[WolfPlayer]

Both jaygoesfast and I have been working separately on maps that have been rescaled to deal with the problem of stock Cobb maps going off the chart at WOT. I spent some time yesterday and took a stock Cobb Stage II map and rescaled all of the ignition and timing maps to be more appropriate. For those that haven't been following every post on this forum, this was done because with a stock Cobb Stage II map I was hitting 3.10 load ... and the stock fuel and primary ignition only go to 2.75 load (with the DAs going to 2.90). I rescaled the map to 3.30 load and it also contains a 3.10 load point.

Cobb doesn't use real linear interpolation between values (ST v1.0.4.2) so I had to do a lot of exporting to Excel, linear interpolating, saving as CSV, modifying in notepad, and then repasting back into ST. However, the results so far appear to be worth it. I flashed a BASE map of this into the ECU this morning, then sent over the realtime map, and then reset the ECU. The drive to work this morning was uneventful ... which is good. Everything felt normal. Awesome. I will do some more testing this weekend and if all goes well I will post this map as a better place to start than a standard Cobb Stage II 1.10 map.

t

[jays05]

Continuing where we left off in the other thread...

I rescaled the base Stage 2 v1.10 map initially, then copy-pasted the customized areas of my old map to the new one (I love how you can open ST twice and copy/paste between maps). I had to copy the MAF scaling, target boost, wastegate duty cycle, dynamic advance A and B maps, and the lower right corner of primary fuel.

The only map I did not rescale was Primary Ignition (for now). For primary fuel and the dynamic advance maps I removed the 0.40 load column, slid everything over, and added a 3.25 load column. It was probably not the best way, but it was the easiest and had zero impact on the fuel/timing curves. On the dynamic advance A and B maps I pulled one degree of timing at 3.25 load, and in primary fuel I richened it up by two tenths. My car is coming very close to 3.25 load however between 3k-4k so it is running a little richer now at WOT, I will probably change that column to be 3.5 load instead. I took a three day weekend, so I have some time to play with the car.

[WolfPlayer]

My wife, kids, and I just did a 200 mile round trip to my parent's house ... all on this rescaled Cobb Stage II map. Perfect. No problems. As smooth at the stock Cobb Stage II map. EGT's and AFR's are the same. Hopefully I will get a chance to do some WOT testing this weekend and then I'll release this map for general consumption. Again, this is a stock Cobb Stage II ST map with the load columns changed in order to provide a better start for tuning. This is not a tuned map.

t

[04stiguy]

I'm game for verification on my '05..........

[WolfPlayer]

Done and released for general consumption. This is for an '05 STi. There is a readme file, some WOT runs with Wideband data, and of course the actual Base Map. Please note that I have hundreds of miles on this base map and have confirmed with a wideband that it operates like a Cobb Stage 2 map on my car. I use it everyday on my car. However, as with any posted map that you didn't create yourself - running this map is at your own risk and you take full responsibility for any negative things that may happen.

Here is the contents of the ReadMe file...

Created by WolfPlayer on 8/1/2005

This started off as a Cobb Stg 2 v1.10 map for an '05 STI and was created in v1.0.4.2. It will only open in StreetTuner for an '05 STI. I started off with the stock map and rescaled it in order to provide more high load columns for tighter control of WOT. With a stock Cobb Stage 2 map my load often hit 3.10. Cobb's maps only go to 2.75 for main ignition and main fuel. This, for me, is unacceptable. Thus, I rescaled the tables in order to provide for extra higher load columns. I ended up with 3 higher load columns. All higher load columns contain the same data as the highest load column in the stock Cobb Stage 2 map. It is up to you to tune these columns. I HAVE NOT OPTIMIZED THEM! In order to rescale these maps I derived new spacing for the columns and then used true linear interpolation to determine the actual value the ECU would be using if Cobb had supplied the maps like this. The following maps have been modified:

Primary Fuel
Main Ignition
Dynamic Advance A
Dynamic Advance B
Dynamic Advance C
AVCS

This map drives identical to a stock Cobb Stage 2 v1.10 map on my car. I completed a few hundred miles of driving before this release to the general public. These miles were uneventful with no hiccups or 'interesting' behavior. The car drove normal. WOT still shows that the AFRs are rediculously rich (as they were with the stock Cobb Stg2 1.10 map). See the attached CSVs which are logs of WOT runs and also contain Wideband Oxygen sensor data obtained from my LC-1 wideband.

