Re: CHT balance - ljet
Posted: Sun Aug 27, 2017 7:12 pm
Good to know, I'm definitely interested to dig in to the details - will I be able to tweak inj duty cycle per cyl? Assuming yes, but if not, I'll fall back on megasquirt. Once I have the hardware set up, the move from one to the other should be "easy".
I have a few year old "ign-4" waste spark module and a pair of bip363 drivers . . . Kinda wish I had sprung for "smart" coils, but I'll start with these. Not really sure where to start on the ignition map side, I think I have a better idea about fuel. Definitely more research to do.
In more analog news, I finally took the time today to figure out how the AFM/adjustments work. Assuming this post is accurate
https://www.thesamba.com/vw/forum/viewt ... 7d913ff921
my flapper was much too tight/running lean. Certainly CHTs agree along with my almost fully threaded in idle mix screw. Anyway, I loosened up the cog by 9 or so teeth to get to the 60gram target. Pretty much dropped the afr 1-1.5 points across the map - idle mix screw is now back at mid point. More importantly, #3 is now running at least 10-15 deg cooler - around 380 now when I used to almost be pushing 400. Good news. I do think that it's a bit too rich under light, lower speed, conditions, but I don't know that I have enough adjustability to correct.
Anyway, at least good enough to keep me going until the speeduino is operational.
-Chris
I have a few year old "ign-4" waste spark module and a pair of bip363 drivers . . . Kinda wish I had sprung for "smart" coils, but I'll start with these. Not really sure where to start on the ignition map side, I think I have a better idea about fuel. Definitely more research to do.
In more analog news, I finally took the time today to figure out how the AFM/adjustments work. Assuming this post is accurate
https://www.thesamba.com/vw/forum/viewt ... 7d913ff921
my flapper was much too tight/running lean. Certainly CHTs agree along with my almost fully threaded in idle mix screw. Anyway, I loosened up the cog by 9 or so teeth to get to the 60gram target. Pretty much dropped the afr 1-1.5 points across the map - idle mix screw is now back at mid point. More importantly, #3 is now running at least 10-15 deg cooler - around 380 now when I used to almost be pushing 400. Good news. I do think that it's a bit too rich under light, lower speed, conditions, but I don't know that I have enough adjustability to correct.
Anyway, at least good enough to keep me going until the speeduino is operational.
-Chris