Blm adjust
Thread Starter
Instructor
Joined: Oct 2014
Posts: 162
Likes: 1
From: Steinbach
Blm adjust
Hi!
So thanks to people on this site I've adjusted my overall blm from being rich, to something that is very close on my tune. Now I'm curious what you think on adjusting one cell . Do I use the Maf vs voltage setting or go with the pw vs load?
It's basically only one cell at the 1600 rpm that is a bit rich.
The car runs really strong and I'm still running stock timing till I get the blm's right.
The pic shows a bit lean up top but not to worry. It was with a ten % injector increase which I have made adjustment for.
So thanks to people on this site I've adjusted my overall blm from being rich, to something that is very close on my tune. Now I'm curious what you think on adjusting one cell . Do I use the Maf vs voltage setting or go with the pw vs load?
It's basically only one cell at the 1600 rpm that is a bit rich.
The car runs really strong and I'm still running stock timing till I get the blm's right.
The pic shows a bit lean up top but not to worry. It was with a ten % injector increase which I have made adjustment for.
Melting Slicks
Joined: Aug 2003
Posts: 3,399
Likes: 394
From: Lakeville MI
You can reduce the low pulse width injector offset table values below 1.708 ms to target the problematic region.
If you have any ethanol in your fuel, you may also want to enrichen the stoichiometric AFR accordingly.
If you have any ethanol in your fuel, you may also want to enrichen the stoichiometric AFR accordingly.
Thread Starter
Instructor
Joined: Oct 2014
Posts: 162
Likes: 1
From: Steinbach
No ethanol in premium fuel here. How does this change look? It's getting colder here and plan to data log if it warms up, hopefully soon.
Melting Slicks
Joined: Aug 2003
Posts: 3,399
Likes: 394
From: Lakeville MI
The table you have shown has no effect unless you uncheck the Base PW Calc method switch...which changes (almost) everything with respect to fueling. This method has its own merits, but would not be recommended in this case.
I was referring to the injector low pulse width offset table:
;---------------------------------------------
; LOW PULSE WIDTH INJECTOR OFFSET
; vs BASE PULSE WIDTH
; Dissassemby of abtc, LINES = 15
; 12-10-1995, 20:21:35
;
; TBL = 65.536 * Msec
;---------------------------------------------
ORG $03C3 ; Msec Msec
;---------------------------------
LC3C3 FCB 18 ; 0.275 0.488
LC3C4 FCB 15 ; 0.229 0.732
LC3C5 FCB 13 ; 0.198 0.976
LC3C6 FCB 10 ; 0.153 1.22
LC3C7 FCB 8 ; 0.122 1.46
LC3C8 FCB 5 ; 0.076 1.708
LC3C9 FCB 3 ; 0.046 1.95
LC3CA FCB 1 ; 0.015 2.197
LC3CB FCB 0 ; 0.000 2.44
LC3CC FCB 0 ; 0.000 2.685
LC3CD FCB 0 ; 0.000 2.929
LC3CE FCB 0 ; 0.000 3.17
LC3CF FCB 0 ; 0.000 3.41
LC3D0 FCB 0 ; 0.000 3.66
LC3D1 FCB 0 ; 0.000 3.90
;---------------------------------------------
I was referring to the injector low pulse width offset table:
;---------------------------------------------
; LOW PULSE WIDTH INJECTOR OFFSET
; vs BASE PULSE WIDTH
; Dissassemby of abtc, LINES = 15
; 12-10-1995, 20:21:35
;
; TBL = 65.536 * Msec
;---------------------------------------------
ORG $03C3 ; Msec Msec
;---------------------------------
LC3C3 FCB 18 ; 0.275 0.488
LC3C4 FCB 15 ; 0.229 0.732
LC3C5 FCB 13 ; 0.198 0.976
LC3C6 FCB 10 ; 0.153 1.22
LC3C7 FCB 8 ; 0.122 1.46
LC3C8 FCB 5 ; 0.076 1.708
LC3C9 FCB 3 ; 0.046 1.95
LC3CA FCB 1 ; 0.015 2.197
LC3CB FCB 0 ; 0.000 2.44
LC3CC FCB 0 ; 0.000 2.685
LC3CD FCB 0 ; 0.000 2.929
LC3CE FCB 0 ; 0.000 3.17
LC3CF FCB 0 ; 0.000 3.41
LC3D0 FCB 0 ; 0.000 3.66
LC3D1 FCB 0 ; 0.000 3.90
;---------------------------------------------
