Did some logging tonight with new injectors and FPR (long, bww)

PSmalls::DoggieStyle · 09-27-2005, 08:57 PM

As many of you know, I've been running homebrew stage 3 with bluetop injectors @ 5bar (~488cc/min) for quite a while. With this setup, I was having some minor misfire issues at idle. Because of this, I decided to buy another set of injectors to increase headroom (injector duty cycles have been high with the 36# bluetops) while also seeing if the injectors were the cause of the misfires.

I decided to go with 38# Delphi injectors (thanks again, Mike2KS4) @ 4.7 bar (thanks again for the kickass custom FPR crushed to my specification and the LATE LATE LATE night injector/FPR swap, Piggie), which would theoretically flow ~500cc/min. The combination of replacing FPR and injectors solved my misfire issues. Piggie believes the misfires were from my FPR and that the injectors are perfectly fine, but either way they are sitting on the shelf and I now have more headroom so I'm a *very* happy camper.

The injectors went in less than 24 hours ago. Since then, I've only put ~50 miles on the car. With that said, I think I've got the car tweaked quite well alerady. Here are my current Lemmiwinks settings:

Sorry the print-screen shot is so small. Here are the tweaks channel by channel....

Ch.1 -> +20
Ch.2 -> 90.6%
Ch.3 -> 75.0%
Ch.6 -> -1
Ch.9 -> +1.5
Ch.10-> -16.6%
Ch.14-> +2

FWIW, I only had 12.5% primary pulled with the bluetop injectors. The increased headroom is evident by the new primary fuel setting of -16.6%. I made the mistake of not logging fuel injector on time tonight, but I will get around to it soon in order to show how the duty cycles have dropped with the new fueling setup.

And now the graphs for you visual people:

MAF and Timing (~22.5 PSI peak tapering to ~20 PSI):

Correction Factors:

02 Voltages:

As always, comments and questions are welcome. Happy motoring!

Mike2kS4 · 09-27-2005, 09:00 PM

Good job man

PSmalls::DoggieStyle · 09-27-2005, 09:02 PM

Mike2kS4 · 09-27-2005, 09:03 PM

EdyJun · 09-27-2005, 09:03 PM

PSmalls::DoggieStyle · 09-27-2005, 09:16 PM

It's not that they don't flow enough for me, but I'd prefer more headroom (lower duty cycles) just for peace of mind.

PSmalls::DoggieStyle · 09-27-2005, 09:22 PM

Milpitas2.7T · 09-27-2005, 09:28 PM

Mike2kS4 · 09-27-2005, 09:29 PM

Funkweasel · 09-27-2005, 09:34 PM

;p His Mooreness disagrees with it though I think. heh.

PS Mike, did you get my email re:cams?

09-27-2005, 08:57 PM	#1
PSmalls::DoggieStyle Elder Member Garage is empty, add now Join Date: Jan 2004 Posts: 30,257	Did some logging tonight with new injectors and FPR (long, bww) As many of you know, I've been running homebrew stage 3 with bluetop injectors @ 5bar (~488cc/min) for quite a while. With this setup, I was having some minor misfire issues at idle. Because of this, I decided to buy another set of injectors to increase headroom (injector duty cycles have been high with the 36# bluetops) while also seeing if the injectors were the cause of the misfires. I decided to go with 38# Delphi injectors (thanks again, Mike2KS4) @ 4.7 bar (thanks again for the kickass custom FPR crushed to my specification and the LATE LATE LATE night injector/FPR swap, Piggie), which would theoretically flow ~500cc/min. The combination of replacing FPR and injectors solved my misfire issues. Piggie believes the misfires were from my FPR and that the injectors are perfectly fine, but either way they are sitting on the shelf and I now have more headroom so I'm a very happy camper. The injectors went in less than 24 hours ago. Since then, I've only put ~50 miles on the car. With that said, I think I've got the car tweaked quite well alerady. Here are my current Lemmiwinks settings: Sorry the print-screen shot is so small. Here are the tweaks channel by channel.... Ch.1 -> +20 Ch.2 -> 90.6% Ch.3 -> 75.0% Ch.6 -> -1 Ch.9 -> +1.5 Ch.10-> -16.6% Ch.14-> +2 FWIW, I only had 12.5% primary pulled with the bluetop injectors. The increased headroom is evident by the new primary fuel setting of -16.6%. I made the mistake of not logging fuel injector on time tonight, but I will get around to it soon in order to show how the duty cycles have dropped with the new fueling setup. And now the graphs for you visual people: MAF and Timing (~22.5 PSI peak tapering to ~20 PSI): Correction Factors: 02 Voltages: As always, comments and questions are welcome. Happy motoring!

