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View Full Version : $42 VE adds up over 100 on stock bin?



EagleMark
01-29-2012, 08:20 AM
This has been a topic I bring up a lot when tuning $42 1227747 ECM that the totals come up over 100?

Just looked in TunerCat software and it is the same as the TunerPro XDF? http://www.thirdgen.org/techboard/images/smilies/doh.gif


Range is 0 to 100%, with both tables added together. If the main table has the RPM as the rows the ECU/XDF is incorrect. See the Tuning Guide Book sticky, chapter 5, '8063/'7747/'8746 section for a thread on the VE tables.
RBob.Just read those articles and none inperticular to $42. But $61 was noted it was RPM column and MAP rows, the XCU/XDF was wrong.
http://www.thirdgen.org/techboard/diy-prom/238695-idle-ve-waaayyyy-down.html
I have been wondering why VE Main and Adder add up to over 100? Over tha last 5 years I have found 4-5 XDF for $42 and combined them all, they were all the same as Mastiff pictured? Has this been wrong forever?


http://www.gearhead-efi.com/Fuel-Injection/attachment.php?attachmentid=1540&stc=1&d=1327814302

From the ASDX $42 hac

;---------------------------------------------
; MAIN FUEL (VE1) Vs. MAP Vs. RPM
;
; 10-05-2000 Dissassemby of ASDX
; 8 COL x 9 BLOCKS = 72 BYTES
;
; TBL = 2.56 * VE %
;---------------------------------------------
ORG $037C ;
L037C FCB 0 ; MIN RPM Val
L037D FCB 16 ; Min KPA MAP Val
L037E FCB 8 ; LINES/BLOCK
;---------------------------------------------
; 20 KPA MAP
; VE % RPM
;---------------------------------------------
L037F FCB 5 ; 2.0 400
L0380 FCB 10 ; 3.9 800
L0381 FCB 15 ; 5.9 1200
L0382 FCB 25 ; 9.8 1600
L0383 FCB 36 ; 14.1 2000
L0384 FCB 46 ; 18.0 2400
L0385 FCB 66 ; 25.8 2800
L0386 FCB 75 ; 29.3 3200
;---------------------------------------------
; 30 KPA MAP
; VE % RPM
;---------------------------------------------
L0387 FCB 36 ; 14.1 400
L0388 FCB 63 ; 24.6 800
L0389 FCB 79 ; 30.9 1200
L038A FCB 96 ; 37.5 1600
L038B FCB 107 ; 41.8 2000
L038C FCB 109 ; 42.6 2400
L038D FCB 106 ; 41.4 2800
L038E FCB 90 ; 35.2 3200
;---------------------------------------------
; 40 KPA MAP
; VE % RPM
;---------------------------------------------
L038F FCB 36 ; 14.1 400
L0390 FCB 64 ; 25.0 800
L0391 FCB 90 ; 35.2 1200
L0392 FCB 103 ; 40.2 1600
L0393 FCB 112 ; 43.8 2000
L0394 FCB 114 ; 44.5 2400
L0395 FCB 118 ; 46.1 2800
L0396 FCB 116 ; 45.3 3200
;---------------------------------------------
; 50 KPA MAP
; VE % RPM
;---------------------------------------------
L0397 FCB 45 ; 17.6 400
L0398 FCB 65 ; 25.4 800
L0399 FCB 97 ; 37.9 1200
L039A FCB 109 ; 42.6 1600
L039B FCB 117 ; 45.7 2000
L039C FCB 122 ; 47.7 2400
L039D FCB 125 ; 48.8 2800
L039E FCB 127 ; 49.6 3200
;---------------------------------------------
; 60 KPA MAP
; VE % RPM
;---------------------------------------------
L039F FCB 79 ; 30.9 400
L03A0 FCB 92 ; 35.9 800
L03A1 FCB 105 ; 41.0 1200
L03A2 FCB 116 ; 45.3 1600
L03A3 FCB 124 ; 48.4 2000
L03A4 FCB 127 ; 49.6 2400
L03A5 FCB 135 ; 52.7 2800
L03A6 FCB 137 ; 53.5 3200
;---------------------------------------------
; 70 KPA MAP
; VE % RPM
;---------------------------------------------
L03A7 FCB 97 ; 37.9 400
L03A8 FCB 100 ; 39.1 800
L03A9 FCB 108 ; 42.2 1200
L03AA FCB 120 ; 46.9 1600
L03AB FCB 126 ; 49.2 2000
L03AC FCB 136 ; 53.1 2400
L03AD FCB 140 ; 54.7 2800
L03AE FCB 137 ; 53.5 3200
;---------------------------------------------
; 80 KPA MAP
; VE % RPM
;---------------------------------------------
L03AF FCB 103 ; 40.2 400
L03B0 FCB 106 ; 41.4 800
L03B1 FCB 113 ; 44.1 1200
L03B2 FCB 123 ; 48.0 1600
L03B3 FCB 131 ; 51.2 2000
L03B4 FCB 135 ; 52.7 2400
L03B5 FCB 140 ; 54.7 2800
L03B6 FCB 141 ; 55.1 3200
;---------------------------------------------
; 90 KPA MAP
; VE % RPM
;---------------------------------------------
L03B7 FCB 110 ; 43.0 400
L03B8 FCB 115 ; 44.9 800
L03B9 FCB 122 ; 47.7 1200
L03BA FCB 125 ; 48.8 1600
L03BB FCB 133 ; 52.0 2000
L03BC FCB 143 ; 55.9 2400
L03BD FCB 144 ; 56.3 2800
L03BE FCB 152 ; 59.4 3200
;---------------------------------------------
; 100 KPA MAP
; VE % RPM
;---------------------------------------------
L03BF FCB 120 ; 46.9 400
L03C0 FCB 120 ; 46.9 800
L03C1 FCB 124 ; 48.4 1200
L03C2 FCB 127 ; 49.6 1600
L03C3 FCB 128 ; 50.0 2000
L03C4 FCB 148 ; 57.8 2400
L03C5 FCB 159 ; 62.1 2800
L03C6 FCB 160 ; 62.5 3200
And the adder:

