MaxxECU PRO: The GEN1 Flagship With the Widest Channel Count

Quick answer: MaxxECU PRO is the most channel-dense ECU MaxxECU has ever built. It runs up to 12 cylinders fully sequentially with 16 peak-and-hold injector outputs at 8 A each, 12 ignition outputs and 30 general-purpose outputs. Inputs are 16 × 0–5 V analog, 10 digital (4 VR-capable), 6 temperature sensors, 2 knock sensor inputs and 12 TYPE-K/N EGT inputs to 1200 °C on a separate harness. It has dual wideband lambda, dual E-Throttle, dual CAN, Bluetooth, a built-in 8 G accelerometer, a 400 kPa MAP sensor and advanced drag racing functions, in a waterproofed aluminium case with shock absorbers. Weight 1137 g, 252 × 180 × 40 mm.

Rocket Speed Shop is the official MaxxECU distributor for the Baltics. Below: where PRO still wins, and where the newer GEN2 RACE has overtaken it.

Who the MaxxECU PRO is for

• Drag racing. PRO ships with advanced drag racing functions, a built-in 8 G accelerometer, three-stage launch control, rolling launch, after-launch power limiting and multi-stage nitrous with staged control. This is the model built around the dragstrip.
• Twelve-cylinder builds running fully sequentially — V12 and W12 conversions, 12 ignition outputs.
• Staged injection at high power. Sixteen injector outputs means primaries and secondaries on a V8, or a full 16-injector methanol setup.
• Cars with an enormous amount happening electrically. Thirty general-purpose outputs is more than any other MaxxECU. Fans, pumps, solenoids, lights, water-methanol, CO2 wastegate control, shift lights, parachute release, line lock — all directly from the ECU.
• Engines needing 12-cylinder EGT coverage. Twelve EGT inputs is more than even GEN2 RACE offers.
• Twin-throttle builds. Dual E-Throttle support as standard.
• Cars with two CAN networks — one for gearbox and expansion, one for OEM vehicle CAN or a dash and logger.

Key features

Sixteen injector and twelve ignition outputs

Peak-and-hold injector drivers at 8 A per output, one or two high or low impedance injectors per output. Twelve ignition outputs at 5 V for ignition modules, CDI units or coils. Injector staging and per-cylinder fuel correction are supported.

Thirty general-purpose outputs

GPO 1–8 at 2 A, GPO 9 and 10 at 5 A, GPO 11–14 at 2 A, GPO 15–23 as 12 V sourcing at 4 A, and GPO 23–30 at 1.5 A. In practice this means you rarely need external relays for anything the ECU should be controlling.

Twelve EGT inputs

TYPE-K and TYPE-N thermocouples to 1200 °C / 2200 °F on a separate harness, sampled at 50 Hz. Feeds EGT fuel correction and EGT power cut. Twelve channels covers a V12 or gives you redundancy on a V8.

Dual wideband lambda and dual E-Throttle

Two Bosch LSU 4.2/4.9 sensors wired directly to the ECU — per-bank lambda without external controllers. Two independent electronic throttle bodies driven natively. The PREMIUM kit ships with two LSU 4.2 sensors and two connectors.

Knock control on a dedicated processor

Two knock sensor inputs, processed independently. PRO uses an ARM Cortex-M3 120 MHz main processor plus three extra processors handling triggers, injectors and EGT.

Built-in 8 G accelerometer

Longitudinal and lateral G recorded alongside engine data — the basis for real launch analysis and traction strategies.

Waterproofed case with shock absorbers

Aluminium enclosure, waterproofed, mounted on shock absorbers. Built for a car that vibrates hard.

Massive input count

16 × 0–5 V analog inputs sampling at up to 1000 Hz, 10 digital inputs (4 VR-capable, suiting four wheel speed sensors), 6 temperature sensors, 2 trigger inputs on a separate processor, plus dedicated IAT, CLT and TPS.

MaxxECU PRO full specifications

Should you upgrade or downgrade?