Please note that this is absolutely NOT an optimized map! It is just a stock Cobb Stg 2 map that has been rescaled. Thus, it still has the pitfalls of a stock Cobb Stg 2 map.

To Install:
I have provided a Base Map. Burn as you would any normal base map. Simple as that. If you want to run a RealTime map please keep in mind that Cobb's Dynamic Advance C map is not RealTime Save-able. To run it as a RealTime map do the following:

1) Open two instances of StreetTuner.
2) Load the rescaled Base Map in both Instances.
3) With one instance of StreetTuner, connect to the ECU.
4) With the other instance of StreetTuner save the Base Map as a RealTime map.
5) With the instance NOT connected, copy the Dynamic Advance C table.
6) With the instance that is connected, Load the RealTime map saved in (4) above.
7) With the instance that is connected, go to DA C and Paste the DA C you copied in (5).

Link to the ZIP file with base map, ReadMe, and WOT CSVs:
http://www.bescaredracing.com/sti/st...age2v110rs.zip

Happy Tuning!
t

[TurboQueef]

Originally Posted by WolfPlayer

Done and released for general consumption. This is for an '05 STi....... Happy Tuning!
t

Tim,

Got it ... works great Thank-you

[WolfPlayer]

Originally Posted by TurboQueef

Tim,

Got it ... works great Thank-you

Jeff (and others),

Keep in mind that you guys can adjust the last 3 columns to WHATEVER load values you want. Right now the 3.10, 3,25, and 3.40 load columns have the same values across the board in all the cells. These values are the values from Cobb's 2.75 load column. If you find that you would rather have a 3.0, 3.2, and 3.4 column then just change them That's the beauty of this. I'll probably even change them myself later I'll probably keep the 3.10 load value but modify the others.

t

[04stiguy]

Thanks!!

I will post feedback.

[WolfPlayer]

I loves me a rescaled map

As usual, I was doing some AFR tuning this morning on the way to work. Just reviewed the data and was curious why I was hitting mid-10's in AFR after I adjusted it to 11:1. Then I looked at the load and observed that I was hitting 3.18 load . This morning was cooler and less humid. Given that I have a 3.10 load column and a 3.25 load column and my 3.25 column is richer ... everything happened exactly as it was suppose to happen . The ECU richened things up. Very nice. I also noticed that the ECU overshot the boost target when it hit 3.18 load. Not sure how much it overshot since the Subaru Select Monitor (SSM) that Cobb uses seems to top out at 18.42 boost. I only have 18.0 psi specified right now so it shot over by at least ~0.50 psi. Looks like rescaling for a boost creep situation is working - w00t (for those that are curious why I only have 18 psi specified instead of my previously indicated 18.5 ... it is because when I did the rescaling I decided to tune AGAIN from scratch. Why? because I wanted to approach things from a BFI instead of a BIF perspective and I am slowly working my boost back up).

... and boy o boy did my WOT third gear pull from 2000rpms to redline feel good this morning. The car has never felt this fast. I think I was finally impressed by a gear other than first gear . Of course, my timing is still 100% stock because I am tuning from scratch and the ECU decided to be generous and fed me some very nice Dynamic Advance (27d total at 6500).

t

[drfrink24]

When playing around with my street tuner, I noticed you cannot add columns, just alter the headings. So... what if you ran an upgraded turbo, and had engine load values from .5 to lets say, 4.5?

