FuelTech FT550 is a 52-pin wire-in FuelTech ECU on 2 connectors: A (26 pins) and B (26 pins).
It has 12 injector outputs and 8 ignition outputs. The injector drivers are saturated, which means high-impedance injectors. Low-impedance ones need a ballast resistor pack or a different ECU. The ignition outputs are logic-level. Smart coils plug straight in; dumb coils need an igniter in between.
There are 2 dedicated trigger inputs, each happy with a VR or a Hall sensor. There is no knock input on the ECU itself; knock control needs a separate knock box. Wideband control needs an external controller, usually over CAN. The MAP sensor is built in.
It has H-bridge outputs labelled for an electronic throttle, so drive-by-wire runs from the ECU itself. Two CAN buses handle dashes, PDMs and expansion. Four outputs can switch 12V as well as ground. The maker rates the 5V sensor supply at 150 mA in total.
Spec sheet
| Connectors | A (26), B (26)52 pins in this profile |
|---|---|
| Injector outputs | 12saturated (high-impedance only) |
| Ignition outputs | 8logic-level: smart coils, or an igniter for dumb coils |
| Dedicated trigger inputs | 2VR or Hall |
| Knock inputs | None on the ECUknock control needs an external knock box |
| Onboard wideband controllers | 0 |
| Onboard MAP sensor | Yes |
| CAN buses | 2 |
| Drive-by-wire | Yes |
| High-side outputs | 4 |
| Half-bridge outputs | 4H-bridge pairs for a throttle motor or stepper |
| 5V sensor supply | 1 pin150 mA stated by the maker |
Worth knowing
- No native knock input; knock needs an external knock box.
- 8 grey ignition outputs; yellow outputs can take further ignition channels.
Which builds it suits
Of the 58 swap presets in the planner, 0 fit as they are and 58 fit with add-ons, so every one of them can be made to work. The add-on it asks for most often is a CAN wideband module. The planner fills anything a preset leaves open with its ordinary defaults, so your own build may land differently.
The Ford Coyote Predator 5.2 (GT500, cross-plane, S/C) needs a dash with spare I/O and a CAN wideband module. The BMW N54 (3.0 twin-turbo I6) needs a direct-injection driver module and a CAN wideband module.
Fits with add-ons 58
- Toyota 1JZ-GE distributor (NA, early) with a CAN wideband module, an external igniter
- Toyota 1JZ-GE VVT-i (coil pack) with a CAN wideband module, an external igniter
- Toyota 1JZ-GTE non-VVTi with a CAN wideband module, an external igniter
- Toyota 1JZ-GTE VVTi with a CAN wideband module, an external igniter
- Toyota 2JZ-GE distributor (NA, early) with a CAN wideband module, an external igniter
- Toyota 2JZ-GE VVT-i (coil pack) with a CAN wideband module, an external igniter
- Toyota 2JZ-GTE non-VVTi with a CAN wideband module, an external igniter
- Toyota 2JZ-GTE VVTi with a CAN wideband module, an external igniter
- GM LS1 (Gen3 5.7 alum) with a CAN wideband module
- GM LS6 (Gen3 5.7 alum) with a CAN wideband module
- GM LS LQ4/LQ9 (Gen3 6.0 iron) with a CAN wideband module
- GM LS2 (Gen4 6.0 alum) with a CAN wideband module
- GM LS3 (Gen4 6.2 alum, car) with a CAN wideband module
- GM LS L76 (Gen4 6.0 alum) with a CAN wideband module
- GM LS L92 (Gen4 6.2 alum) with a CAN wideband module
- GM LS LY6/L96 (Gen4 6.0 iron) with a CAN wideband module
- GM LSA (Gen4 6.2 alum, S/C) with a CAN wideband module
