Advertising:

Fuel Injector Deadtimes

From MS4X Wiki
Revision as of 12:54, 3 November 2022 by Sda2 (talk | contribs) (→‎BMW M52TU OEM injectors)
(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)

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

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
  • BMW Part Number: 1439800 / 7546245

Data

  • Qstat: 186 g/min (n-heptane)
  • Flow rate: 272cm³/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

Bosch 0280150945

Bosch 0280150945 Injector

312cc Red-tops (Ford F1SE-E5A) 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

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

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

Bosch 0280155968 Injector

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

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

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

ip_ti_add_dly__vb @ 3.5 bar
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 (Porsche 997 605 132 02)

Bosch 0280158123 Injector
Bosch 0280158123 base map with FPR connected to manifold

Flow rate: 677cm³/min @ 3.5 bar

Minimum injection time: 0.448ms

ip_ti_add_dly__vb
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

ip_ti_add_dly__vb
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 0280158040

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

ip_ti_add_dly__vb
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

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

http://www.siemensdeka.com/product/80lbh-siemens-deka-4-mototron-high-impedance-long-style-uscar-fi114991/

43.5PSI / 300kPa:

Minimum injection time: 0.600ms

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
  • 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

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


Lucas/Delphi 42.5 lb/hr 445cc

Part number: 01D030B

Minimum injection time: 0.410ms

ip_ti_add_dly__vb
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