Evo X - Self Tuning
Posted: Tue Jul 05, 2011 10:30 am
Not sure if this belongs in the tuning section or the Evo X section, my results are specific to the Evo X so here it is.
My Tactrix cable arrived in the mail last week, and I purchased a wideband O2 sensor so that I could start tuning my ride.
I would like to report my results thus far. My wideband sensor hasn't been configured properly so I have been very very careful in not changing anything too drastically. In fact, so far the only thing I have changed is the high octane fuel map.
Prior to starting to tune, I logged a lot of data by using Evoscan, enabling mode 23, blah blah a lot of detail that I won't bore you with, if you want to know, PM me.
As you all know, the Evo X runs really rich stock and one could even say excessively rich. So much so that at certain times, the engine literally chokes on its own fuel. By leaning out the AFR slightly, I have gotten immediate, tangible gains. Having a K&N panel filter also helps a lot. This gave me immediate gains as well due to the leaning out of the AFR.
Here is the stock fuel map (lower number is richer, higher number is leaner).
I changed some of the numbers slightly to this:
I drove around, testing it at idle, WOT, cruising to make sure there was no excessive knocking.
Result: The car feels completely different!!! At low RPMs, the "dead spot" is gone and it just pulls strongly all the way to redline. It just feels so much more responsive, and the car doesn't bog down in corners even in "normal" mode - cornering becomes a lot more fun.
I am just blown away by how some quick changes just changes the car so much. However, do bear in mind that the moment you play with the ECU, your warranty is voided so do so at your own risk!
This is just the beginning - once I learn more and get better results, I'll start posting it up, so watch this space.
My Tactrix cable arrived in the mail last week, and I purchased a wideband O2 sensor so that I could start tuning my ride.
I would like to report my results thus far. My wideband sensor hasn't been configured properly so I have been very very careful in not changing anything too drastically. In fact, so far the only thing I have changed is the high octane fuel map.
Prior to starting to tune, I logged a lot of data by using Evoscan, enabling mode 23, blah blah a lot of detail that I won't bore you with, if you want to know, PM me.
As you all know, the Evo X runs really rich stock and one could even say excessively rich. So much so that at certain times, the engine literally chokes on its own fuel. By leaning out the AFR slightly, I have gotten immediate, tangible gains. Having a K&N panel filter also helps a lot. This gave me immediate gains as well due to the leaning out of the AFR.
Here is the stock fuel map (lower number is richer, higher number is leaner).
I changed some of the numbers slightly to this:
I drove around, testing it at idle, WOT, cruising to make sure there was no excessive knocking.
Result: The car feels completely different!!! At low RPMs, the "dead spot" is gone and it just pulls strongly all the way to redline. It just feels so much more responsive, and the car doesn't bog down in corners even in "normal" mode - cornering becomes a lot more fun.
I am just blown away by how some quick changes just changes the car so much. However, do bear in mind that the moment you play with the ECU, your warranty is voided so do so at your own risk!
This is just the beginning - once I learn more and get better results, I'll start posting it up, so watch this space.