What It Takes: Turning A Hatchback Into A Race Car

We’ve spoken a lot about building race cars here at Hackaday, but what does it actually look like to go out and do it? The boys from [Bad Obsession Motorsport] dived into that very question with their Bargain Racement series last year.

The CityCar Cup championship aims to keep entry costs low and racing competitive by racing cheap hatchbacks with a strict ruleset. Credit: Nankang Tyre CityCar Cup

The series follows the duo as they build a Citroen C1 into a competitive race car to take on the City Car Cup, an entry-level racing series focused on keeping the field competitive and the racing close.

Even at this level, there’s plenty to do to prep the car for competition. The rollcage needs to be installed, seats changed out for race-spec gear, and plenty of wiring to do as well. [Nik] and [Richard] have plenty of experience in the field of motorsport, and shine a great light on how to do the job, and do it right.

All in all, building the car cost £5995 pounds, starting from a used £850 Citroen C1. However, actually going racing costs more than that. Between race suits and boots, a helmet, club memberships and race entry fees, it cost a full £8273 to get to the first race. It’s steep, though much of those costs are upfront. Keep the car off the walls and year on year, you only need to keep paying for entry fees, memberships and consumables like fuel and tires.

It’s a great look at everything from building a race car, to testing and then actually competing as well. It serves as an excellent real-world example of what we talk about in our series on how to get into cars, which just recently touched on prepping a car for endurance competition. Video after the break.

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Custom Ignition For A Citroën Mehari

The 20th century saw a great many cheap, utilitarian vehicles enter the marketplace. Cars like the Mini and the original Jeep offered low-cost, no-frills motoring. However, they were also decidedly low-tech, and not as reliable as modern cars by a long shot. The Citroën Mehari fits into this category neatly, and when [FVFILIPPETTI] grew tired of the unreliable points ignition system, he decided to build a more modern replacement.

The system is based around at ATmega328, the venerable chip many are familiar with from its starring role in the Arduino Uno. The chip tracks engine position with a magnet mounted on the flywheel combined with a hall-effect sensor, passed through an optocoupler to avoid nasty high-voltage spikes from the spark system interfering with the microcontroller. The chip then charges the ignition coil and fires it at the necessary time to ignite the air fuel mixture.

Old-school mechanical ignition systems were, if we’re honest, terrible compared to more modern solutions. This build has rewarded [FVFILIPPETTI] with a far more reliable ride, which we’re sure is very satisfying. If all this hacking has you thirsty for an automotive project of your own, dive into our primer on how to get into cars!

Hackaday Podcast 088: Flywheel Trebuchet, Thieving Magpies, Hero Engines, And Hypermiling

Hackaday editors Elliot Williams and Mike Szczys riff on the hardware hacks that took the Internet by storm this week. Machining siege weapons out of aluminum? If they can throw a tennis ball at 180 mph, yes please! Welding aficionados will love to see the Hero Engine come together. We dive into the high-efficiency game of hypermiling, and spin up the polarizing topic of the Sun Cycle. The episode wouldn’t be complete without hearing what the game of Go sounds like as a loop sequencer, and how a variable speed cassette player can be abused for the benefit of MIDI lovers the world over.

Take a look at the links below if you want to follow along, and as always, tell us what you think about this episode in the comments!

Take a look at the links below if you want to follow along, and as always, tell us what you think about this episode in the comments!

Direct download (60 MB or so.)

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Hackaday Podcast 058: Motorheads, 3D Prints That Bend Metal, And Homebuilt Onewheel Deathmachines

Hackaday editor Elliot Williams and contributor Jonathan Bennett discuss the past week of Hackaday. Freeman Dyson, who wanted to send us to space on the back of nuclear explosions, passed away. Only slightly less dangerous, we looked at self-balancing vehicles, 3D printed press brakes, and making rubies in the home lab. All the usual suspects make cameo appearances: robots, FPGAs, and open-source software.

Take a look at the links below if you want to follow along, and as always tell us what you think about this episode in the comments!

Take a look at the links below if you want to follow along, and as always, tell us what you think about this episode in the comments!

Direct download (60 MB or so.)

Continue reading “Hackaday Podcast 058: Motorheads, 3D Prints That Bend Metal, And Homebuilt Onewheel Deathmachines”