Here is my SD log showing average STFT and Tephra's MAF log showing average STFT.

The reason I show his rather than mine is not to be oppositional, but because I simply never used to collect STFT in my logs!

Both have some surprising outliers - this is completely normal. Overall though, it shows you can get your STFT just as good as MAF - if not better in this example?

 

On the top, SD, on the bottom MAF. On the left, max STFT, on the right min STFT.

 

I have a question about logging kpa. Since i am logging in psi do i just multiply the log by 6.895?

 

Yes as long as your readings are absolute (they should be since it is an absolute pressure sensor).

 

I've got the SD3 patch ported to the 94170015 ROM. I'll try to post the xml and the patched base ROM tomorrow.

 

Guess I will need to pick up a few things and give this SD3 patch a try.

 

A link to the SD3 patch for the 94170015 ROM is below. It was a little bit more tricky to implement because I had to add an 11 bit MAP ADC RAM variable. I also decided that even though baro is set so that it doesn't trip a CEL, I went ahead and killed the baro OBD-II test to save a few CPU cycles. As a result, there are a few extra lines of definitions in the xml file compared to the 88590015 patch.

How to use:

1) Install a MAP sensor, my MAP sensor patch, a MAT sensor, and my MAT sensor patch. Details on this step are outlined in other threads.

2) Copy the definitions in the xml file your your current 94170015.xml file, launch ECUFlash, open the patched ROM in ECUFlash, and copy all the SD values from the stock patched ROM to a copy of your current ROM. Upload your patched ROM to your ECU.

3) The SD patch is setup for a JDM Evo 9 3-bar MAP sensor (same MAP sensor used in all Evo 10s). If you using something other than a JDM Evo IX 3-bar MAP sensor, you'll need different MAP sensor calibration values. Best to look for an answer in this thread.

4) Drive car and adjust VE values as needed.

http://se30.dyndns.org:8080/EVO/9417..._JCSBSD3M3.zip

 

I can haz speed density?

 

I think a lot more people would get excited if this thread title said speed density and not SD. I figure this was a deliberate action on John's part

 

I was thinking the same, but the hit count is pretty high, so some people are definitely reading it.

 

I must check this thread at least 2 times a day. I think each day the progress seems to get better by the day.I deffinately have full intensions of converting my car to SD. AEM features with stock safety FTMFW

 

I reread this thread 6 to 8 times a day to get an understanding of the VE functions so I can tune with it once my sensors arrive. people are waiting to pipe up in here not due to the title, but because there isn't yet widespread implementation of this patch. once the heavy usage roms start reporting success, you will see this thread explode.

 

Well i've been playing with the patch.

I have now wired up my MAT sensor and disconected my MAF / MAS sensor.

No cels have appeared and the car starts and runs.

However I do have some problems getting the correct calibrations.

JCS gave me some settings to try before he went on holiday, which I have tried today, along with some of my own.

The car now responds perfect WOT and replicated the way it used to run about 98 - 99%, which is good enough for me.

However idle and cruise are still a bit off where they need to be, and I don't fully understand the calculations needed to workout what they should be set at.

The car seems to take a while to settle down to idle, but it does get there in the end.

However on part throttle cruise, I get a "popping" effect, which seems to be a fueling issue, where the car goes lean for a split second every few seconds.

Very hard to explain, and I have no idea how to fix it, as I don't know if it's RPM VE or Map Calibration that needs tweaking, and I don't know how to calculate the values needed in either case lol.

I am sure I will get there in the end though

 

Its got my attention also Eddie

 

Nice, Todd. I will bring the evo by once everything is up and running, and we can work on your speed density conversion.