[WolfPlayer]

Well, I have been experimenting and playing and looking and thinking. Here is my new take on at least dynamic advance A and B. Others may know this and thus, this may not be new news ... but, I haven't seen anyone explicitly say this so here goes.

First, a couple of observations that took me awhile to notice ...<O</O

1) Dynamic Advance A and Dynamic Advance B are the same from 800rpms to 3600rpms.
2) Dynamic Advance A and Dynamic Advance B are the same from 0.25 load to 1.60 load.<O</O

What this means is that there is only one section of the tables that is different. This section is less than 25% of the total mapped area ... and it just so happens to be in the most dangerous section of the map: Mid-High RPM and High Load (this means WOT).<O</O

What I have observed is that after an ECU reset the ECU will start with Dynamic Advance A. I can't claim that this happens in all weather conditions and at all altitudes and with all the etc.'s involved here. All I know is that this seems to happen on my setup. At this point, each WOT run will try to zone in on a more appropriate advance (assuming DAM is at 1.0). What does this have to do with Dynamic Advance B? For me, Dynamic Advance B is a totally optimistic table. Long story short: It starts with A and ends with B so long as the octane is high enough and the ECU doesn't pick up any problem knock. Keep in mind that problem knock isn't just the binary on/off we see in our logs. FWIW, I never reached the B value. Never, ever. I would probably need some really high octane gas to get even close. However, IMHO, DA B sure seems like a maximum cap on dynamic advance. <O</O

Using the above information, you can do some cool things. Here is a first run example of what I did. Is it optimized yet? No. But, it is better than stock (for me). Both tables have been smoothed. The very low load area now has DA to improve MPG during cruise. Generally speaking, DA A is higher (to get more initial advance up front). DA B is lower (because I never reached the high values anyhow). How does DA C fit in? I don't know yet. Still working on that one.

You'll also notice my use of the expanded tables to really keep dynamic advance in check. It works too I hit 19+ psi on my gauge on my first pull in the low midrange. This was about 3.3 load in the logs and my DA jumped down to 1.5. Sweet. On the second pull the ECU adjusted the WGDC better and I hit my normal area. I'm loving the extended maps. So much more protection in cases when you are overboosting.

Enjoy.

t

[cnstman]

so do you take care of all your timing changes in the DA maps, or did you modify the primary also?

[jays05]

So if I made my DA A map be a 93 octane tune, and DA B a ~96 octane tune, it would follow the B map on higher octane fuel? I'll have to give it a try today, shouldn't be too hard to test. This explains why the DA B map is so aggressive from the factory in the high load areas.

[WolfPlayer]

Originally Posted by cnstman

so do you take care of all your timing changes in the DA maps, or did you modify the primary also?

You'll find varying opinions on how to tune ignition. Increases in timing I put in the DA. Decreases in timing I put in the main ignition.

t

[WolfPlayer]

Originally Posted by jaygoesfast

So if I made my DA A map be a 93 octane tune, and DA B a ~96 octane tune, it would follow the B map on higher octane fuel? I'll have to give it a try today, shouldn't be too hard to test. This explains why the DA B map is so aggressive from the factory in the high load areas.

My only recommendation would be to dump in higher octane, drive a few miles to burn up what is left in the lines, and then do an ECU reset. This, IMHO, would be the quickest way.

t

[gt42sti]

T,

Did you find some copies of my maps? Your maxing out the knockB tables at 9.88....exactly my setup. Also, try to make changes to knockC by adding a degree or two. It seems there is a direct wot correlation and dynamic advance follows suit. Keep up the good work!

Cheers,
Dave

[WolfPlayer]

Originally Posted by gt42sti

T,

Did you find some copies of my maps? Your maxing out the knockB tables at 9.88....exactly my setup. Also, try to make changes to knockC by adding a degree or two. It seems there is a direct wot correlation and dynamic advance follows suit. Keep up the good work!

Cheers,
Dave

Nope. You never sent one to me so I had to figure it out on my own. Tested it for about a week and then shared my findings with the world Once I get DA C figured out I'll share that with the world too The stock tables has DA C fairly conservative ... more similar to DA A, and yet the stock curves will allow a fairly high total DA that goes well past DA C. I'll play with it once I get a hypothesis going with regard to this table.

w00t

t

[gt42sti]

Originally Posted by WolfPlayer

Nope. You never sent one to me so I had to figure it out on my own. Tested it for about a week and then shared my findings with the world Once I get DA C figured out I'll share that with the world too The stock tables has DA C fairly conservative ... more similar to DA A, and yet the stock curves will allow a fairly high total DA that goes well past DA C. I'll play with it once I get a hypothesis going with regard to this table.

w00t

t

I wish it were that easy. I can post end results and point others in the direction on how to do it but I cant post complete maps.

That said, it does seem to follow suit if you limit DA B to 9.88 it will limit total DA to no higher than 10. Also, DA C plays some important role and changes made in C will directly influence final DA. But, why

I have been playing with the K/N Typhoon and higher boost values lately and have needed to completely rewrite my timing maps due to higher load values across the board. Jury is still out on the Typhoon and I should test the Cobb intake as well.

Cheers

[WolfPlayer]

Originally Posted by gt42sti

I wish it were that easy. I can post end results and point others in the direction on how to do it but I cant post complete maps.

No problem. Just take some screenshots and send them to me or to somebody else here who has server access and we can post them for you. I have plenty of space on my webserver and still have a fair amount left that I could post here using iwsti's server.

I have been playing with the K/N Typhoon and higher boost values lately and have needed to completely rewrite my timing maps due to higher load values across the board. Jury is still out on the Typhoon and I should test the Cobb intake as well.

High intake temps seem to decrease timing. That's my complaint with the typhoon. Also, you shouldn't have to totally rewrite your timing maps due to higher load values so long as things were dialed in with a rescaled map. Should just have some tweaking to do.

t

[gt42sti]

Originally Posted by WolfPlayer

No problem. Just take some screenshots and send them to me or to somebody else here who has server access and we can post them for you. I have plenty of space on my webserver and still have a fair amount left that I could post here using iwsti's server.

:-) I have the server access and the space. I dont wish to have "dave hall" maps taken out unsupervised and have legal people knocking at my door. Doh



High intake temps seem to decrease timing. That's my complaint with the typhoon. Also, you shouldn't have to totally rewrite your timing maps due to higher load values so long as things were dialed in with a rescaled map. Should just have some tweaking to do.

t

:-)


I have the server access and the space. I dont wish to have "dave hall" maps taken out unsupervised and have legal people knocking at my door. Doh

Yep, typhoon has higher intake temps...but, I have not seen reduction in DA. I will test this further but I have increased my boost level across the board. This has resulted in DA table samples moved over a column. So, yes some tweaking needs to be done on DA cells.

Good stuff!

Cheers

[cnstman]

http://forums.nasioc.com/forums/showthread.php?t=845616

i got to re-read this post later, there is alot of good info in it!