Upgrade to GEN2 RACE if…

You want the current-generation platform. MaxxECU GEN2 RACE matches PRO's 12 sequential cylinders and 16 injector outputs, and beats it on nearly everything else:

• IP68 sealing and Superseal 1.0 connectors versus a waterproofed case
• WiFi tuning straight to MTune
• 550 kPa MAP sensor (4.5 bar / 65 PSI) versus PRO's 400 kPa (3 bar)
• Bosch LSU 5.2 support for ultra-rich methanol mixtures
• 16 GB logging of all 2000+ channels versus 8 MB
• EGT at 200 Hz versus 50 Hz
• ARM dual-core at 3000 calculations/second versus 2000
• Lua scripting, 8× larger tables, and every I/O protected against reverse polarity, overvoltage and short circuit
• 700 g versus 1137 g

What PRO keeps: 12 EGT inputs versus 8, 30 GP outputs, 22 analog inputs and 10 digital inputs. If sheer channel count is the constraint, PRO still has an argument. Existing PRO tunes are compatible with GEN2.

Downgrade to GEN2 TRACK if…

You have 8 cylinders or fewer and do not need native thermocouple EGT inputs. MaxxECU GEN2 TRACK gives you the entire GEN2 feature set — IP68, WiFi, dual lambda with LSU 5.2, dual knock, 550 kPa MAP, dual CAN, Lua, 8 GB logging — for considerably less than a PRO. For most V8 builds this is a better ECU than a PRO despite being lower in the range.

Downgrade to RACE if…

Eight sequential cylinders is enough and you do not need 30 outputs. MaxxECU RACE keeps knock control, 8 EGT inputs, dual E-Throttle capability and Bluetooth on the same GEN1 platform at 880 g, with a waterproof H2O option.

Downgrade to SPORT if…

You are on 6 cylinders and do not need knock or EGT. MaxxECU SPORT is a large step down in channel count but keeps E-Throttle, Bluetooth, peak-and-hold drivers and a built-in wideband.

What to buy alongside a MaxxECU PRO

• MaxxECU PDM20 — even with 30 outputs on the ECU, a PRO-level car benefits from proper power distribution. The PDM20 replaces fuses and relays with 20 programmable, PWM-capable, current-monitored outputs handling up to 230 A, with CAN keypad support and an energy-saving mode drawing 0.004 A. It configures from MTune over CAN.
• MaxxECU Expansion Module — adds 12 analog inputs, 4 pulse inputs, 4 × 12 V outputs and 4 H-bridges over CAN. Note the GEN1 limit of one module with pre-defined configuration and a 2 ms update rate.
• Harness 2 and 3 — the PRO STANDARD package includes harness 1 only. EGT and secondary wideband functions live on the additional harnesses. PRO PREMIUM includes all harnesses plus two LSU 4.2 sensors and connectors.
• Twelve TYPE-K thermocouples and bungs — to use the full EGT capability.
• Two knock sensors and two LSU sensors.
• Terminated engine harness — 2JZ, BMW M50, Volvo T5, GM LS.

Frequently asked questions

What is the difference between MaxxECU PRO and GEN2 RACE?

Both run 12 sequential cylinders and 16 injectors. GEN2 RACE is the newer platform with IP68, WiFi, LSU 5.2 support, a 550 kPa MAP sensor, 16 GB full-channel logging, EGT at 200 Hz, a dual-core CPU, Lua scripting, protected I/O and 700 g weight. PRO has more channels: 12 EGT inputs versus 8, 30 GP outputs, 22 analog inputs and 10 digital inputs.

Is MaxxECU PRO still the best MaxxECU?

It is the widest GEN1 unit and still has the highest EGT channel count in the range, but GEN2 RACE is the current flagship on platform capability. Choose PRO for channel count on a proven platform; choose GEN2 RACE for the newer hardware.

How many EGT sensors can a MaxxECU PRO use?

Twelve, TYPE-K or TYPE-N, to 1200 °C, on a separate harness, sampled at 50 Hz.

Does MaxxECU PRO support dual drive-by-wire throttle bodies?

Yes. Dual E-Throttle is supported as standard.

Does MaxxECU PRO have two CAN buses?

Yes — dual CAN, so gearbox control, expansion modules, OEM vehicle CAN and OBDII can be separated across two networks.

What drag racing features does MaxxECU PRO have?

Three-stage launch control, rolling launch, after-launch power limiting for traction management, multi-stage nitrous with staged control, shift-cut, sequential gearbox control, timers and distance counters, and a built-in 8 G accelerometer for launch analysis.

Where can I buy a MaxxECU PRO in the Baltics?

Rocket Speed Shop is the official MaxxECU distributor for Estonia, Latvia and Lithuania.

Explore the rest of the MaxxECU range

MINI · STREET · SPORT · RACE · GEN2 TRACK · GEN2 RACE · PDM20 · Expansion Module.

Shop MaxxECU PRO at Rocket Speed Shop →