- GM LT1 (Gen5 6.2 alum) with a direct-injection driver module, a CAN wideband module
- GM LT4 (Gen5 6.2 alum, S/C) with a direct-injection driver module, a CAN wideband module
- Ford Coyote 5.0 Gen1 (2011-14) with a CAN wideband module, an external igniter
- Ford Coyote 5.0 Gen2 (2015-17) with a CAN wideband module, an external igniter
- Ford Coyote 5.0 Gen3 (2018-23) with a CAN wideband module, an external igniter
- Ford Modular 4.6 2V (SOHC) with a CAN wideband module, an external igniter
- Ford Modular 4.6 4V Cobra (NA, cable) with a CAN wideband module, an external igniter
- Ford Modular 4.6 4V Terminator (S/C, cable) with a CAN wideband module, an external igniter
- Ford Modular 5.4 4V Ford GT (S/C, cable) with a CAN wideband module, an external igniter
- Ford Modular 5.4 4V GT500 (S/C, DBW) with a CAN wideband module, an external igniter
- Ford Coyote Voodoo 5.2 (GT350, flat-plane) with a CAN wideband module, an external igniter
- Ford Coyote Predator 5.2 (GT500, cross-plane, S/C) with a dash with spare I/O, a CAN wideband module, an external igniter
- Ford Barra 4.0 NA (182/190/195) with a CAN wideband module, an external igniter
- Ford Barra 4.0 Turbo (240T/245T/270T/310T/325T) with a CAN wideband module, an external igniter
- Nissan RB20DET with a CAN wideband module, an external igniter
- Nissan RB25DET non-Neo S1 (R33, dumb coils) with a CAN wideband module, an external igniter
- Nissan RB25DET non-Neo S2 (R33, smart coils) with a CAN wideband module
- Nissan RB25DET Neo (R34) with a CAN wideband module
- Nissan RB26DETT (R32/R33, dumb coils) with a CAN wideband module, an external igniter
- Nissan RB26DETT (R34, smart coils) with a CAN wideband module
- Nissan VR38DETT (R35 GT-R) with a CAN wideband module
- Nissan SR20DET (S13) with a CAN wideband module, an external igniter
- Nissan SR20DET (S14) with a CAN wideband module, an external igniter
- Nissan SR20DET (S15) with a CAN wideband module
- Nissan VQ35DE (base, 2003-04) with a CAN wideband module
- Nissan VQ35DE Rev-Up (2005-06) with a CAN wideband module
- Nissan VQ35HR (High-Rev, 2007+) with a CAN wideband module
- Honda K20 (i-VTEC 2.0 NA) with a CAN wideband module
- Honda K24 (i-VTEC 2.4 NA) with a CAN wideband module
- Subaru EJ/FA EJ20 turbo single-AVCS (EJ207 v7-9) with a CAN wideband module
- Subaru EJ/FA EJ20 turbo dual-AVCS (EJ207 GRB 2008+) with a CAN wideband module
- Subaru EJ/FA EJ25 turbo single-AVCS (EJ257 2004-07) with a CAN wideband module
- Subaru EJ/FA EJ25 turbo dual-AVCS (EJ257 2008+) with a CAN wideband module
- Subaru EJ/FA FA20D (BRZ/86 NA) with a CAN wideband module
- Subaru EJ/FA FA20DIT (WRX turbo 2015+) with a direct-injection driver module, a CAN wideband module
- Mazda Rotary 13B-REW (FD RX-7) with a CAN wideband module
- Mazda Rotary 13B-MSP Renesis (RX-8 manual, 6-injector) with a CAN wideband module
- Mazda Rotary 13B-MSP Renesis (RX-8 auto, 4-injector) with a CAN wideband module
- Mazda Rotary 20B (Eunos Cosmo 3-rotor) with a CAN wideband module
- BMW S54 (3.2 NA I6, E46 M3) with a CAN wideband module, an external igniter
- BMW N54 (3.0 twin-turbo I6) with a direct-injection driver module, a CAN wideband module, an external igniter
Plan a build around the FuelTech FT550
Pin table
By connector: A carries 6 injector outputs, 4 ignition outputs and 2 trigger inputs; B carries 6 injector outputs, 4 ignition outputs and 7 analog inputs.
