Keeping with the other threads in this new section.. here is the rundown on my mods at a quick glance.

Current mods:
Stock 2.7T w/ TiAL 605 turbo kit
Self-made 85mm MAF using OE Hitachi sensor
1000cc ID Injectors
Stock 4 BAR FPR
Bosch Motorsport "044" Fuel pump w/ check valve
Ebay dual in/out FMIC w/ custom 2.5" piping
VAST W/M still using dual #3 nozzles (K03 setup)
SSAC 3" > 2.5" catless DP, mated to single 3" Milltek turbo back (two mufflers)



Future Mods:
HPX sensor in 85mm housing
3 BAR FPR
ER SMIC w/ carbon shrouds
Dual 3" Catless DP to either single 3.5" or True dual 3" turbo back
Larger W/M nozzles + AEM failsafe or new Aquamist HFS-3 kit

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I figure I'll keep my info relevent to my car/605's in here only... that way I can share info with you guys and get help/feedback without cluttering up the site.

Anyway, last night I got the MAF on and the injectors in.

Basic Fueling Specs...
Inj: ID1000
MAF: 85mm
File: Tony's Stage 3 M-Box for now

I started with some KRKTE & TVUB #'s from Juliex yesterday, and while the TVUB numbers are probably ok, the car was idling very, very lean with a KRKTE of .05, so with no wideband installed yet (yeah I know....) I decided to up the KRKTE until I felt the motor was responsive enough (seemed to be around 0.06 already), I then noticed that the ECU was still adding fuel so I bumped it to 0.07.

Now the car seemed to be somewhat happy, idle was still hunting and VAC on my boost gauge was less then normal (16-18) but I'm unsure if this is due to the slight hunting and possibly increased TQ req. @ idle in Tony's file.  But the motor was responding nicely to the accelerator so I could tell the fueling was at least ok.

Anyway, I ended up extending the decimal point for the KRKTE value to 3, and settled on a value of I think .075 for now... A little on the right side, but with no changes at all to Tony's file other then TVUB and KRKTE it was time to go home (1am).  But before that I took it for a few test drives to make sure I would get home in one piece and of course for at least one 2nd gear log












Either way, today's task is to get the idle and part throttle right with a closer to realistic KRKTE value.  As it seems around .5 is more or less correct just at idle it's far too lean.  But with higher valves idle is fine, but cruise and boost is WAYYYYY too rich.

Interesting...

Can I just plug these in as is then?

Did that and it helped... but I'm still having a hard time with lean idle AFR's and what seems to be oscillating light/cruise AFR...  And if course I can't seem to always get the boost AFR where I want to to be... so I gave up for the night.

Made good power on the dyno (don't really want too much more right now, still on the stock FP)...



Need to get my wideband in and post up the shit ton of logs that I have from the dyno pulls... and then start tinkering.  I still ended up with a KRKTE of .066 to help with the leaner idle/cruise situation.

TVUB values for ID 1000 injectors based off info from the injector dynamic website.
voltage/   time msec
7.04/   4.362
10.0672/ 2.030
12.03/   1.656
14.08/   1.324
17.8816/ 0.821

Part of the reason why I went with 3bar besides issues with fitting solid FP into a C5 platform (shorter fuel tank), was the fact that at idle an injector with so much flow will have serious issue opening/closing accurately and will lead to all sorts of issues.

If you look at ID site and locate the graphs for injection error you will notice that they have rather large linearity error at low pulse widths. The problem is that with 1000cc @ 4bar you are well into that area since our cars idle at around 1.4-1.5 with 4 bar and slightly more (but just enough to get our of trouble area especially that the curve moves the the left 3 bar) at 3bar.

I think you might have to do the same thing I did which is go with 3bar albeit I have ev14 1000cc which no doubt have different characteristics altogether.


Here are the graphs:

3bar:


4bar:


As to osciallation at idle/cruise. With 1000ccs it is almost unavoidable, but it all depends how many 0.1s are we talking about. 0.1-0.2 below/over oscillation I would call normal, undershooting/overshooting by 0.5 while idling is no good and probably related to the linearity error.

Yea. Use KRKTE to get open loop right (use a wideband!), then use KFKHFM to massage idle/cruise to get your trims zeroed.

I hope that the MAF you made is not the culprit here. What does it mate to on filter side?

Just thinking about geometry here. It seems to me that the sensor opening is pretty far from exact center of maf housing, am I right?

The further it is from the center, the less air speed it will register at the same air flow as in the exact center. You might have to compensate for that in your MAF table or by KRKTE.

Having no filter is not only bad from the IATs perspective but also because the air has no time/travel distance to mix properly and get rid of vorticles the sharp edges of of maf housing generate.

So many variables... but follow post in the other thread above/below where I posted about TVUB. I think the FPR/TVUB combination is the issue at hand.