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Posted by: zielritter Feb 28 2011, 06:42 PM

I'm so excited that I finally got this to work that I thought it deserved it's own thread . After many, many months of research and trial and error I've finally have my Touring set up with a SAFC2 piggyback and AEM wideband to tune the fuel. The last piece of the puzzle was figuring out what wire to tap for the RPM signal, and I ended up tapping the ignition coil signal. This weekend I'm going out for a street tune with the UEGO.

It's not pretty yet, but I'll get the mounting straight later.

http://img546.imageshack.us/f/file0110.jpg/

Posted by: slowgls Feb 28 2011, 09:23 PM

Very nice!!!

Posted by: sarge Feb 28 2011, 09:49 PM

Sweet - hopefully the tuning goes well.

Give us the details when you've got it settled. You've got one sweet Touring... jealous a bit

Posted by: zielritter Mar 5 2011, 12:51 PM

Just got back from about an hour and a half on back roads and the interstate getting the AFR right. I had a goal of about 13 across the rpm band based on what I had read on the internetz. I did all of my pulls in 3rd gear which gave me the safest gear to do pulls all the way up to the red line.

It proved to be a little more difficult than I anticipated mainly due to the SAFC2 only having 12 rpm points to work with. It seems to guess in between the rpm points you set, which is fine if you set them only 200 rpms apart. But, if there's more than 200rpms between your set points it sometimes guesses a little wrong.

All and all i'm pretty happy. Seems like the tangible difference is that the power doesn't appear to drop off near the top of the rev band. It keeps pulling all the way up presumably due to the afr not plummeting to 11 or so near the top. For the most part I hit 12.8 - 13.1 from 3000 to red line. I went ahead and switched to higher octane fuel too just to be safe. I listed my corrections below. One thing that was weird as you'll see is that I actually added fuel in the mid 3k's. Don't know why the factory map is like this. Guess I'll figure out if it was a good or bad move once I get on a dyno this summer.

3000: -4% 3400: +8% 3600: +5% 4000: -5% 4400: -10% 4600: -11% 4800-5400: -13% 5800-red line: -15%

Posted by: elantragt Mar 6 2011, 08:44 AM

When you do get it dyno'ed... add the sheet http://www.elantraclub.com/forum/index.php?autocom=times ok?

Posted by: zielritter Mar 6 2011, 04:35 PM

Will do. I took the ET out for another ride to tweak my tune again today. I think what I may have been seeing yesterday was being influenced by the ECU. Turns out I don't go into WOT literally till the pedal is mashed to 100% throttle. A few Tibby guys had originally recommended 80% for my hi-throttle settings, but I think this may have been creating problems with my ECU and causing my tune to drift (as evidence by my AFR coming back down to sub-optimal levels at WOT after my original corrections were made).

Anyways, I set my hi-throttle map to 99% meaning that I'll only be making corrections when I have the throttle at 100%. The throttle position sensor on the ET only goes above 4V at this point according to the sensor check on the SAFC, at which point the ECU registers open loop according to the shop manual. Using this new setting my new corrections seem to be more in line with what I've seen others using:

3400: -3% 3800: -8% 4400: -15% 4600,4800,5000,5200,5400,5600: -16% 5800: -17% 6000,6400: -18%

Again, this isn't perfect by any means, but my AFR from 3k on stays about 12.7-13.2, which hopefully generates a few more ponies than the 11.1-12.2 range it was with the stock maps. I really don't think I can get it much better than this.

Posted by: zielritter Mar 7 2011, 07:12 AM

One more thing I wanted to add to this. People are always talking about how the ecu learns around the corrections made in closed loop mode. What I never realized is how quickly this occurs. You can make a changes when you're idling and literally see the change on the wideband occur then be undone within a matter of seconds. Pretty neat to actually see that in action.

Posted by: silet Mar 7 2011, 10:56 AM

If I may add one warning please. Keep on eye on your temp gauge. Normally running rich of peak should keep cylinder head temps down, but watch the temps.

Posted by: zielritter Mar 8 2011, 02:33 PM

Thanks for the advice. Overheating and any related detonation is definitely what I'm trying to avoid. Fortunately, I only leaned it for WOT use, and I'm not one to be redlining it constantly . I do want to at some point learn how to really drive and get involved in some auto-x events (I know... a wagon/hatch isn't the best choice. I've heard every joke), which would make it more of a concern.

Posted by: zielritter Mar 10 2011, 09:35 PM

Ok, I have had some observations over the past days that I am curious about. As I mentioned earlier, I did my tune pulling from third gear. What I've noticed is that in a lower gear (ie 2nd), the same tuning corrections show up much leaner on the wideband. The inverse seems to be true for higher gears. Is this something that is common or should be concerning? I know most tuners use 4th on the dyno and aim for 13:1. Does tuning in forth make it dangerous for them to do pulls to redline in lower gears?