Well I have been helping a buddy who had his car tuned by someone who didnt bother scaling the injectors. The car runs pretty good at WOT with AFRs in the low 11's (it needs to be leaned out some however the old trims where adding so much fuel every pull was inconsistent) however overall driveability sucks.
Well after getting decent scaling and latency values the fuel map needed adjustment.
The problem is that to get it down to an acceptable AFR I am seeing cell values of 12.5+ above 220ish load all the way through to redline.
Is this acceptable? What would do this? I am only asking because of the few guys I have helped out I have never seen fuel cell values above 11 in these corresponding cells.
The injectors are PTE 880s, and they are scaled to 443 I believe for E85. Trims are -3.
Has anybody come across scaling for these injectors for E85 also?

 

I'm gonna take a noob crack at this and say that the values in the fuel tables are just that..values. As long as your AFRs are good, they can read 9's or 12's.

But I believe they are reading 12's because you scaled the 880's in the wrong direction. I was think they were in the mid-low 600s area in the scaling. I'll have to find the stick thread.

*Disregard..saw that you are on E85. I don't know anything about that.

 

ya^ thats what I figured..
Originally my buddy thought he bought PTE 1000's after an hour of thinking I was losing my mind I thought to use some 880 numbers and BAM STFT was +-2.

 

Hey Brandon, the numbers are just multipliers that the ecu uses to determine a final fuel map. Like the guy above stated, as long as the AFR is where you want it, the numbers don't have to be similar.

 

I thought there may be an underlying fueling issue or just an issue in general considering how much of a pain scaling these injector s where. I would input a small adjustment and the trims would swing by a large amount.

 

Some injectors are a pain in the *** to scale. Denso 720's come to mind.

 

What about the larger injectors? I've heard above 1200's are tough for things like starting and low throttle drivability.

 

I have FIC 2150cc injectors, and they were a BREEZE to scale and tune latency. Larger low impedance injectors(1200-1850cc) are a bit of pain to scale and tune latency on with gasoline. E85 makes it a little easier getting them set up correctly.

 

My FIC 1100's were pretty easy to scale once I got going. My fuel map numbers richest was 10.2, its now 11.2 in the map and I'm still needing to lean further. It sure looks a strange map when you see values that high in it, makes you wonder if everything is alright.