Muffler — a not simple device

Homemade car muffler: triangular prism design

Interest in homemade mufflers is driven primarily by the unsatisfactory quality of series products. It is quite natural for an amateur designer to want to improve the parameters of their vehicle. Of course, it is practically impossible to significantly increase engine power through a muffler at a given exhaust noise level, but eliminating some shortcomings Read more…

Motorcycle essentials

Motorcycle upgrades: carburetor, tank and luggage box

At first glance, these are just trifles that mean nothing. In fact, much in our lives (if not everything) is decided by them — though in different ways, depending on what kind of trifles they are. Some, for example, may affect no more than a person’s mood, while others can even change the fate of Read more…

“Bulb” instead of lungs

Mini pump for safe fuel transfer in field conditions

To refuel a car tank in field conditions — for example, from a barrel or another vehicle’s tank — drivers often use a simple hose and the so-called “suction method,” creating a vacuum by mouth, which risks getting some gasoline into it. You can avoid trouble if you make a simple mini-pump. To do this, Read more…

Car lift in the garage

DIY ceiling garage hoist crane: boom, winch, trolley

When I bought a used passenger car and started repairing it, my first helper in the garage became… a hoist I built under the ceiling. Without it I would hardly have managed, for example, such a difficult operation to do alone as replacing the engine. Figure 1 shows the hoist placement in the garage — Read more…

Comfortable renovation

Shallow garage pit for seated car repairs & edging

I suggest motorists equip themselves with a shallow inspection pit that lets you repair a car while seated. It takes far less effort and material than building any “full-depth” equivalent — and it is comfortable to work in. The mini pit has two parts: a ramp pit with a sloped end (you slide under the Read more…

Multi-purpose two-stroke

AG-2R Engine: Rotary Valve DIY Build Guide

The journal has already reported on the advantages of rotary valve gas distribution in two-stroke internal combustion engines («M-K» No. 11 for 1974 and No. 10 for 1977). Here are their advantages in brief: achieving the highest specific power and fuel economy of the engine, improving starting and simplifying the cylinder design (no intake ports Read more…