Not trying to dig this back up, but I do wanna comment that this is a great write up! Simplifies everything!

 

Some made Rep for this write up! A great place to start!

 

awesome write up!

 

great info! thanks for the write up man. I just got all the equipment and using an AEM wideband and gauge also using evoscan 2.8 . This is for my evo X, its already been tuned, I just want to do some logs.

I just had a few questions:

-On the serial cable, which pin is for AFR and which one need to be grounded?
-Where on evoscan do you select the parameters you want to log? = figured this one out.


-

 

my question is, what do you use to data log? i have boost/af gauges & in order to run sd you need something to control it? i dont believe stock ecu can log either.

 

Use Evoscan or Mitsulogger.

 

but where doi you run the logger wires from uego

 

I'm guessing it comes with a serial cable. You need a serial-to-usb adapter to plug into your laptop.

 

Is the wideband meter the same as purchasing the AEM uego wideband?

 

this is what i have. digital aem uego wideband sensor. on the box it says its loggable and has a blue wire specifically for it.

 

thanks for the excellent writeup, very informative! after 5 years and two evo's I'm going to learn to tune on my own. I'm done counting on other to tweak my car even though most all my tunes have been great, especially from Spec Ops motorsports. The time has come to learn this on my own and cannot wait. Wish me luck.

 

Awesome bro. bout time. GL

 

I know right ha. How you been Babi? heard you tamed a 800hp beast

 

Very informative... hope I don't blow my motor!

 

Notice that the timing @ 5224 rpm was 10* and after 6 counts of knock the timing was pulled to 8* by 5500 rpm. 6 counts of knock pulled 2* of timing, in line with our assumption that 3 counts of knock pull 1* of timing.

So what is the ECU telling us to do to combat knock?

We know from MTBT (minimum timing best torque) theory that we should advance the timing until we either stop making power or we see the onset of knock. In this case we clearly see the onset of knock. So what we have to do is pull 2-3* of timing to combat the knock in that rpm range.

Here is the way the log looked after I pulled timing. The boost was almost unchanged and the AFR was slightly leaner in that rpm range. Pulling the timing from 10* to 7* @ 5200 rpm cured the knock in this instance.



ok nice thing