lean. it has nothing, NOTHING, to do with your fuel system.
and do what you want. its your car. more fuel and more boost does not always equal more power.
i realize that too, but i need some fuel to work with when i get a tune. i plan to have 2 tunes (summer and winter) with the same amount of boost on both tunes.
my main concern is if my current afrs are normal for not going below 40-50 deg. as compared to summer where it was 70-80
i realize that too, but i need some fuel to work with when i get a tune. i plan to have 2 tunes (summer and winter) with the same amount of boost on both tunes.
my main concern is if my current afrs are normal for not going below 40-50 deg. as compared to summer where it was 70-80
if you tune with dsp or sct, you wont need that. you only really need to have different maps like that if you use a piggyback...which IMO are completely assinine any more, since dsp is so damn cheap.
if you tune with dsp or sct, you wont need that. you only really need to have different maps like that if you use a piggyback...which IMO are completely assinine any more, since dsp is so damn cheap.
well i plan to use a dsp, on a externally gated ptp intimidator manifold with a 15 psi spring in a tial wastegate. all this will be on the car within 2 weeks. will dsp still be fine on the same tune on an external gate year round?
well i plan to use a dsp, on a externally gated ptp intimidator manifold with a 15 psi spring in a tial wastegate. all this will be on the car within 2 weeks. will dsp still be fine on the same tune on an external gate year round?
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something not right with my afr's
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