My first mods

WolfPlayer · 05-18-2005, 03:37 AM

My first mods with ST:

1) I was always pulling about 4-5% A/F learning at idle RPMs. Basically this is around 1.20-1.35 on the MAF (voltage). I think this is from my modified intake. Anyhow, my A/F learning is now zero

Very easy to fix.
2) I decreased the boost limit. 21.8psi for Cobb's Stg II just seemed too high to me. I know that they do this because they deliver the maps across the entire nation and have people hitting high limits. However, my logs aren't showing any overboosting or spiking so I decreased it to 20.5 (and the same percentage in the other columns). This feels safer to me.

Now I'm waiting on my wideband so that I can check the AFR's and modify accordingly. I'm also thinking about upping the boost a little bit according to many of the ECUTek plots I have seen where they are custom tuning for around 18 in the midrange tapering to 15 at redline.

Also waiting on Dave

.... wanna check out some timing mods before I roll into those tables myself.

t

PapitoSTi · 05-18-2005, 05:45 PM

So was the easy Fix to the A/F learning at idle? I have an Apexi Power Intake. Looking at my logs at idle I am pulling 7.81, 1.41 MAF voltage.

WolfPlayer · 05-19-2005, 03:22 AM

Quote:

Originally Posted by PapitoSTi

So was the easy Fix to the A/F learning at idle? I have an Apexi Power Intake. Looking at my logs at idle I am pulling 7.81, 1.41 MAF voltage.

I modified the MAF table (advanced parameters and click on the MAF title). You basically look at what the A/F learning is at a particular MAF Voltage. Look up that MAF voltage in the MAF table. Take the value for that voltage and multiply it by the A/F learning. Examples ...

+5% A/F learning at 1.20 MAF Volts
Let's Assume the value for 1.20 MAF Volts is 3.1 g/s.
The new value will be 3.1 + (0.05 * 3.1) = 3.255 = 3.26.

-7.2% A/F learning at 1.20 MAF Volts
Let's Assume the value for 1.20 MAF Volts is 3.1 g/s.
The new value will be 3.1 - (0.072 * 3.1) = 3.255 = 2.88.

Make sure that you expand these changes to the adjacent cells and smooth things out a little.

After making these changes you have to drive your car around for awhile and let it relearn (or reset the ECU). This is one location where using the cursor tracing feature doesn't help you right away.

t

PapitoSTi · 05-19-2005, 04:44 PM

Can these changes be done on live tuning, on a real map or the base map? The reason I ask is that I am running Dave's real time map with the Knock changes.

WolfPlayer · 05-19-2005, 07:22 PM

Quote:

Originally Posted by PapitoSTi

Can these changes be done on live tuning, on a real map or the base map? The reason I ask is that I am running Dave's real time map with the Knock changes.

Yes, they can be done on live tuning ... however, you won't see the A/F learning change right away because it takes time for it to learn the new stuff ... like about 5 miles or so.

Dave said that he would work with me once I got my streettuner. Do you know how to get in contact with him? I tried sending him an e-mail but not sure if he got it. I have some ideas about the knock stuff and wanted to talk with him about it and look at what he did too.

t

PapitoSTi · 05-19-2005, 08:02 PM

Have you try his hotmail? I have been sending Dave my WOT logs so he can take a look and see if it running right for my setup. Right now I am waiting on his reply on my last WOT log.

PapitoSTi · 05-20-2005, 10:17 AM

Quote:

Originally Posted by WolfPlayer

I modified the MAF table (advanced parameters and click on the MAF title). You basically look at what the A/F learning is at a particular MAF Voltage. Look up that MAF voltage in the MAF table. Take the value for that voltage and multiply it by the A/F learning. Examples ...

+5% A/F learning at 1.20 MAF Volts
Let's Assume the value for 1.20 MAF Volts is 3.1 g/s.
The new value will be 3.1 + (0.05 * 3.1) = 3.255 = 3.26.

-7.2% A/F learning at 1.20 MAF Volts
Let's Assume the value for 1.20 MAF Volts is 3.1 g/s.
The new value will be 3.1 - (0.072 * 3.1) = 3.255 = 2.88.

Make sure that you expand these changes to the adjacent cells and smooth things out a little.

After making these changes you have to drive your car around for awhile and let it relearn (or reset the ECU). This is one location where using the cursor tracing feature doesn't help you right away.

t

I made the changes on my Maf values. Did not have to change but only three cells. I will log in a couple of day to see if any changes. Thanks.

gt42sti · 05-20-2005, 08:22 PM

Hey guys,

Been away on business...will be back next week. Victor...there is still some type of problem with your timing learning. I dont like those knock addition values. You have the exact same map cell values as my setup but your getting 4-5 degrees less knock advance. We may need to call Cobb on this problem.

I have 3 other members testing my timing maps all with excellent results and logs that show the same timing advance as my car. I dont get your situation.

Another test subject just ran a 12.60/112 or 113 with one of newest maps. That is with d/p only and a complete stock car.

That is fast.

