Reviving a 4-Engine, 4WD Go-Kart for Backyard Hillclimb and Ice Race

The "Contraption Death Trap" Go-Kart

• 💡 The video revisits a 4-engine, 4WD go-kart built nearly five years prior, described as a "contraption death trap" due to its sketchy design, with engines at head height and exhaust blowing into the driver's face.
• ⚠️ Despite its hazardous nature, the team decides to revive it for an upcoming backyard hillclimb and potential use in muddy or icy conditions.

Initial Revival and Challenges

• 🛠️ The go-kart is found with a missing tire and three flat tires, weighing around 700 lbs, necessitating a difficult move to the shop using a four-wheel-drive vehicle.
• ⚙️ Upon inspection, the kart features a unique engineering setup with four 212cc engines, a Volkswagen steering rack, and a complex chain-drive system to each wheel.
• 💨 Initial attempts to start the engines reveal issues, with one not idling and others requiring an "Italian tuneup" (running them hard) to function.

Tire Replacement and Engine Upgrades

• 📦 New wheels and tires are sourced from Go Power Sports, featuring a mix of aggressive cleat tires on the front and slicks on the rear for "all-terrain" capability.
• 🔧 The team installs the new tires, requiring disassembly of the front end and dealing with a bent spindle brace and a difficult-to-access master link.
• ⛽ Old fuel is drained and replaced, revealing significant degradation in three of the four fuel tanks, with one tank's interior looking severely corroded.
• 🚀 For performance upgrades, Stage 1 kits are installed on two engines, including rejetting carburetors for freer exhaust and intake, and bypassing the governor to increase RPMs.

Performance and Testing

• ⚡ The go-kart, even on three engines, proves to be incredibly fast in a straight line, described as an "absolute rocket ship," but is highly uncontrollable with poor steering.
• 💥 During testing, the kart experiences chain issues, a destroyed belt, and a bent chassis, highlighting the extreme forces involved.
• 🥶 The team then takes the kart to an icy pond for an "ice climb" challenge, where its lack of effective brakes and uncontrollable steering make for a chaotic but entertaining event.
• 🏆 Despite challenges, the 4-engine go-kart performs surprisingly well on the ice, outperforming a standard four-wheel-drive vehicle in the race, though brake issues remain a significant concern.

Future Modifications and Conclusion

• 💨 Planned future modifications include fitting custom headers to redirect exhaust fumes away from the driver, further carburetor tuning, and addressing the steering and braking systems.
• ✅ The team concludes that while the kart is a "rocket ship" in a straight line, it requires significant work to become truly controllable and safe for future events like the hill climb.