Show all 52 pins
| Pin | Function |
|---|---|
| A 1 | Blue output #1 (low-side ~5A; default injector) |
| A 2 | Blue output #2 (low-side ~5A; default injector) |
| A 3 | Blue output #3 (low-side ~5A; default injector) |
| A 4 | Blue output #4 (low-side ~5A; default injector) |
| A 5 | Blue output #5 (low-side ~5A; default injector) |
| A 6 | Blue output #6 (low-side ~5A; default injector) |
| A 7 | Power ground input |
| A 8 | Gray output #1 (low-side ~1A +5V src; ignition trigger – igniter or smart coil) |
| A 9 | Gray output #2 (low-side ~1A +5V src; ignition trigger – igniter or smart coil) |
| A 10 | Gray output #3 (low-side ~1A +5V src; ignition trigger – igniter or smart coil) |
| A 11 | Gray output #4 (low-side ~1A +5V src; ignition trigger – igniter or smart coil) |
| A 12 | Battery negative input |
| A 13 | 12V input from relay |
| A 14 | 5V output for sensors (150mA) |
| A 15 | CAN A (-) LOW |
| A 16 | CAN A (+) HIGH |
| A 17 | CAM sync signal input (Hall/VR) |
| A 18 | Magnetic RPM sensor reference (VR-) |
| A 19 | RPM signal input (crank; Hall/VR) |
| A 20 | White input #1 (configurable analog/digital) |
| A 21 | White input #2 (configurable analog/digital) |
| A 22 | White input #3 (configurable analog/digital) |
| A 23 | White input #4 (configurable analog/digital) |
| A 24 | White input #5 (configurable analog/digital) |
| A 25 | White input #6 (configurable analog/digital) |
| A 26 | White input #7 (configurable analog/digital) |
| B 1 | Power ground input |
| B 2 | Power ground input |
| B 3 | CAN B (-) LOW |
| B 4 | CAN B (+) HIGH |
| B 5 | White input #8 (configurable analog/digital) |
| B 6 | White input #9 (configurable analog/digital) |
| B 7 | White input #10 (configurable analog/digital) |
| B 8 | Blue output #7 (low-side ~5A; default injector) |
| B 9 | Blue output #8 (low-side ~5A; default injector) |
| B 10 | Gray output #5 (low-side ~1A +5V src; ignition trigger – igniter or smart coil) |
| B 11 | Gray output #6 (low-side ~1A +5V src; ignition trigger – igniter or smart coil) |
| B 12 | White input #11 (configurable analog/digital) |
| B 13 | White input #12 (configurable analog/digital) |
| B 14 | Blue output #9 (low-side ~5A; default injector) |
| B 15 | Blue output #10 (low-side ~5A; default injector) |
| B 16 | Gray output #7 (low-side ~1A +5V src; ignition trigger – igniter or smart coil) |
| B 17 | Gray output #8 (low-side ~1A +5V src; ignition trigger – igniter or smart coil) – default Tach output |
| B 18 | White input #13 (configurable analog/digital) – or PowerShift/strain-gauge + |
| B 19 | White input #14 (configurable analog/digital) – or PowerShift/strain-gauge - |
| B 20 | Blue output #11 (low-side ~5A; default injector) |
| B 21 | Blue output #12 (low-side ~5A; default injector) |
| B 22 | Yellow output #1 (half-bridge 5A; e-throttle/stepper/inj/aux) |
| B 23 | Yellow output #2 (half-bridge 5A; e-throttle/stepper/inj/aux) |
| B 24 | Yellow output #3 (half-bridge 5A; e-throttle/stepper/inj/aux) |
| B 25 | Yellow output #4 (half-bridge 5A; e-throttle/stepper/inj/aux) |
| B 26 | Ground for sensors |
Other FuelTech ECUs
The closest FuelTech unit is the FuelTech FT600. Against it, this one has 12 injector outputs (the FT600 has 16) and 52 pins (the FT600 has 68).
Source: FuelTech documentation for the FT550
Always verify against the manufacturer's manual and your tuner before wiring.