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M-Tuner v3 wireless OBD dongle for the M-Engineering McLaren M838T calibration suite

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M-Engineering M-Tuner Calibration Suite for McLaren M838T 2012-2020

Name: M-Engineering M-Tuner Calibration Suite for McLaren M838T 2012-2020
Brand: M-Engineering
SKU: MTUNER-M838T
Price: 3995.0 USD
Availability: InStock

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Vendor: M-Engineering

SKU: MTUNER-M838T

Regular price: $3,995.00
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Sale price: $3,995.00
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M-Engineering M-Tuner Calibration Suite for McLaren M838T 2012-2020

Subtotal: $3,995.00

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Overview

M-Tuner for the M838T brings M-Engineering's calibration suite to McLaren's 3.8-liter twin-turbo V8, from the MP4-12C through the 650S, 675LT and the Sports Series cars. It includes Stage 0, Stage 1 and Stage 2 calibrations, and once the ECU has been unlocked you can flash, switch and update maps at home.

Live Map Switching is included at no extra charge, with four default slots on the off-the-shelf calibrations, and original purchasers get free updates between M-Engineering's off-the-shelf stages. The same software reads and clears faults, logs data, shows live data and toggles dyno mode.

Key specs

Install method	One-time bench unlock: remove the ECU and mail it to M-Engineering HQ. After that, all flashing is done at home over OBD-II with the wireless M-Tuner v3 dongle
Published power	Calibration notes show dyno charts measured at the wheels on a DynoJet 424 Linx. No numeric claim in the product text
Default map slots	91 octane, 93 octane, 100+ octane and Valet
Calibrations included	Stage 0, Stage 1 and Stage 2
Stage 1 / Stage 2 hardware	Stage 1 is stock. Stage 2 requires aftermarket downpipes of 3 in or larger
Computer	Windows 10 or Windows 11 PC

Features

Live Map Switching
Datalogging and live data
Clear faults
Dyno mode enable and disable
Auto Start/Stop disable
Left-foot braking
Kickdown disable
Loud start

Optional Motorsport Tuning Package (choose it in the selector above): Rolling anti-lag, custom boost control, custom engine safeties and custom injector characterization.

What is included

M-Tuner v3 dongle for wireless OBD flashing
M-Engineering M838T maps (Stage 0, 1 and 2)
Live Map Switching at no extra charge
M-Engineering support
Motorsport Tuning Package, only when selected

Required and recommended parts

Stage 1: stock car.
Stage 2: aftermarket downpipes, 3 in or larger.
Stage 2+ adds ID1050X injectors, and Stage 3 adds upgraded turbochargers. Both are available as complete M-Engineering power packages.
New factory spark plugs gapped to .022 are recommended where M-Engineering's notes call for them.

Frequently asked questions

Is this a bench flash or an OBD flash?
It starts on the bench and then moves to OBD. The M838T ECU is removed once and mailed to M-Engineering HQ for a one-time unlock. Once it is back in the car, you load maps, switch stages and update calibrations yourself through the OBD-II port with the wireless M-Tuner v3 dongle and a Windows 10 or 11 PC.

How much power will I gain?
M-Engineering publishes its M838T results as wheel-horsepower dyno charts from a DynoJet 424 Linx in the calibration notes. Gains depend on the car, the stage and the fuel you run.

Which M838T cars are covered?
The suite lists the MP4-12C, 650S, 675LT, 570S, 570GT, 540C, 600LT and 620R. M-Engineering marks the 620R and 540C calibration notes as coming soon.

What does the Motorsport Tuning Package add?
Rolling anti-lag, custom boost control, custom engine safeties and custom injector characterization. It requires the suite, so it is sold here as an option.

Fitment notes

US model years are shown below. M-Engineering lists the 620R and 540C calibration notes as coming soon. The 625C was not sold in the US and is not listed.

Year	Make	Model	Chassis	Engine
2012	McLaren	MP4-12C	MonoCell	3.8L Twin-Turbo V8 (M838T)
2014	McLaren	MP4-12C	MonoCell	3.8L Twin-Turbo V8 (M838T)
2015-2016	McLaren	650S	MonoCell	3.8L Twin-Turbo V8 (M838T)
2016	McLaren	675LT	MonoCell	3.8L Twin-Turbo V8 (M838T)
2016-2020	McLaren	570S	MonoCell II	3.8L Twin-Turbo V8 (M838T)
2017-2019	McLaren	570GT	MonoCell II	3.8L Twin-Turbo V8 (M838T)
2018	McLaren	540C	MonoCell II	3.8L Twin-Turbo V8 (M838T)
2019-2020	McLaren	600LT	MonoCell II	3.8L Twin-Turbo V8 (M838T)
2020	McLaren	620R	MonoCell II	3.8L Twin-Turbo V8 (M838T)

Fitment

Year	Make	Model

Not sure? Text us your VIN and we’ll confirm.

Shipping & returns

Shipping: Orders ship via UPS, FedEx or USPS, from our facility near Los Angeles or directly from the manufacturer. Rates for many items are weight-based and shown at checkout. If you need it by a certain date, text us before you order.

Returns: Unused items in brand-new condition and original packaging can be returned within 30 days of the invoice date, with a 25% restocking fee unless otherwise specified. In some cases we can offer a lower fee with the balance as store credit. Shipping charges aren't refundable in either direction unless approved by AutoTalent.

Not returnable: special-order or custom items, and anything that has been installed, modified or altered.

Cancellations: free if the item is out of stock or we miss the ETA you agreed to. Other cancellations carry a 5% processing fee to cover card fees we can't recover. Special-order items can't be cancelled.

Damaged in transit? Report it to the carrier and to us within 48 hours, keep all packaging, and don't send anything back without our written approval.

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