2012 SI Calibration Help

[EFICU]

You're welcome!

[Rmart980]

Everything has still been good no knocks. However today on the way home I turned my a/c on and was fine on the highway for couple hours just fine. one I exited the highway after the red light I noticed I had 3 knocks, and I don't drive it hard with the /ac on. So I started a datalog for the rest of my drive home with the a/c on. Got 2 more knocks and that was it. But as long as the a/c is off I'm not getting any. Is that to be expected when running the A/C? it won't let me upload the data log says its to large. But everything is still running good car still seems to have full power. No knocks still with A/C off.

[EFICU]

There is more load on the engine with the A/C on, but I always aim for zero knock in any scenario. I'm guessing they happened in 6th gear. A few knock on a drive is considered fine, but I aim for zero as because the power difference between just enough timing versus a little too much is very small IMO. My email address is in the "calibration" tab of your tune files. Email the datalog to me and we will make the necessary changes needed.

[Rmart980]

Ok I tried to send it email but its to large for that also. Its about hour 15 mins long but the knocks happened again right after I started the log so I think they were in lower gears between stop lights. I don't know if there is a way to trim the file down? I can also do another log with the A/C and see if it happens again?

[Rmart980]

There is more load on the engine with the A/C on, but I always aim for zero knock in any scenario. I'm guessing they happened in 6th gear. A few knock on a drive is considered fine, but I aim for zero as because the power difference between just enough timing versus a little too much is very small IMO. My email address is in the "calibration" tab of your tune files. Email the datalog to me and we will make the necessary changes needed.

ok got it sent to you.

[Rmart980]

There is more load on the engine with the A/C on, but I always aim for zero knock in any scenario. I'm guessing they happened in 6th gear. A few knock on a drive is considered fine, but I aim for zero as because the power difference between just enough timing versus a little too much is very small IMO. My email address is in the "calibration" tab of your tune files. Email the datalog to me and we will make the necessary changes needed.

I could not get that last datalog to trim down. I went out and made another log the first 10 mins. is without the a/c on and the the last 15 are with it on. I did not receive any knocks. but this is the log. I will go out later on when it gets warmer out and make another one.

[EFICU]

Hi Rick,

It looks great from what I can see. The knocks will have to be evident in the datalog for me to address any of them. Knocks can happen at random, so it may have been a instance of chance. I can always change the ignition compensation so it removes more timing when it gets hotter if you want. It already does some, but I can have add to the compensation table to remove more if you want. A datalog with the showing the knock is best of course.

Keep an eye on it. If you see something again just let me know. One thing you can do, since you have trouble trimming the datalogs, while on a drive, datalog for 20 minutes, hen click the datalog button to stop, wait a few seconds, then click the datalog button again to start a new datalog. That way you break it down into smaller 20 minute files and hopefully capture what you see.