Entry № 041-6 / V-86 · 0:00 synced

I ATTEMPTED TO REBUILD A 720S THAT MCLAREN WON'T | PT3

Mat Armstrong@MatArmstrongbmx3.3M viewsOct 24, 202328:56
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Description

For a chance win £100 worth of YFood Enter here - bit.ly Can’t wait? Try yfood now: bit.ly I bought a wrecked Mclaren 720s which had severe damage to the carbon fibre tub. Mclaren told us they were unable to fix it so our only option was to buy a whole new tub and rebuild the Mclaren from scratch.

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The video follows Mat Armstrong and his father as they tackle a high-stakes rebuild of a wrecked McLaren 720S. Early on, the team explains that McLaren deemed the carbon tub too damaged to repair, making a full tub replacement necessary. The first segment centers on quickly reassembling key components onto the new tub, including the fuel tank, engine, and transmission, while navigating tight clearances and the complex routing of hoses and wires. Throughout, serious attention is given to aligning the drivetrain with the car’s carbon structure and plotting how to adapt to a left-hand drive tub while the donor is right-hand drive. The narrative emphasizes the challenge of grafting necessary parts from one tub to another, including manual modifications and careful bonding to keep the carbon structure intact. The team strategically prioritizes essential connections first, like fuel, air intake, exhaust, radiators, and the electrical loom, to create a testable baseline that allows progress to continue with confidence. As the project advances, they address critical fitment issues, such as the brake servo, dash mounting, steering rack, and the front subframe, while balancing safety concerns and the risk of misplacing a bolt in a high-stakes rebuild.

Topics · car restoration · DIY · automotive engineering · family/mentorship · car rebuild series · vlog

Questions answered

What was McLaren's assessment of the tub damage and the plan to move forward?
McLaren deemed the carbon tub unrecoverable and the rebuild required installing a completely new tub and transferring components.
What major challenge is highlighted when integrating the left-hand drive components into a right-hand drive tub?
The left-hand drive tub holes and mounting points must be modified to fit the right-hand drive layout, including the brake and steering components, which may require drilling and bonding work.
Why is the brake servo and dash mounting a critical focus in the build sequence?
The brake servo and dash mounting are essential for structural alignment and for providing a proper mounting surface for the steering rack and pedals, impacting the ability to safely start and drive the car.
What safety concern repeatedly appears in viewer feedback and how is it addressed in the video?
There is concern about carbon fibre dust inhalation; viewers urge respirators and water cooling while cutting carbon, which the creators acknowledge and emphasize safety practices.