Engine: Fiat Coupe 2,0 16V Turbo
- Displacement: 1995ccm
- Bore: 84mm
- Stroke: 90mm
- Cilinders: 4 in line
- Firing order: 1-3-4-2
- Distribution: by belt, DOHC (2 cams in head)
- Rotation: right
- Wasted Spark ignition
- Multi point indirect injection
Tuned parts:
- Turbocharger: Garrett GT3076R, (external wastegate), assumed pressure appp. 1-1,5 bar
- Bigger throttle body: Diameter: 70mm
- NA camshafts (same timing, bigger lift)
- Exhaust manifold: tubular type
- Bigger IC
- Bigger injectors
Sensors (which are used in my project):
- Crankshaft (Trigger 1): VR type, 60-2 teeth
- Throttle position sensor (TPS): Bosch 0 280 122 001
- Water temperature sensor (WT):
-type: negative temperature NTC (appr. 2252 Ohm at 25°C)
-mark: Bosch 0 280 130 026
-impedance at -10°C = 9 kOhm
-impedance at +20°C : 2,5 kOhm
-impedance at +80°C : 0,3 kOhm
-voltage: 5V
- Intake Air Temperature sensor (IAT):
-type: negative temperature NTC (appr. 2252 Ohm at 25°C)
-mark: Bosch 0 280 130 060 ( from Lancia Kappa 2,0 16V Turbo)
-impedance at -10°C = 9 kOhm
-impedance at +20°C : 2,5 kOhm
-impedance at +80°C : 0,3 kOhm
- Manifold Absolute Pressure sensor (MAP):
-VEMS internal MAP sensor (On-Board)
-Max. pressure: 400 kpa
- WBO2 Lambda sensor: Wideband LSU 4.9,
Bosch 0 258 017 025
Measured Rcal: 85 Ohm = calibration 149,4
(When did free air calibration, value was 144)
- Exhaust Gas Temperature sensor (EGT):
type: VEMS, 6mm
Actuators:
- Ignition: wasted spark type with 2 coils
Coils: Marelli BAE 800B (060708038010) (Fiat Punto,Coupe, Lancia Delta,Thema,Y,...)
-Primary coil resistance: 0,54 Ohm
-Secondary coil resistance: 7500 Ohm
(dwel set to 3ms)
-Spark plugs: NGK BP6ET (3 electrodes in circle)
- Injection: Injectors type: Peak & Hold
Number of injectors: 4
Resistance of 1 injector: 2,5 Ohm @ 68F (did you verify by measurement ?)
Siemens DEKA FI11445, 750 cc/min @ 43,5 PSI
Why not using high impedance injector instead ? Plenty available between 700..870cc/min, even from Siemens.
- Series resistor for injectors are used: OEM type, cca 7 Ohm per each injector.
- PWM-ing settings 25.5 msec, 100%
injA EC36/7 cyl1
injB EC36/19 cyl2
injC EC36/8 cyl4
injD EC36/20 cyl3
-Fuel pressure: 3 bar
- Boost Control Valve: for this time Manual Boost controller is used
- Idle valve: OEM type, PWM one coil
Used VEMS controller:
v3.8
ING OUT: 4x IGBT + 4x logic level
MAP: Internal 400kPa
EGT: 1
Prim.Tr.: VR
Sec.Tr.: Hall
internal nernst pull up for LSU 4.9
wbo2 pump pw zero: 100
wbo2 nernstdc target 134
egt1 cal: 72
batt cal: 190
Serial: 11294
INJ OUT: Flyback: low Voltage flyback (OBSOLETE)
- apparently accidentally ordered with "Low voltage flyback (OBSOLETE)" option
- => impossible to tune good idle with 0.5msec injector pulsewidth
- while identical engine works well with lowZ-active flyback but PWM-ing disabled => would work well with 30V flyback.
For faster injector closing, convert to 30V flyback by installing [30V unidir transient diode] in the harness:
- anode: injector shared +12V supply
- cathode: ECU side (going to ECU internal flyback rail via EC36/23)
- Make sure injector PWM-ing is disabled (100% duty, after time 25.5msec)
- retune. Longer injector pulsewidth will be needed (so better VE precision unless quickly hacking some large injopen values)
- really retune carefully: even if higher power loadsites were tuned, pushing it without retuning would cause lean operation, knocking, and likely damage
Thanks, i am sure about retune after install transient diode.
When i want to install diode inside, is this the good way?
Could i use diode BY399 DC from rescue kit or is necessary to use 1k5E30 diode?