Take a look at my log.... Options

[black92_tsi_awd]

Mods are listed in the garage. Fuel pressure read 41psi with the vacume disconnected, 34psi connected. Pump has been rewired.

Log is here from Pocketlogger
http://www.elmnet.net/~lange_c/run2_4_15_05.xls
Scroll up to get all the data.

It's running lean, the Injectors are running near over 100% and the o2's are around .8. How ugly does it look to you guys?

About how much FP should I add? I'm going to try a stock auto trans FPR or a 2g (I can't remember what you said you had Darryl...).

Anybody try one of those B&M Commandflo regulators?

[natedogg]

Lets clear a few things up here.

A. Running higher base fuel pressure on stock injectors is NOT necessarily a bad idea. They can handle higher pressure. Get too high and the spray pattern changes and thats bad, but raising the fuel pressure a little bit above stock will basically just make your 450's act more like 500's or similar.

B. The injector dc as read by the graph portion of the pocketlogger program is based off of a true reading so you CAN trust it. Its a simple calculation based on the ECU's read engine speed and pulse width output to the injectors. J is correct that the narrowband O2's are NOT trustworthy to tune by.

C. J is correct that upgrading the fuel pump is the next step. If you are planning on sticking with the stock turbo a rewired 190 should do the job for you. If you ever plan on going with something larger go ahead and get the 255 and plan to upgrade to an afpr in the future. It may run a little rich at idle and cruising until you get the afpr, but its better than running too lean at WOT.

By looking at your log, I'd say its your midrange during spoolup that is running lean. If you look at every time you start knocking right after a shift and correlate the knock to the Inj. PW or DC you see that it is rather low compared to the very next sample by a good 3 ms. All PW samples after that stay within a ms of each other as you knock decreases. Ie. all your knock is coming from that short moment after a shift when you get back in it and the turbo spools up. It seems the ECU can't keep up with the turbo right at this point. A larger/rewired fuel pump may help alleviate this.