Performance Racing Technology
Innovation fosters ideas like creating the automobile instead of a faster horse. Innovators are exceptional visionaries who implement their talents to their visions. In racing, we can argue the merits of innovating with customer feedback, but "more power" is the answer most race drivers would give when asked how they want to go faster. Garmin's novel racecar, Driver Data Acquisition system, requires shifting the brain gears. It is so different from other DA systems that it stands in a class of its own. It instructs you, the driver, how to drive most effectively. It tells you instantly with spoken prompts on the track where and when to adjust your driving without downloading to a laptop or leaving you to interpret the data without feedback.
There are two types of heat exchangers for automotive and truck use. The air to air type and the water to air. In the first variant, the intake air runs through the heat exchanger where it is cooled by the air that flows through it. In the second alternative, a dedicated pump forces water through the heat exchanger where the water is cooled by the air flowing through the grill opening or the depression created by the fans when a heat exchanger is used. The pump forces the water into the core under the supercharger through which the intake air is cooled.
NASCAR and FORMULA 1 ROD STROKE RATIO & PISTON SPEED
At 18000 RPM Formula One engines with an RSR of 2.56 achieve peak piston speeds of over 7000 feet-per-minute (FPM). A NASCAR Cup engine piston speed reaches 8800 FPM at 10000 RPM with an RSR of 1.91.The F1 numbers are due mainly to the engines’ short strokes.
It is pointless to address the length of the connecting rod in any engine, racing or otherwise, without looking into the ratio of the length of the rod to the length of the stroke of the crankshaft. This rod stroke ratio (RSR) is calculated by dividing the rod length by the stroke value. What is more, the piston pin location in the piston also affects the result of the calculations. Moving the pin closer to the thrust side causes the piston to acquire shorter rod characteristics. Conversely, when the pin is moved toward the non-thrust side of the bore makes the rod act longer.
Using the rod/stroke calculator and piston pin location calculator along with a modern advanced personal computer based engine development software unlocks a plethora of ideas and results that can be used to improve performance, increase BMEP, torque, power endurance and reliability.
The rod to stroke ratio affects the angle at which the connecting rod applies force to the piston. A shorter rod will create more pressure on the piston skirts but it will have a smoother acceleration and deceleration curve at TDC and BDC.
At piston speeds above 5000 FPM, pistons must be equipped with forced pin oiling slots to cool the pins, the rings, and the pistons. This load increases at the square of the speed, and at higher speeds the rings, pistons, and pins receive less lubrication from the spinning crankshaft. Reduced oiling can result in overheated piston tops and skirts as well as the rings and pins.
OEMs (Original Equipment Manufacturers) manufacture their oil coolers, for transmissions or engines, for "normal" driving and under "normal" conditions.
As soon as an engine crosses its threshold of power, the lubricants overheat, and they must return to a safe temperature! Avoid expensive damage to your hard-earned high performance engines and drivetrain components with the best automotive oil coolers for engines, transmissions, gearboxes, transaxles, differentials, and power steering units.