For the low throttle or ???

 

Sorry, I was in a rush...

I haven't hit the highway yet, but "around town" type stuff, there is a definite improvement. The g/cyl range I mentioned here is used much more often than I thought. Basically anytime you roll into the throttle at non-highway speeds.

 

My '03 timing table is exactly the same. I think they pulled timing in the high octane table in the cruise range due to the higher compression ratio of the LQ9. If you can look at a LQ4 file, those dips do not appear in the hi octane table (and the timing is a bit lower).

I have also smoothed out the part throttle region of the timing tables. Definitely noticable around town. Just keep an eye out for excessive KR. For one or two tunes I would get 1 or 2 degrees of KR around 2000 rpms from too much timing in that area. Fixed now.

 

Cool, thanks Deezel.

I did get a small amount of KR a few logs ago. I actually got it at 800rpm pulling away from a stop. Another time I got it right smack in the middle of that smoothed over section - so I backed out of there by 1* in most areas. I was only getting like .8*KR, but still.

What have you done to the rest of the HO timing table?

I smoothed over the higher rpm dip that was around the 4000-5200 range. I more or less took the peak timing at 3600 or whatever, and set it straight across the board... I more or less did this for .28 - .72 g/cyl. "Less" in the higher g/cyl range. I was pretty conservative with my higher .76 graph - this is what I'm using at WOT. I haven't run this yet...

 

I actually just noticed this table... EGR spark advance correction. I don't recall seeing this until after I upgraded my HPT version. Could be just a coincidence. Leave it to me to miss something like this.

Timing is added "around" the g/cyl vs rpm timing hole that's in the stock HO timing table.

I don't have an EGR system on the truck. It's disabled in the "General" tab in HPT. So is this table used? Is it there to "correct" the lack of this system?

What I think I'm going to try is overlaying this EGR table on top of my original HO timing table, and simply zero-out the EGR table. See what the graph looks like then.