VE definition? (cross-platform w/ AEM)
#21
I tried AEM's autotune, which uses a target AFR table to tune the PW map, and it made some scary changes within a few hundred feet so I turned it off, this was years ago. that too should work well if I took the time to learn how to set the various autotune control settings.
#22
Elite Member
iTrader: (9)
Join Date: Jun 2006
Location: Chesterfield, NJ
Posts: 6,902
Total Cats: 399
ok then. I will look at it. But at the moment I can't think of a reason for a separate fuel trim due to rpm. That's kinda sorta the point of the fuel map. Especially cylinder specific. Maybe if one injector's dead time varies differently as rpms increase compared to the others to the point of warranting a trim. And who gets that info besides figuring it out on your own using the methods you described a while ago.
Ahh ok that makes more sense thanks. Slick. If the injector dead time curve/battery offset was accurate I'm sure your rows are fairly flat, less funky intake resonances or vtec and whatnot. Boost comp makes the columns flat. Tweak individual zones as needed with somewhat greater resolution. I.e. my bit values in the 100 kpa row are less than 100. I think.
Flat, as in all 100's, initially.
I choose uS per bit initially that gives me those 100's.
i.e. 100 x us/bit = fuel pulse width I need at 100 kPa.
boost comp curve crosses 0% correction at 100 kPa.
I choose uS per bit initially that gives me those 100's.
i.e. 100 x us/bit = fuel pulse width I need at 100 kPa.
boost comp curve crosses 0% correction at 100 kPa.
#26
ok then. I will look at it. But at the moment I can't think of a reason for a separate fuel trim due to rpm. That's kinda sorta the point of the fuel map. Especially cylinder specific. Maybe if one injector's dead time varies differently as rpms increase compared to the others to the point of warranting a trim.
#27
Elite Member
iTrader: (9)
Join Date: Jun 2006
Location: Chesterfield, NJ
Posts: 6,902
Total Cats: 399
Yeah that makes good sense. I will try this. I know my 100kpa row is good so I can get a ms per bit starter value and the rpm trim curve from that row. The high vacuum rows are good too so I can calculate a bost comp slope that should be accurate enough for my 1:1 regulator.
Thread
Thread Starter
Forum
Replies
Last Post
zacktrotter_uncc
MSPNP
3
10-05-2023 10:49 AM
Savington
Engine Performance
660
04-24-2023 02:21 PM