Wouldn't you have all the more grey area since instead of going from 1, 1.5, 2, it would be 1 2 3?

Whats the safest interpolated gap distance between load columns?

[WolfPlayer]

Originally Posted by drfrink24

When playing around with my street tuner, I noticed you cannot add columns, just alter the headings. So... what if you ran an upgraded turbo, and had engine load values from .5 to lets say, 4.5?

Wouldn't you have all the more grey area since instead of going from 1, 1.5, 2, it would be 1 2 3?

Whats the safest interpolated gap distance between load columns?

I don't know the safest interpolated gap distance for sure. However, I can predict that it is big. For example, let's assume you have 0.25, 0.4, 0.55, 0.7, 0.85, and 1.0. That is 6 points total. Now, lets assume that there is a straight line between 0.25 and 1.0 such that the 4 middle points (0.4, 0.55, 0.7, and 0.85) all fall on that line. Given this type of situation you do not need those 4 middle points. You can effectively eliminate those 4 columns because the ECU should interpolate between 0.25 and 1.0 to ascertain the correct value on that line. This frees up 4 columns that you can add.

Another option is to find columns that have the same values as the columns that are directly to the left and to the right of it. In this instance removing that column does nothing because when the ECU goes to interpolate between values that are identical, it will come up with a value that is ... well ... identical.

Also, I don't think you are going to reach loads as high as 4.5 unless you are running crazy crazy boost. I could be wrong ... but 4.5 just seems overly huge. I'm currently seeing 3.2 load with somewhere around 18.5 psi. Even bumping that up to 21psi isn't going to get you to 4.5 ... IMHO (although I freely admit that I have absolutely no experience that justifies my answer in this instance ... just going with intuition and gut feeling).

t

[cnstman]

at a load value of 4.5 you may be exceeding the limits of the stock sensors that are used to calculate load. With that said, I-Speed is running around 600 crank on a ECUtek reflash, that should be enough HP for 99% of the subaru comunity.

[drfrink24]

Originally Posted by WolfPlayer

I don't know the safest interpolated gap distance for sure. However, I can predict that it is big. For example, let's assume you have 0.25, 0.4, 0.55, 0.7, 0.85, and 1.0. That is 6 points total. Now, lets assume that there is a straight line between 0.25 and 1.0 such that the 4 middle points (0.4, 0.55, 0.7, and 0.85) all fall on that line. Given this type of situation you do not need those 4 middle points. You can effectively eliminate those 4 columns because the ECU should interpolate between 0.25 and 1.0 to ascertain the correct value on that line. This frees up 4 columns that you can add.

Another option is to find columns that have the same values as the columns that are directly to the left and to the right of it. In this instance removing that column does nothing because when the ECU goes to interpolate between values that are identical, it will come up with a value that is ... well ... identical.

Also, I don't think you are going to reach loads as high as 4.5 unless you are running crazy crazy boost. I could be wrong ... but 4.5 just seems overly huge. I'm currently seeing 3.2 load with somewhere around 18.5 psi. Even bumping that up to 21psi isn't going to get you to 4.5 ... IMHO (although I freely admit that I have absolutely no experience that justifies my answer in this instance ... just going with intuition and gut feeling).

t

Thanks for the response Wolf... Yeah, the numbers I presented are hypothetical, presumed to be possible only with an upgraded turbo.

[RacerXS]

Got the ST about a week ago, been reading everything I can find trying to bone up. Just loaded the rescaled map & have done some light tuning so far with good results.
Thanks very much Wolf (and others) for your time & effort, i hope this is only the beginning.

[WolfPlayer]

Originally Posted by surfa2527

Got the ST about a week ago, been reading everything I can find trying to bone up. Just loaded the rescaled map & have done some light tuning so far with good results.
Thanks very much Wolf (and others) for your time & effort, i hope this is only the beginning.

w00t! Glad everything is working out great for you and the others. We needed this map!

t