AEM wideband reading... LEAN?

[stevesrt4]

Got my AEM wideband in today and to me, from a guy who is coming from the srt platform i am lean. I called enjuku who at the time had scott on the other line. I told them that i am running 9.5lbs and my a/f ratio threw the powerband is 13.5 ta 13.7 witch to me is lean, like the car should'nt be running right lean. in the neon that kinda a/f ratio would couse a break up in the power band. scott told enjuku which told me that, that was a normal reading for a stock sr ecu at 9.5lbs and i was safe. but to me that just seems lean. i think for my own self i will try to swap out this 94ser o2 sensor with the 300z turbo one and see if it makes a diffrence. that or i'll just stick the stock one in the hole and see how it runs... if that does'nt work i'll turn the boost down a couple lbs if the computer pulls fuel and makes the same a/f then i know for a fact that, that is what there soupose to run at... car pulls very hard for what it is, and does'nt buck or skip a beat. if i did not have the wideband to tell me what the a/f is i would not even be worried. I'd be beating the hell out of it.... Please post your thoughts. Am I ok to beat the piss out of her? or do I have a issue.....

Also the motor came with a adjustable wga and i can see from the wirring the ecu had a piggyback on it of some sort. could the guy have swapped out the wheel inside the turbo (yea right I'm not that lucky) or done something that would require more fuel than the stock set up + walbro pump? ...thanks, steve.

[stevesrt4]

bump, anyone?

[stevesrt4]

no one's got a thought on this?

[C - ROD]

did u check ur fuel pressure

[virus77]

does it run lean till redline or only in the middle rpm range. the stock sr tune is pretty lean on the low-mid side of the revs for fuel ecomomy/emissions. I personally retuned my car, I was less than satisfied with what nissan had for a tune.

[stevesrt4]

does it run lean till redline or only in the middle rpm range. the stock sr tune is pretty lean on the low-mid side of the revs for fuel ecomomy/emissions. I personally retuned my car, I was less than satisfied with what nissan had for a tune.

its about the same the whole way. I start at about 3500 and its in the 13's the whole power band... scary in my eyes. your not the first person to tell me nissan runs them lean.

[stevesrt4]

did u check ur fuel pressure

No I haven't I'll have to get a gage and check it. what should it be at if you don't mind me asking... thanks for the help guys.

[dknysae]

i just dyoned my 180sx blacktop. And my afr started at 13 at low boost then went to 12 at high boost. So i was running a little lean. 10-11 afr is where you want to be around. To correct this i was told to get a fuel pressure reg and to check if my fuel pump was changed to a walbro 255. With these i should be around 10-11's.

[stevesrt4]

that is my plan as well, i just ordered a fpr today. I wander why our cars are lean? i mean i'm only running like 9-10 lbs of boost too. got the walbro in there as well.

[ngcharleshk]

When cruising on the highway, I run 14.4 to 15.3 reading. IN boost, I get 10.5 to 11.4 reading. In low boost, I get around 12 to 13. I m running stock boost on my SR20det redtop except i added a spring on the wastegate to increase the pressure, so now i get a boost of around 8 pounds.

[ngcharleshk]

When cruising on the highway, I run 14.4 to 15.3 reading. IN boost, I get 10.5 to 11.4 reading. In low boost, I get around 12 to 13. I m running stock boost on my SR20det redtop except i added a spring on the wastegate to increase the tension, so now i get a boost of around 8 pounds.

[sr20detmaybe]

im runnin about 12 psi and i had to add fuel in the middle rpm range bc it was lean and i had to take away alot up wop bc it was so rich.

[Dreamert]

Well, I used the search function to find out exactly that.

We just got around to install the AEM UEgo on my brother's JDM S13 and at WOT it goes around 13.2-13.3 till redline. At idle and cruise, it goes off the AEM cahrt (above 17).

We talked to a fellow SR20DET owner and he said that his does the same.

My brother's car is also running around 10psi of boost....and I'm also from the SRT world which knocked me off when I saw those readings :!

Did you get an update on this situation ?

[C - ROD]

IMO: 13;1 isnt that bad, i mean u said ur only running 10 lbs on stock injectors, that sounds like its about normal for ur setup, id say get a adj. FPR & something to tune with, as long as u are not predetoning! if its not pinging, u should be good! & stock fuel pressure is like 43.5 PSI, bumo it to like 50 - 55 psi & see if that helps!!
Modified by C - ROD at 6:51 PM 6/27/2007