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Fuel Injector Deadtimes
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.
Hint: In order to work with an unmodified, factory fuel injector harness on M5X engine cars, the injectors used must have an EV1/Jetronic (square/rectangular) connector. Injectors with an EV6/EV14/USCAR (oval) connector will require adapters.
BMW OEM
BMW M52TU OEM injectors
- Siemens Part Number: A2C59511971
- BMW Part Number: 1427240 / 7546244
Data
- Qstat: 162 g/min (n-heptane)
- Flow rate: 237cm³/min @ 3.5 bar
Minimum injection time M52TUB20: 0.640ms
Minimum injection time M52TUB25/28: 0.624ms
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
- BMW Part Number: 1439800 / 7546245
Data
- Qstat: 186 g/min (n-heptane)
- Flow rate: 272cm³/min @ 3.5 bar
Minimum injection time: 0.725ms
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 |
Alpina B3S OEM injectors
- Bosch Part Number: 0280156370
- BMW Part Number: 13641703819
Data
- Qstat: 150g/min (n-heptane)
- Flow rate: xxx cm³/min @ 3.5 bar
Minimum injection time: 0.352ms
V | ms |
---|---|
6.0 | 2.688 |
7.0 | 1.792 |
8.0 | 1.408 |
10.0 | 0.928 |
12.0 | 0.640 |
14.0 | 0.416 |
16.0 | 0.256 |
25.0 | 0.064 |
Bosch
Bosch 0280150945
312cc Red-tops (Ford F1SE-E5A) Flow rate: 337cm³/min @ 3.5 bar
Minimum injection time: 0.496ms
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
These will require an EV1 to EV6/EV14 adapter to use them with an M5X fuel injector harness.
375cc (Ford BR3E-E5A)
Flow rate: 435cm³/min @ 3.5 bar
Minimum injection time: 0.460ms
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
Flow rate:
- 42 lbs/hr, 450 cc/min at 43.5 psi (3.0 BAR)
- 47 lbs/hr, 490 cc/min at 50.0 psi (3.5 BAR)
- 51 lbs/hr, 535 cc/min at 58.0 psi (4.0 BAR)
This is the official Bosch Data, which according to a multitude of forums and our own personal testing does not seem to be correct. We advise you try our values found below these and if they are not working, try the official data:
Minimum injection time: 0.468ms
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 |
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 |
The values we have extrapolated from data from Volvo, Ford, Toyota and fiveoMotorsport that seem to be working properly are as follows:
Minimum injection time: 0.468ms
V | ms |
---|---|
0.0 | 3.552 |
6.0 | 3.552 |
8.0 | 1.472 |
10.0 | 0.896 |
12.0 | 0.608 |
14.0 | 0.352 |
16.0 | 0.224 |
25.0 | 0.032 |
(Same values apply to Bosch 280150558 green-tops (Ford Part# M-9593-F302)
Bosch 0280158123 627cc
Alternative partnumber: 997 605 132 02 (Porsche)
Flow rate: 677cm³/min @ 3.5 bar
Minimum injection time: 0.448ms
V | ms |
---|---|
0.0 | 3.072 |
6.0 | 3.072 |
8.0 | 3.072 |
10.0 | 1.408 |
12.0 | 0.992 |
14.0 | 0.768 |
16.0 | 0.576 |
25.0 | 0.576 |
If you encounter odd fueling issues, try using the following info instead.
Minimum injection time: 0.160ms
V | ms |
---|---|
0.0 | 3.330 |
6.0 | 3.330 |
8.0 | 2.020 |
10.0 | 1.250 |
12.0 | 0.860 |
14.0 | 0.540 |
16.0 | 0.350 |
25.0 | 0.030 |
Bosch 0280158124 382cc
Flow rate: 412cm³/min @ 3.5 bar
Minimum injection time: 0.499ms
V | ms |
---|---|
0.0 | 2.560 |
6.0 | 2.560 |
8.0 | 1.856 |
10.0 | 1.216 |
12.0 | 0.864 |
14.0 | 0.640 |
16.0 | 0.480 |
25.0 | 0.032 |
Bosch 0280158040 980cc
Flow rate: 1058cm³/min @ 3.5 bar
- These injectors are not recommend for use on pump gas because of how low of a pulse width they idle at.
- When using these injectors with an M54 intake manifold, you need to use 14mm top hats (the o-ring diameter is 14mm and the top hat itself is 14mm). Additionally, the area of the connector hits the intake manifold so you need to rotate the injectors and use an extension harness to be able to plug them in.
Minimum injection time: 0.160ms
V | ms |
---|---|
0.0 | 2.592 |
6.0 | 2.592 |
8.0 | 2.080 |
10.0 | 1.760 |
12.0 | 1.376 |
14.0 | 1.152 |
16.0 | 0.960 |
25.0 | 0.800 |
Siemens DEKA
Siemens DEKA 6900371 440cc/min 42lb/hr (Volvo 1.9l turbo)
Flow rate: 440cc/min @ 3 bar
475cc/min @ 3.5 bar
Minimum injection time: 0.501ms
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
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
43.5PSI / 300kPa:
Minimum injection time: 0.600ms
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 |
- Ford M-9593-LU80 injectors likely have the same dead time values, but have an EV6/EV14/USCAR connector.
Others
Injector Dynamics ID1050X 1065cc/min (101 lb/hr)
- These will require an EV1 to EV6/EV14 adapter to use them with an M5X fuel injector harness.
Flow rate: 1235cm³/min @ 3.5 bar
Minimum injection time: 0.200ms
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 |
Lucas/Delphi 42.5 lb/hr 445cc
Part number: 01D030B
Minimum injection time: 0.410ms
V | ms |
---|---|
0.0 | 4.35 |
6.0 | 4.35 |
8.0 | 1.82 |
10.0 | 1.12 |
12.0 | 0.77 |
14.0 | 0.58 |
16.0 | 0.51 |
25.0 | 0.10 |