Fuel Injector Deadtimes

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Every fuel injector type has a unique minimum injection time and latency for it to fully open once energized.

This latency is often referred to as injector lag, dead time, offset, or delay (ip_ti_add_dly__vb).

It is strongly dependent on the supply voltage and therefore stored in an interpolated table.

The minimum injection time is also important to make sure the injection pattern is clear and complete. (c_ti_min_iv). Minimum injection time is calculated by subtracting the dead time at 14v from the minimum pulse width.

All values here are meant for the standard fuel pressure of 3.5 bars (50.76 psi). The flow rate for different pressures can be calculated here: Injector Calculator

The voltage describing Y-axis ldpm_vb_1 is also used for the ignition coil charging Dwell time tables ip_td_*. Be careful with changes to the axis values!

ATTENTION: The conversion factor of the old definitions files is wrong. Correct conversion factor for injector deadtime is "X * 0.032", resulting in a range of 0.00ms to 8.16ms.

BMW M52TU OEM injectors

Siemens part number: A2C59511971 / 1427240

Flow rate: 225cm³/min @ 3.5 bar

Minimum injection time M52TUB20: 0.640ms

Minimum injection time M52TUB23/28: 0.624ms

kf_ti_add_totz__ub
V ms
0.0 3.65
6.0 3.65
8.0 1.84
10.0 1.23
12.0 0.81
14.0 0.55
16.0 0.39
25.0 0.06

BMW M54B30 OEM injectors

Siemens part number: A2C59514053 / 1439800

Flow rate: 252cm³/min @ 3.5 bar

Minimum injection time: 0.725ms

ip_ti_add_dly__vb
V ms
0.0 3.328
6.0 3.328
8.0 1.408
10.0 0.864
12.0 0.576
14.0 0.384
16.0 0.256
25.0 0.032

Bosch 0280150945 312cc Red-tops (Ford F1SE-E5A)

Bosch 0280150945 Injector

Flow rate: 337cm³/min @ 3.5 bar

Minimum injection time: 0.496ms

ip_ti_add_dly__vb
V ms
0.0 3.33
6.0 3.33
8.0 1.41
10.0 0.86
12.0 0.58
14.0 0.38
16.0 0.26
25.0 0.03

Bosch 0280158227 375cc (Ford BR3E-E5A)

  • These will require an EV1 to EV14 adapter to use them with an M5X fuel injector harness.

Flow rate: 435cm³/min @ 3.5 bar

Minimum injection time: 0.460ms

ip_ti_add_dly__vb
V ms
0.0 4.91
6.0 4.91
8.0 2.35
10.0 1.62
12.0 1.19
14.0 0.94
16.0 0.85
25.0 0.85

These are OE injectors for the 2011-2015 Ford Mustang 5.0. (Ford part # BR3E-E5A)

Bosch 0280155968 440cc Green Giants

Bosch 0280155968 Injector

Flow rate: 466cm³/min @ 3.5 bar

Minimum injection time: 0.468ms

ip_ti_add_dly__vb @ 3 bar
V ms
0.0 4.986
6.0 4.986
8.0 2.098
10.0 1.321
12.0 0.919
14.0 0.670
16.0 0.47
25.0 0.47
ip_ti_add_dly__vb @ 3.5 bar
V ms
0.0 5.216
6.0 5.216
8.0 2.208
10.0 1.376
12.0 0.960
14.0 0.704
16.0 0.480
25.0 0.480

(Same values apply to Bosch 280150558 green-tops (Ford Part# M-9593-F302)

Bosch 0280158123 627cc Porsche 997tt

Bosch 0280158123 Injector

Flow rate: 677cm³/min @ 3.5 bar

Minimum injection time: 0.448ms

ip_ti_add_dly__vb
V ms
0.0 2.94
6.0 2.94
8.0 2.94
10.0 1.58
12.0 1.15
14.0 0.73
16.0 0.55
25.0 0.55

Siemens DEKA 6900371 440cc/min 42lb/hr "VOLVO Turbo"

Minimum injection time: 0.501ms

ip_ti_add_dly__vb
V ms
0.0 4.44
6.0 4.44
8.0 1.88
10.0 1.15
12.0 0.94
14.0 0.85
16.0 0.77
25.0 0.04

Siemens DEKA FI114961 (107961) 630cc/min

39.15 PSI/270 kPa:

Minimum injection time: 0.981ms

ip_ti_add_dly__vb
V ms
0.0 2.60
6.0 2.60
8.0 1.45
10.0 0.94
12.0 0.64
14.0 0.43
16.0 0.26
25.0 0.26

Siemens DEKA FI114991 (110324) 875cc/min 80lb/hr

39.15 PSI/270 kPa:

Minimum injection time: 0.202ms

ip_ti_add_dly__vb
V ms
0.0 2.811
6.0 2.811
8.0 1.777
10.0 1.288
12.0 1.017
14.0 0.801
16.0 0.639
25.0 0.639

Injector Dynamics ID1050X 1065cc/min (101 lb/hr)

  • These will require an EV1 to EV14 adapter to use them with an M5X fuel injector harness.

Flow rate: 1235cm³/min @ 3.5 bar

Minimum injection time: 0.200ms

ip_ti_add_dly__vb
V ms
0.0 2.025
6.0 2.025
8.0 2.025
10.0 1.475
12.0 1.160
14.0 0.955
16.0 0.825
25.0 0.825