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MembersPage/MichaelRichards/Projects/NicksGTX/Fuel (2005-02-13 16:44:10)

Most of these settings are copied from Fero's config.txt

  1. Priming pulse at -40 F [100 usec] eg. 0x40 * 100uS = 6400uS
primep=3C
  1. Priming pulse scaling at 170 F (0x80=half, 0xFF=same as cold) 0xA0 = ~63%
primep_temp_scaling=59
  1. typically cwh =~Â| 0.2 * cwl
  2. Cranking pulsewidth [x100 usec] at -40F (-40C) eg. 0xE0 * 100uS = 22400uS
cwl=5A
  1. Cranking pulsewidth [x100 usec] at 170F ( 76.6C) eg. 0x40 * 100uS = 6400uS
cwh=0F
  1. Cranking threshold [x100 rpm] eg. 0x03 * 100rpm = 300rpm
cranking_thres=04
  1. Afterstart warmup enrichment (%added value) 0x50 = 80%
awev=0F
  1. Afterstart warmup scaling at 170 F (0x80=half, 0xFF=same as cold) 0xA0 = ~63%
awev_temp_scaling=A0
  1. Afterstart number of engine cycles, NOTE: This is not ignition events anymore
awc=64
  1. warmup_clt_range defines the temperature bins used for interpolation
  2. the values in warmup_clt_range is degrees Fahrenheit + 40
  3. C = 5/9 * F - 40
  4. F = 9/5 * C + 72
warmup_clt_range[0]=00 # -40.0 C

warmup_clt_range[1]=14 # -28.8 C

warmup_clt_range[2]=28 # -17.7 C

warmup_clt_range[3]=3C # -6.6 C

warmup_clt_range[4]=50 # 4.4 C

warmup_clt_range[5]=64 # 15.5 C

warmup_clt_range[6]=78 # 26.6 C

warmup_clt_range[7]=8C # 37.7 C

warmup_clt_range[8]=AA # 54.4 C

warmup_clt_range[9]=C8 # 71.1 C

  1. Warm up enrichment as function of temperature, biased at 100 (0x64)
  2. enrichment @-40.0C
warmup_clt[0]=FF

warmup_clt[1]=FA

warmup_clt[2]=F5

warmup_clt[3]=F0

warmup_clt[4]=E6

warmup_clt[5]=C7

warmup_clt[6]=AA

warmup_clt[7]=91

warmup_clt[8]=82

warmup_clt[9]=64

  1. no enrichment (0x64==100 which is *1.0) @71.1C and above
  1. warmup enrichment can be decreased as a function of rpm.
  2. set all to 0x64 to disable
warmup_rpm[0]=64 # 100%

warmup_rpm[1]=64

warmup_rpm[2]=64

warmup_rpm[3]=64

warmup_rpm[4]=64

warmup_rpm[5]=64

warmup_rpm[6]=64

warmup_rpm[7]=64

  1. injectors 391cc @ 3bar == 40.273 lb/hr
  2. engine 1860 cc == 113.46 cid
  3. req fuel == 7.4 ms change to 100us units -> 74
  4. doubled VE values and divided req_fuel by two to increase resolution
  6. req fuel is changed to 3.2 mS
req_fuel=20

TODO: I don't understand how to calculate this. It came from Dave's setup but I'm running 550cc injectors.

  1. squirt on missing thooth and on tooth 30.
divider=01

alternate=03

TODO: Can't find any docs on these. I need to go fully sequential injection to get a good idle with these big injectors.

  1. I measured the injector opening time with scope, by adding a 0.1 ohm current
  2. measuring resistor in between fet and injector, then measuring the voltage
  3. over resistor with the scope. I turned out to be ~ 1.36 mS
  4. injopen=55 # 0x55 * 16 = 1360 uS [16usec] based
injopen=0D

battfac=22 # changed to 00 from 28 -> 0x28 * 16 = 640 uS / Volt [16usec] based

  1. MAP range [2kPa] 0: use A/B lookup table
  2. 2.5 bar MAP sensor: 8D
  3. 1.15 bar MAP sensor: (hexa) 39
  4. 5.1 bar MAP sensor (impressive boost !!): FF (max value)
kpafac=8D

kpaofs=52

  1. not used
injocfuel=00
  1. no pwm-ing please
injpwm=2A

injpwmt=0A

injpwm6=0A

  1. 4 Cylinder (12000/4) = 3000 (0x0BB8)
rpmk[0]=0B

rpmk[1]=B8

  1. 0: TPSDOT, 1: MAPDOT acceleration enrichment
tpsdot_kpadot_conf=00
  1. Accel TPSDOT threshold (throttle sensitivity), this specifies the
  2. minimum rate of change to enable any acceleration enrichment
tps_thresh=8F
  1. Acceleration duration [0.1 sec] eg. 0x0A * 0.1 = 1 second
tpsasync=02
  1. Acceleration cold multiplication factor, biased at 0x64 eg. 0x64 - bias = 0
acmult=64
  1. Cold acceleration added amount (at -40 F degrees) [x100 usec]. eg. 0x14 * 100uS = 2000uS
tpsacold=02
  1. Rate of change bins for use with tps_thresh. If 14 =< actual delta(throttle position)
  2. < 28 then tpsdotrate[1] is the active bin.
  3. define the tps-dot bins: d(tps)/[0.1 sec]
tpsdotrate[0]=02

tpsdotrate[1]=10

tpsdotrate[2]=1F

tpsdotrate[3]=23

  1. TPS acceleration amount (fn TPSDOT) [100 usec]. This is the acceleration enrichment
  2. pulsewidth, the active bin is determined by tpsdotrate[].
tpsaq[0]=02

tpsaq[1]=04

tpsaq[2]=05

tpsaq[3]=08

  1. Deacceleration fuel cut, 100(0x64) means no fuelcut because of sudden tps-release.
  2. This can cause lean condition, misfire, kill-the-cat etc, so take care.
  3. 00 would be rough behaviour, other value under 96% (0x60) is dangerous, I'd leave it at 100%:
tpsdq=64
  1. Decel fuelcut enabled above threshold [x100 rpm] eg. 0x0F * 100 = 1500rmp
decel_fuelcut_thres=0F
  1. Overrun fuelcut: injectors disabled above this [x100 rpm]
  2. 16 (0x10) x 100 = 1600rpm when engine.tps <= config.iac_tps_thres (TPS fully released)
overrun_fuelcut=FF
  1. Overrun fuelresume, injectors reenabled below this [x100 rpm]
  2. eg. 13 (0x0D) x 100 = 1300rpm. Must be lower than overrun_fuelcut.
overrun_fuelresume=11
  1. Rev limit (hard) [x100 rpm] eg. 0x4B * 100rpm = 7500rpm
rev_limit=42