Stock vs. 10% added to primary on Stock ECU to solve the High EGT problem. *EDITED*

EdyJun · 08-24-2005, 06:00 PM

ALL PARTS IN CAPS LOCK ARE ADDED PARTS (EDITED)

As some of you may know I was getting high EGT when doing a few WOT.

It was recommended to add 10% to Primary and log it again. Well here it is.

Click me to see…

(Side note)
IMO - With 10% primary car is very much happier I would recommend adding to the primary for those who are running 91 octane gas and those who are in traffic a lot (TRY THIS ONLY IF YOU HAVE A COMPLETE UNDERSTANDING OF HOW IT WORKS - DO NOT TRY THIS IF YOU ARE NOT SURE). I have noticed that in ~70 deg weather the car runs a lot smoother and cooler. The oil never passed 200 deg and the coolant would toggle between center and the 2 left mark on it's left during the 2 days that I was testing it.

In 90 deg weather with the A/C ON. The car also runs nicer and cooler.

The added primary acts a bit like having better IC the IAT is cooler quicker and the car's temp is generally kept lower.* (better FATS)

I personally add some % to the primary for day to day driving. (TRY THIS ONLY IF YOU HAVE A COMPLETE UNDERSTANDING OF HOW IT WORKS - THIS WAS ONLY DONE ON MY CAR) (there is no noticeable extra gas usage to my knowledge.)

It appears that a Stock S4 would need to have some tweaks for it to run safe (IMO). Remember I was getting High EGT after doing 3-4 WOT or when I was driving on the freeway and pushing the car. W/ 10% added it lower the EGT greatly.

It should also be said that outside air temperature and IAT play a major role in high EGT, on a Stock ECU more than running on the lean side (IMO).

Next - Log w/ out MAF and try 8% primary + 5% secondary.

Pressure test was done and NO Boost leek that I could detect was found.

Any Comments?

Edy

*EDIT*
I HAVE DONE THIS ONLY ON MY CAR. PLESE MAKE SURE THAT YOU HAVE A COMPLETE UNDERSTAND OF WHAT YOU ARE ABOUT TO DO.

*
I HAVE GOTEN THIS RESULT ON MY CAR AND ONLY MY CAR.

EdyJun · 08-24-2005, 06:28 PM

Mike2kS4 · 08-24-2005, 06:46 PM

You can spend an unreasonable amount of time tweaking it up and down to find your fastest combo, but it looks good.

EdyJun · 08-24-2005, 06:49 PM

PSmalls::DoggieStyle · 08-24-2005, 06:52 PM

Stock is programmed that lean for a reason.

Mike2kS4 · 08-24-2005, 06:54 PM

Mike2kS4 · 08-24-2005, 06:55 PM

EdyJun · 08-24-2005, 06:56 PM

EdyJun · 08-24-2005, 06:57 PM

PSmalls::DoggieStyle · 08-24-2005, 06:59 PM

08-24-2005, 06:00 PM	#1
EdyJun Member Account #: 48484 Join Date: Dec 2002 Posts: 2,849	Stock vs. 10% added to primary on Stock ECU to solve the High EGT problem. EDITED ALL PARTS IN CAPS LOCK ARE ADDED PARTS (EDITED) As some of you may know I was getting high EGT when doing a few WOT. It was recommended to add 10% to Primary and log it again. Well here it is. Click me to see… (Side note) IMO - With 10% primary car is very much happier I would recommend adding to the primary for those who are running 91 octane gas and those who are in traffic a lot (TRY THIS ONLY IF YOU HAVE A COMPLETE UNDERSTANDING OF HOW IT WORKS - DO NOT TRY THIS IF YOU ARE NOT SURE). I have noticed that in ~70 deg weather the car runs a lot smoother and cooler. The oil never passed 200 deg and the coolant would toggle between center and the 2 left mark on it's left during the 2 days that I was testing it. In 90 deg weather with the A/C ON. The car also runs nicer and cooler. The added primary acts a bit like having better IC the IAT is cooler quicker and the car's temp is generally kept lower.* (better FATS) I personally add some % to the primary for day to day driving. (TRY THIS ONLY IF YOU HAVE A COMPLETE UNDERSTANDING OF HOW IT WORKS - THIS WAS ONLY DONE ON MY CAR) (there is no noticeable extra gas usage to my knowledge.) It appears that a Stock S4 would need to have some tweaks for it to run safe (IMO). Remember I was getting High EGT after doing 3-4 WOT or when I was driving on the freeway and pushing the car. W/ 10% added it lower the EGT greatly. It should also be said that outside air temperature and IAT play a major role in high EGT, on a Stock ECU more than running on the lean side (IMO). Next - Log w/ out MAF and try 8% primary + 5% secondary. Pressure test was done and NO Boost leek that I could detect was found. Any Comments? Edy EDIT I HAVE DONE THIS ONLY ON MY CAR. PLESE MAKE SURE THAT YOU HAVE A COMPLETE UNDERSTAND OF WHAT YOU ARE ABOUT TO DO. * I HAVE GOTEN THIS RESULT ON MY CAR AND ONLY MY CAR. __________________ 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>

08-24-2005, 06:28 PM	#2
EdyJun Member Account #: 48484 Join Date: Dec 2002 Posts: 2,849	Wow, 33 views and no comments.... __________________ 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>

08-24-2005, 06:46 PM	#3
Mike2kS4 Elder Member Account #: 38083 Join Date: Jun 2002 Posts: 12,105	Looks good x33. You can spend an unreasonable amount of time tweaking it up and down to find your fastest combo, but it looks good. __________________ 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.

08-24-2005, 06:49 PM	#4
EdyJun Member Account #: 48484 Join Date: Dec 2002 Posts: 2,849	Should I be shooting for 0.88-0.89v for O2 on Stock ECU and 91 or will that be a waste? __________________ 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>

08-24-2005, 06:52 PM	#5
PSmalls::DoggieStyle Elder Member Account #: 69223 Join Date: Jan 2004 Posts: 30,285	Try only +5% and see how it compares. I don't see why you should be that rich at such low boost. Stock is programmed that lean for a reason.

08-24-2005, 06:54 PM	#6
Mike2kS4 Elder Member Account #: 38083 Join Date: Jun 2002 Posts: 12,105	Hell no. That's fuel o plenty Adjust it down in 2% increments and see if you get any faster. __________________ 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.

08-24-2005, 06:55 PM	#7
Mike2kS4 Elder Member Account #: 38083 Join Date: Jun 2002 Posts: 12,105	And that reason being: to spool the turbos quicker :p __________________ 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.

08-24-2005, 06:56 PM	#8
EdyJun Member Account #: 48484 Join Date: Dec 2002 Posts: 2,849	Stock is programmed that lean for a reason. - What is the reason sir? __________________ 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>

08-24-2005, 06:57 PM	#9
EdyJun Member Account #: 48484 Join Date: Dec 2002 Posts: 2,849	Maybe i should be asking what O2 v should i shoot for? __________________ 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>

08-24-2005, 06:59 PM	#10
PSmalls::DoggieStyle Elder Member Account #: 69223 Join Date: Jan 2004 Posts: 30,285	And better gas mileage.

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