For the Monday morning crew, please post logs of injector duty cycle and list mods.....

PSmalls::DoggieStyle · 07-24-2005, 07:58 PM

As some of you know, I recently upgraded injectors and MAF housing for homebrew stage 3. Before this, I was running a stage 3- setup on stock injectors and MAF. With stage 3- running slightly over 1bar at redline, my injector duty cycle was in the 130-140% range:

I recently logged injector fuel on time again to compare injector duty cycles before/after upgrading injectors and I'm still over 100% (~110%) near redline:

I only increased boost 3 psi, but stock injectors at 5 bar fuel pressure supposedly flow less than 400cc/min whereas the Bluetops I have in there now should flow almost 490cc/min at 5 bar fuel pressure.

sj6sp · 07-24-2005, 08:03 PM

Are you O2 voltages looking good?

PSmalls::DoggieStyle · 07-24-2005, 08:05 PM

It makes no sense to me, totally stumped. I'm hoping people of all different mod stages, even stock, will post so I can see the progression of duty cycle. This could turn into a really informative thread, but people need to gather info. If anyone local to me has some time so I can log their car's fuel injector on time for this, I'd be very grateful.

***O.W. Kenobi*** · 07-24-2005, 08:32 PM

PSmalls::DoggieStyle · 07-24-2005, 08:33 PM

I don't actually expect many responses this late, but I wanted this to be posted before I wake up.

VerrÜckt · 07-24-2005, 11:41 PM

and X chip software is designed to run really rich.

Quit diddling around with narrowband sensors and tune with a wideband.

I'll try to get you some logs sometime. My primary fuel is -12.1% and I know I'm still pretty rich.

Flyboy · 07-25-2005, 05:44 AM

k04/rs6north · 07-25-2005, 06:27 AM

DAP@EPL · 07-25-2005, 06:33 AM

Seriously, I'd recommend some wideband datalogging. Its probably not ideal to max out the injectors, but as long as they are providing sufficient fuel to prevent you from running lean (where the wideband comes in... I still have a hard time relying on the narrowband sensors), then you should be ok.

Who knows... maybe your car is running really rich at the top end. And I'd suggest posting injector duty graphs instead of injector on-time... makes it much easier to read (and its not that hard to calculate).

-Dave Pramanik

VerrÜckt · 07-25-2005, 07:03 AM

07-24-2005, 07:58 PM	#1
PSmalls::DoggieStyle Elder Member Garage is empty, add now Join Date: Jan 2004 Posts: 30,257	For the Monday morning crew, please post logs of injector duty cycle and list mods..... As some of you know, I recently upgraded injectors and MAF housing for homebrew stage 3. Before this, I was running a stage 3- setup on stock injectors and MAF. With stage 3- running slightly over 1bar at redline, my injector duty cycle was in the 130-140% range: I recently logged injector fuel on time again to compare injector duty cycles before/after upgrading injectors and I'm still over 100% (~110%) near redline: I only increased boost 3 psi, but stock injectors at 5 bar fuel pressure supposedly flow less than 400cc/min whereas the Bluetops I have in there now should flow almost 490cc/min at 5 bar fuel pressure.

07-24-2005, 08:03 PM	#2
sj6sp Member Garage is empty, add now Join Date: Feb 2002 Posts: 2,908	I don't have any logs on my PC but should get some this week...question though Are you O2 voltages looking good? __________________ <A HREF="http://www.marsavius.net/qclub" target="_blank"> </a>

07-24-2005, 08:05 PM	#3
PSmalls::DoggieStyle Elder Member Garage is empty, add now Join Date: Jan 2004 Posts: 30,257	That's the thing, 02 voltages are awesome. I am actually a bit rich on the top end now. It makes no sense to me, totally stumped. I'm hoping people of all different mod stages, even stock, will post so I can see the progression of duty cycle. This could turn into a really informative thread, but people need to gather info. If anyone local to me has some time so I can log their car's fuel injector on time for this, I'd be very grateful.

07-24-2005, 08:32 PM	#4
*O.W. Kenobi* Rest In Peace Garage is empty, add now Join Date: May 2001 Posts: 19,412	Are you on Zurich time or something? It's not Monday yet! __________________ ======================================== My track videos * Brake FAQ * Kenobi lock pump * Kenobi hazard relay * Lidatek install * 43k oil analysis * 51k oil analysis * 60k oil analysis * 68k oil analysis * 76k oil analysis

07-24-2005, 08:33 PM	#5
PSmalls::DoggieStyle Elder Member Garage is empty, add now Join Date: Jan 2004 Posts: 30,257	I am posting this late tonight in order to get Monday morning people to respond. I don't actually expect many responses this late, but I wanted this to be posted before I wake up.

07-24-2005, 11:41 PM	#6
VerrÜckt AudiWorld Super User Garage is empty, add now Join Date: Feb 2003 Posts: 16,414	Of course you're rich. You've hardly pulled back any fuel... and X chip software is designed to run really rich. Quit diddling around with narrowband sensors and tune with a wideband. I'll try to get you some logs sometime. My primary fuel is -12.1% and I know I'm still pretty rich.

07-25-2005, 05:44 AM	#7
Flyboy AudiWorld Super User Garage is empty, add now Join Date: Apr 2000 Posts: 3,686	APR Stage3 Graph __________________ www.MyAudiS4.com/vast-sucks (Updated: 20 Jan 2012) Stock -> APR Stg1/2 -> GIAC Stg2 -> APR K04 Stg3 -> EPL TiAL 605 -> V̶A̶S̶T̶ EPL/Frankenturbo F4H

07-25-2005, 06:27 AM	#8
k04/rs6north Junior Member Garage is empty, add now Join Date: Dec 2002 Posts: 1,716	ygm with data __________________ 2001.5 Nogaro S4 2002 Black Allroad 6spd RIP Matthew Ammon aka O.W. Kenobi

07-25-2005, 06:33 AM	#9
DAP@EPL Audiworld Sponsor Garage is empty, add now Join Date: Jun 2000 Posts: 19,700	Greentops. :P Seriously, I'd recommend some wideband datalogging. Its probably not ideal to max out the injectors, but as long as they are providing sufficient fuel to prevent you from running lean (where the wideband comes in... I still have a hard time relying on the narrowband sensors), then you should be ok. Who knows... maybe your car is running really rich at the top end. And I'd suggest posting injector duty graphs instead of injector on-time... makes it much easier to read (and its not that hard to calculate). -Dave Pramanik __________________

07-25-2005, 07:03 AM	#10
VerrÜckt AudiWorld Super User Garage is empty, add now Join Date: Feb 2003 Posts: 16,414	2nd.

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