Hi

First post after being a lurker for a little while so here goes... bit of background first...

I have a 2001 Audi S3 that I have done a big turbo conversion on... the spec is essentially as follows..

1.8 20v (AMK), std bore/stroke, AEB head and Supertech valve gear std cams, GT3071r, 0.63 hotside, Tial wastgate, Siemens Deka IV 630cc injectors, 3bar FPR, std S3 MAF housing and sensor, FMIC etc...

My ECU is an ME7.5 (wideband and EGT probe)... I have been working on a base file to get the injectors dialled in and have so far found a few bits of conflicting info regarding the calibration data for these injectors... has taking a me a few attempts to get KRKTE close but think I am pretty much there now but have a few questions...

I have read S4 wiki inside out and having wide band makes it a bit easier to get WOT sorted on the road using block 001 in VCDS and checking Lambda Control... I have set up both LAMFA and KLFBTS with suitable fuelling and have set TVUB according to a spec sheet I found here:
http://siemensdeka.com/specsheets/FI114961cs.jpg

ms		volts
1.441		8
0.921		10
0.758		11
0.636		12
0.518		13
0.409		14
0.312		15

...although this conflicts with the data on the link here...
http://injector-rehab.com/shop/lag.html

ms		volts
0.83		10
0.64		11
0.5		12
0.38		13
0.28		14
0.17		15

Wasn't sure what to believe but went with the former rather than the latter... I used the 34.125/630 method initially but WOT was pulling a lot of fuel so after a lot of trawling and reading (mainly on Nef) I used another spec sheet from the siemens deka site (http://siemensdeka.com/specsheets/FI114961.jpg) which suggests that in fact the injectors are 668cc @ 3bar and the following useful post on Nef
This got me to a KRKTE of 0.04933 and a WOT run looking like:


Now... maybe a little tweak and I can get that a tad better but here are the questions...

Given that my LTFTs are hovering around mid 3%, is it better to tune FKVVS (mine isn't set to 1's like some of the other files on here) and/or TVUB? Due to the conflicting info on the 630's do I believe my TVUB settings to be correct? I have spoken to a friend who tunes for a living and I have no reason to disbelieve him at all (I know he is a member on here) but I thought it would be nice to get other people views on an approach to this

I have access to a dyno where I can do steady state across load sites but not sure if I am chasing the impossible of if I will get some progress from it...

Any advice is welcome

<tuffty/>

Thanks bud... there is a lot to learn isn't there...  been reading a lot over the past few weeks... I do have a small head start as a friend of mine has a tuning business and a dyno and he has let me work over there on my own car so you pick stuff up as you go... the map I had originally was from the original conversion I did and I have changed a lot of the hardware since so decided to have a go myself from scratch...

Good luck with yours

<tuffty/>

I use 1.1975 - 0.7361 -0.4881 - 0.3334 - 0.2480 and i have 1.2% measurements on block 032.
Siemens deka 630 with 3fpr.

I start from a base set of values and after some logs those looks to be the closest i can get to 0.
Its good to share so if you find them useful please inform.

im at 2.6% adjustment at a KRKTE of .05150 and TVUB stock, 1.5735 .9521 .6214 .4134 .2720. I will try some adjustments and report back later.

Just as information, these injectors are crap in general.
They are non-linear at low pulsewidths and over time their spray pattern further deteriorates at low loads causing lots of misfires at idle...

The boschdealer specs are wrong as well IIRC.

I've worked with 630cc injectors and they are as nonlinear as you can get. They require some serious fine tuning of the batter voltage compensation and I've found the injection correction map to be quite useful in helping with the non linear behavior as well. KFFKVS is the abbreviation for injection correction map. I won't go back to those injectors again though. I have yet to see a magic BVC that has worked well for more than one application.

750cc long body EV14's.