Cheers

PapitoSTi · 05-21-2005, 05:18 AM

Quote:

Originally Posted by gt42sti

Hey guys,

Been away on business...will be back next week. Victor...there is still some type of problem with your timing learning. I dont like those knock addition values. You have the exact same map cell values as my setup but your getting 4-5 degrees less knock advance. We may need to call Cobb on this problem.

I have 3 other members testing my timing maps all with excellent results and logs that show the same timing advance as my car. I dont get your situation.

Another test subject just ran a 12.60/112 or 113 with one of newest maps. That is with d/p only and a complete stock car.

That is fast.

Cheers

Everything is the same. I don't know what could be wrong. My mods again:

TurboXS TBE
Walbro Fuel Pump
Helix Uppipe
Perrin Oil Catch Can
Apexi Ground Kit
GPMoto Elbow Air Duct
Stock airbox

I will reset the ecu and start over with the Knock changes. One thing I might be doing wrong, I am making the changes to the maps with the ignition key on the "on" position not while the car is running. That might be it. The car feel faster than ever before. Back to the drawing board.

An hour later: I reset the ecu, reloaded your real map and made all the changes like before while the car was running. I'll give it a couple of days before I log. Thanks

PapitoSTi · 05-21-2005, 06:17 PM

Well, my STi is gone. I had to sell it to my brother, I should say let him have it. Personal problem has force me to give my STi to my brother. So I am not a happy camper. I managed to remove the Street Tuner and set it back to stock. So I'll be selling it soon with the AP. I am pissed.

PapitoSTi · 05-26-2005, 07:36 AM

The AP and Street tuner for a 04 STi is for sell

05-18-2005, 03:37 AM	#1
WolfPlayer Moderator & ECU Tech Car: 05 CGM STI Fav Mod: mo boostaz Location: Fredneck, MD Posts: 3,695 Join Date: Jun 2004 Trader Rating: (6)	My first mods My first mods with ST: 1) I was always pulling about 4-5% A/F learning at idle RPMs. Basically this is around 1.20-1.35 on the MAF (voltage). I think this is from my modified intake. Anyhow, my A/F learning is now zero Very easy to fix. 2) I decreased the boost limit. 21.8psi for Cobb's Stg II just seemed too high to me. I know that they do this because they deliver the maps across the entire nation and have people hitting high limits. However, my logs aren't showing any overboosting or spiking so I decreased it to 20.5 (and the same percentage in the other columns). This feels safer to me. Now I'm waiting on my wideband so that I can check the AFR's and modify accordingly. I'm also thinking about upping the boost a little bit according to many of the ECUTek plots I have seen where they are custom tuning for around 18 in the midrange tapering to 15 at redline. Also waiting on Dave .... wanna check out some timing mods before I roll into those tables myself. t This ad is not endorsed by this member. Please register or login to hide this ad.

05-26-2005, 07:36 AM	#11
PapitoSTi Junior STI Driver Location: Atlanta, GA Posts: 123 Join Date: Oct 2003 Trader Rating: (0)	The AP and Street tuner for a 04 STi is for sell This ad is not endorsed by this member. Please register or login to hide this ad.

05-18-2005, 05:45 PM	#2
PapitoSTi Junior STI Driver Location: Atlanta, GA Posts: 123 Join Date: Oct 2003 Trader Rating: (0)	So was the easy Fix to the A/F learning at idle? I have an Apexi Power Intake. Looking at my logs at idle I am pulling 7.81, 1.41 MAF voltage.

05-19-2005, 04:44 PM	#4
PapitoSTi Junior STI Driver Location: Atlanta, GA Posts: 123 Join Date: Oct 2003 Trader Rating: (0)	Can these changes be done on live tuning, on a real map or the base map? The reason I ask is that I am running Dave's real time map with the Knock changes.

05-19-2005, 08:02 PM	#6
PapitoSTi Junior STI Driver Location: Atlanta, GA Posts: 123 Join Date: Oct 2003 Trader Rating: (0)	Have you try his hotmail? I have been sending Dave my WOT logs so he can take a look and see if it running right for my setup. Right now I am waiting on his reply on my last WOT log.

05-20-2005, 08:22 PM	#8
gt42sti Junior STI Driver Car: Silver 04 STI Location: Eugene,Or Posts: 116 Join Date: Oct 2004 Trader Rating: (0)	Hey guys, Been away on business...will be back next week. Victor...there is still some type of problem with your timing learning. I dont like those knock addition values. You have the exact same map cell values as my setup but your getting 4-5 degrees less knock advance. We may need to call Cobb on this problem. I have 3 other members testing my timing maps all with excellent results and logs that show the same timing advance as my car. I dont get your situation. Another test subject just ran a 12.60/112 or 113 with one of newest maps. That is with d/p only and a complete stock car. That is fast. Cheers

05-21-2005, 06:17 PM	#10
PapitoSTi Junior STI Driver Location: Atlanta, GA Posts: 123 Join Date: Oct 2003 Trader Rating: (0)	Well, my STi is gone. I had to sell it to my brother, I should say let him have it. Personal problem has force me to give my STi to my brother. So I am not a happy camper. I managed to remove the Street Tuner and set it back to stock. So I'll be selling it soon with the AP. I am pissed.