Hi guys i just got 470cc Bosch injctors installed on my 1.8T . I calculated theoretical KRKTE 0.06961 for this injectors but my STFT still goes to up to -25% at idel. I dont konw dead time offset and could not find any data about so i let my TVUB stock.

KRKTE= 0.06961

         V 8             10              12            14          15.9
TVUB = 2.1040   1.3110   0.9105   0.6622   0.4913

Can someone pls hlp me out how to calibrate this injctors. I will attach a log if needs. 

TNX for the input gremlin
It`s a Audi A4 B6 1.8tQ longitudinal engene with 3bar FPR (converted from rutrnless to non-returneless fuel system). Everything was fine untill i have fitted 470cc injctors. befor was 310cc.
I got em cheep fom a guy, so i thout its a maybe worth efford to fitt em up coz the old one was running at max IDC

I set FKKVS all to 1
NOLRA to 27(HEX) for disabling LTFT adaptation,but it`s seems not helping at all its still -25% STFT at idle. Any idea how to make it eaven bit better?



 

I have already tried to put 4bar FPR with 310cc a while ago before I bought 470cc and was also not much better. Not sure if it's was bad FPR or fuel pump but wasn't working properly with 4bar FPR.

So after that I decided to do a littlel upgrade
70mm downpipe
FMIC
470cc
Turbo form my Golf GTI mk5 with minor mods to fit in A4 1.8 t
and new fuel pump. It's gave me a little more power instead of old K03.

The only difference I can feel with 470cc that this car runs much better through RPM < 4500 at WOT, only idle and and part throttle behave jearcking coz of lot STFT adaptation. I really don't know how to get that in control.  

How about TEMIN? I didn't touch this map, and IIRC it's 0.8989.
Should I try to lower it?

  Yes I did, that's has been followed through my mind too as I have started to face this nightmare during calibration

I'm familiar that this injectors coming form Opel. So I thought it's probably gonna work with some adjustments by tweaking and tricking some maps, but on fortunately I was completely wrong about. But anyway I'm gonna try some more adjustment at weekend again, will see if I can do it to get STFT at least to -10%. Will keep this thread update if I will make any progress.

Thank you for clearfaction gremlin that's good to know. At least now I know that's it's not a tune related by myself(perhaps it is form anther perspective of view), I'm not a tuner and been far form it, and I'm just trying to do some stuff for my self during reading and re-reading very useful content on this great forum and S4 Wiki.

I don't have file from Opel, but what about KRKTE in that file, are the offset factors are same for KRKTE and TVUB between this different ECUs. 


Want Q-dyn stands for? What does it mean? Sorry man I ask you perhaps a lot of questions, but I really like to understand it better.

Yes i set FRLFSDP to 1 for non-returnless fuel system after conversion.

Thanks mate to make this stuff more clear for me. I really appreciate it your efforts, times and patience explaining such stuff for me.