Tup4n

I agree with your points. However, as far as I concerned, 42172 was not originally designed for high speed also)) However it turns to be very robust and managed to deal with all challenges. Sure every Lego super car 1:8 will be heavily damaged if you crash it the wall or etc… Regarding this car, small system bricks can be a problem, but I believe I can modify the body/chassis to be more robust. I mean, I have to change the half of the chassis anyway to put all electronic components and the large battery

They will not fall of, because I am using custom 3D printed wheel hubs with bolts. I have already motorised McLaren 42172 and Cada AMG ONE and reached 40 km/h. Faster, then the BuWizz

@T Lego sorry to bother you, dude, but I have some plans to motorise this set with the brushless RC set up and to achieve some decent speed. In this regard, before I buy the set from the Cada, I have some technical questions. 1) do you know exact weight of the car? I saw you wrote it is around 3 kg. The car has 1000+ more parts than a Lego Daytona and Sian. So, can you confirm that it has the weight similar to these cars, or it is heavier? 2) can I use the rims from the Bugatti/Sian, or they will not work? I saw, that in your early prototypes you used rims from the Sian to build the chassis. thanks in advance!

Thank you! I have some plans on motorization of 42115 in the future. Since it is all-wheel drive car, it sounds like a new challenge! Sadly, I dont have a lot of photos of the motorization, since i completed the build quite fast. But i can share all that i have. This is how the motor is attached to the chasis. Rear axle with 1) RC differentinal, 2) 2 geek servos for spoiler and fake engine, 3) main pair of 12:20 gears Custom wheel hubs and positive caster angle (must have! It is impossible to drive the car with out these options) I have to reinforce the rear suspension, as the weight of the car's back increased sugnificantly due to the battery and the motor. With the single spring on each side, it just stopped working. Overall look of the engine bay

Hey! Yes, the motor tends to overheat extremely fast. You should use the cooler fan in order to keep the motor safe. In the beginning I have experienced the overheating just after 5 minutes of driving. Now I can play with the car around 20-30 minutes (until the low battery) with out any problems and the motor stays cold. I will recommend Surpass Hobby Rocket RC cooler fun - it’s cheap, has high rpm and does the job. I can definitely say that you just can’t use the motor on such a heavy Lego cars (3kg) with out cooling system. About reduction gears. The motor from the Zene has a build-in 4x planetary reduction. I am using additional 12:20 reduction gear ratio just for more torque and to reduce additional stress for the motor. I have tested my Cada Mercedes AMG ONE with gear ratio of 16:16 for more speed, but in this case at 30+ C outdoors the motor temperature was too close to the limits. That’s why I ended up with this setup - strong cooler fun and 12:20 gear ratio. It’s reliable and fast enough.

Agree! They look realistic and stunning, and in the same time, provide a challenge for the builders to make them fast. I spent 4 mounts on my previous project with motorization 1:8 super car with the brushless system, and there were so much issues/problems and bug fixings, until I managed to find a working solution for the drivetrain/motor cooling and the suspension. After that, motorizing this McLaren was as easy task.

Hello! I have motorized the original Lego set 42172 with the brushless system using mostly custom parts from Zene bricks. It took me 2-3 weeks to finish this project, since all technical solutions and parts have been tested on my previos 1:8 supercar - CADA AMG ONE. I managed to reach the top speed of 40.8 km/h on this set up using 12:20 gear ratio in the drive train. Since Mclaren P1 a little bit heavier then CADA AMG ONE (+400 g.) i expect only around 32-35 km/h. Here is the specs: 1) The motor - Surpass Hobby 2445 50000 rpm (3600 kV) 2) Cooling system - Surpass Hobby Rocket RC 20000 rpm 3) 3 geek servo motors for steering, fake engine and spoiler mechanism 4) The batttery - 11.1V 1800mah 5) RC differentinal, metal universal joints, metal shafts, ball bearings and etc. 6) Gear ratio from the motor - 12:20 6) Custom wheel hubs 7) Car weight - 3,7 kg (with the battery on board) 8) Expectation top speed - around 32-35 km/h I have attached some video footage. All in all, i have so much fun driving this car. Hope you like it!