09-27-2005, 09:00 PM	#2
Mike2kS4 AudiWorld Super User Garage is empty, add now Join Date: Jun 2002 Posts: 12,096	3.6, bah... wusspod! Good job man __________________ 2002 S4 Avant, 6spd. Bone stock. <a href="http://www.autospeed.us"> </a> Caveat: Any advice I express regarding potential tuning and such is purely informational. If your knowledge and abilities are not up to the task, no amount of advice can assist.

09-27-2005, 09:02 PM	#3
PSmalls::DoggieStyle Elder Member Garage is empty, add now Join Date: Jan 2004 Posts: 30,257	Not all of us are blessed with 'brids. ;-)

09-27-2005, 09:03 PM	#4
Mike2kS4 AudiWorld Super User Garage is empty, add now Join Date: Jun 2002 Posts: 12,096	Indeed. I couldn't do any better with K04. Great job! __________________ 2002 S4 Avant, 6spd. Bone stock. <a href="http://www.autospeed.us"> </a> Caveat: Any advice I express regarding potential tuning and such is purely informational. If your knowledge and abilities are not up to the task, no amount of advice can assist.

09-27-2005, 09:03 PM	#5
EdyJun AudiWorld Super User Garage is empty, add now Join Date: Dec 2002 Posts: 2,719	Nice ! __________________ 2000 Audi S4 STG 3 FATS = 3.66 w/ 91 oct AIM: EdyJun 11 September 2001 In their honor. In their memory. <font color="red">---------------------------------------------------------- <u><big> <a href="http://homepage.mac.com/edyjun1/S4/index.htm">EdyJun's S4 Directory (FAQ, DIY, Info, Tips and Help) </a> </big> </u>---------------------------------------------------------- </font>

09-27-2005, 09:16 PM	#6
PSmalls::DoggieStyle Elder Member Garage is empty, add now Join Date: Jan 2004 Posts: 30,257	There are many out there making similar or more power with bluetops@5bar (KOpork, Verruckt, etc).... It's not that they don't flow enough for me, but I'd prefer more headroom (lower duty cycles) just for peace of mind.

09-27-2005, 09:22 PM	#7
PSmalls::DoggieStyle Elder Member Garage is empty, add now Join Date: Jan 2004 Posts: 30,257	They all have pretty nice patterns. I watched Piggie test 6-8 different injectors, all nice.

09-27-2005, 09:28 PM	#8
Milpitas2.7T AudiWorld Expert Garage is empty, add now Join Date: Jun 2000 Posts: 25,948	why so much correction on cyl 3? 2 and 5 are usually the most bitchy __________________

09-27-2005, 09:29 PM	#9
Mike2kS4 AudiWorld Super User Garage is empty, add now Join Date: Jun 2002 Posts: 12,096	His car hates teh cyl3... I don't ask. __________________ 2002 S4 Avant, 6spd. Bone stock. <a href="http://www.autospeed.us"> </a> Caveat: Any advice I express regarding potential tuning and such is purely informational. If your knowledge and abilities are not up to the task, no amount of advice can assist.

09-27-2005, 09:34 PM	#10
Funkweasel AudiWorld Super User Garage is empty, add now Join Date: Nov 2001 Posts: 10,137	Finally someone sees my point about duty cycle headroom. ;p His Mooreness disagrees with it though I think. heh. PS Mike, did you get my email re:cams?

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