The rear O2 is not a factor in fuel trims so I don't believe that is the problem.

Regarding the trim time question, 750s were removed and replaced with the OEMs by the car owner. I was trying to help him scale the injectors via email but, it got over his head so he brought the car back to me and now its idling very lean with the feedback at +25 and the STFT Low at .1008 (not registering). I noticed that as I let the car idle it started to improve but, not significantly. The one thing I don't know is if he disconnected the battery. I disconnected it last night and will try again tonight so I would assume given we know the OEM scaling/injectors everything should be cool (after I scale the MAF too).

 

does anyone know what the latency base adjustment does?? i made a post about it and didnt get anything. thanks

 

Hey man, if you don't wanna fix it or even just try suggestions, then sure, do what you believe in.

 

Latency change for FIC 750 that I have observed recently. The numbers that I had given out in the past seem to be way lean (like +15% on STFT) in more than one car.

New numbers- Scaling still at 650

3.312
1.680
1.032
.864
.648
.552
.360

 

When feed back maxed out at +- 25 trims will not show meaning scaling is way off or something is definitely wrong somewhere.

 

I did try it and it didn't make a difference.

 

John,

Much appreciated man, much appreciated. These numbers were SPOT on. Trims were all within -1 to +2!!!!

 

Alright gents....reporting back with my Scaling and Latency Values for the badboys below... FIC 1250cc Injectors.

I want to thank Bryan for giving me some awesome ballpark values

91 Oct: 1271
(LTFT Low: -1 / LTFT Mid: -4)

E85: 886
(LTFT Low: -4 / LTFT Mid: 0)

4.008
3.096
2.208
1.512
1.056
0.816
0.648

 

Anyone have anymore numbers on these or advice, I really am not 100 percent sure how to get the voltage of my injectors. Would love advice more knowledge, don't understand 1271 as the value?? I have never head of anyone doing a Value larger than the injectors?? If I am wrong though please let me know, love to learn and don't know it all. thanks for the info on FIC 1250, I will be getting mine in soon. John have any advice??

 

yes the BlueMax's scale a bit higher than their 'published' flow rate.

 

Alright, so are his voltage number close to on the ball? I mean how do I get those numbers for my setup of injectors? ill keep watching for more advice Thanks

 

Were planning on running the blue max 1250's with a FP Red car (dual map 93 and e85). How do they idle on pump gas? How high should our expectations be?

 

FIC 950cc anyone? I couldn't find any info on these (other than the AEM sheet). Thanks

 

I'm using a scaling of 812 and the following latency, trims are within about 5-6%.

V ms
4.69 3.312
7.03 2.184
9.38 1.392
11.72 0.912
14.06 0.792
16.41 0.408
18.68 0.264

 

Thanks for posting these, they are a great starting point Trims are within -5 to -8, only need to do some minor tweaking