Logs from a dyno pull, insight and comments appreciated...

Distinct · 08-31-2005, 07:38 AM

This is from a 2001.5 S4 using APR V5.0 91 octane, has an exhaust and parts should all be in running order (plugs, coolant, etc.) except for a potentially faulty or intermittent fan (not sure about this, getting it looked at today).

The car had high oil and water temperatures (ones I don't normally see even with aggressive driving on the road).

It's in 4th gear and 100% throttle plate angle.

DAP@EPL · 08-31-2005, 07:42 AM

Its odd, from what I've seen of EGT spikes, the ECU ususally just dumps extra fuel but doesn't cut boost.

-Dave Pramanik

DAP@EPL · 08-31-2005, 07:54 AM

WindyCityS4 · 08-31-2005, 07:54 AM

Distinct · 08-31-2005, 08:04 AM

rktskicar · 08-31-2005, 08:04 AM

Distinct · 08-31-2005, 08:05 AM

Fixn2xlr8 · 08-31-2005, 08:07 AM

DAP@EPL · 08-31-2005, 08:08 AM

Mark P · 08-31-2005, 08:12 AM

Also a lot of timing retard for such little knock up high, but I guess that's due to the heat???

EGT spike surely looks due to the lean A/F. Are you *sure* you were in 91oct mode? That flat 0.85 lambda is what I recall in the Stg3 race programs. I didn't log back when I was running K03s, so I have no specific experience there.

08-31-2005, 07:38 AM	#1
Distinct Member Account #: 54738 Join Date: Apr 2003 Posts: 3,512	Logs from a dyno pull, insight and comments appreciated... This is from a 2001.5 S4 using APR V5.0 91 octane, has an exhaust and parts should all be in running order (plugs, coolant, etc.) except for a potentially faulty or intermittent fan (not sure about this, getting it looked at today). The car had high oil and water temperatures (ones I don't normally see even with aggressive driving on the road). It's in 4th gear and 100% throttle plate angle. __________________

08-31-2005, 07:42 AM	#2
DAP@EPL Audiworld Sponsor Account #: 6924 Join Date: Jun 2000 Posts: 19,701	Looks like the car lowered boost or went to limp mode due to the EGT spike? Its odd, from what I've seen of EGT spikes, the ECU ususally just dumps extra fuel but doesn't cut boost. -Dave Pramanik __________________

08-31-2005, 07:54 AM	#3
DAP@EPL Audiworld Sponsor Account #: 6924 Join Date: Jun 2000 Posts: 19,701	And the high temps indicate insufficient cooling on the dyno. What kind of fans were used? __________________

08-31-2005, 07:54 AM	#4
WindyCityS4 AudiWorld Super User Account #: 52314 Join Date: Mar 2003 Posts: 7,544	MAF looks way low. __________________ In a world of constant change, it is the learners that shall inherit the future. For the learned soon find themselves capable of living in a world that no longer exists. Autobahn Country Club (North, South, combined), Blackhawk Farms, Gingerman, Grattan, Mid-Ohio, Putnam Park, Road America, Sears Point, Thunderhill and "The Ring"

08-31-2005, 08:04 AM	#5
Distinct Member Account #: 54738 Join Date: Apr 2003 Posts: 3,512	One note, this log is from the 9th pull and the car was very hot. __________________

08-31-2005, 08:04 AM	#6
rktskicar AudiWorld Super User Account #: 44443 Join Date: Oct 2002 Posts: 8,592	Where's the dyno plot that goes with these? __________________ Stock 010 6MT Blue Sprint B8 S4. Premium +, Sport diff, B&O BBS CH, 255/40/18 Bridgetstone RE960 AS 01.5 6MT ASP Stage 3 S4 (sold 9/25/09)

08-31-2005, 08:05 AM	#7
Distinct Member Account #: 54738 Join Date: Apr 2003 Posts: 3,512	I need to get that into digital. __________________

08-31-2005, 08:07 AM	#8
Fixn2xlr8 Junior Member Account #: 90271 Join Date: Apr 2005 Posts: 2,220	Id like to see it too. __________________ Audi Haiku: The Spinning Turbo - Rejoice! The Air Becomes Speed! - My Money Is Gone.

08-31-2005, 08:08 AM	#9
DAP@EPL Audiworld Sponsor Account #: 6924 Join Date: Jun 2000 Posts: 19,701	Do the logs look like that for only that pull or for all pulls? __________________

08-31-2005, 08:12 AM	#10
Mark P AudiWorld Expert Account #: 139 Join Date: Mar 2000 Posts: 27,942	IAT is really hot at 170 to start. A/F looks like a race program... Also a lot of timing retard for such little knock up high, but I guess that's due to the heat??? EGT spike surely looks due to the lean A/F. Are you sure you were in 91oct mode? That flat 0.85 lambda is what I recall in the Stg3 race programs. I didn't log back when I was running K03s, so I have no specific experience there. __________________ Mark P Current: '04 Porsche 911 Turbo, Speed Yellow - website - 26k miles '02 Audi S4 Avant, Imola Yellow, APR Stg3 - website - 191k miles '01.5 VW Golf 4dr 1.8T, Satin Silver, GT28R - website - 203k miles '09 VW Tiguan 2.0T, Candy White - Hers Previous: '00 Audi A4 1.8T, Silver - Quattrobonium website

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