; MAIN FUEL TBL vs RPM, FL2
;
; 01-31-2000 Dissassemby of asdx
; 17 BYTES
;
; TBL = 2.56 * VE %
;---------------------------------------------
ORG $03C7 ; VE % RPM
;---------------------------------
L03C7 FCB 64 ; 25.0 0
L03C8 FCB 100 ; 39.1 400
L03C9 FCB 100 ; 39.1 800
L03CA FCB 100 ; 39.1 1200
L03CB FCB 100 ; 39.1 1600
L03CC FCB 100 ; 39.1 2000
L03CD FCB 100 ; 39.1 2400
L03CE FCB 100 ; 39.1 2800
L03CF FCB 100 ; 39.1 3200
L03D0 FCB 105 ; 41.0 3600
L03D1 FCB 90 ; 35.2 4000
L03D2 FCB 82 ; 32.0 4400
L03D3 FCB 55 ; 21.5 4800
L03D4 FCB 45 ; 17.6 5200
L03D5 FCB 25 ; 9.8 5600
L03D6 FCB 0 ; 0.0 6000
L03D7 FCB 0 ; 0.0 6400

EagleMark
01-31-2012, 03:15 AM
Well it seems GM had made a mistake and when VE Main and VE added add up to over 100 all you get is 100. So that would explain why many 1227747 at WOT can not add more fuel, must add pressure and retune.

There has always been another big mistake in the way the Main VE table was made in the XDF. Rows should be RPM and Columns should be MAP kpa.

Thanks to RBob at:
http://www.dynamicefi.com/
and the conversation at TGO:
http://www.thirdgen.org/techboard/diy-prom/640139-ve-range-7747-a.html
we now have a correct $42 XDF. I will add it to the 1227747 $42 ECM information thread.