Supercharger SC14 Specificationsby Tim McQuade
Toyota produced the SC14 supercharger in the mid- to late 1980s and featured it as a factory option on its sporty, high-performance Supra. Due to the SC14's ability to work with different engines, car enthusiasts utilize this supercharger as an aftermarket performance option in their vehicles.
Toyota put the SC14 supercharger on its 1G-GZE engine from 1985 through 1989. During that time span, the supercharger was available as a factory-installed option. Toyota also released the SC12 supercharger in its 4A-GZE engine around the same time period as the SC14. The SC12 and SC14 were similar superchargers, except the SC14 was slightly larger, the SC14 had a higher displacement than the SC12 and, unlike the SC12, the SC14's engine (1G-GZE) did not have an intercooler. The 1G-GZE was an in-line six-cylinder, 2.0-liter engine.
The SC14 could create boost spinning in either direction --- the inlet became the outlet if needed. This supercharger featured a roots-type positive displacement design and fluorine-resin coated rotors. Toyota designed the SC14 so users could wire the supercharger to their control panel and turn it on or off with the push of a button. The SC14's relatively simple design decreased maintenance needs and increased lifespan. Also, Toyota designed the SC14 without an oil dipstick, and instead used an oil-level inspection/filler plug.
The SC14 displaced 1,420 cc per revolution, compared with the SC12's 1,200cc displacement. It helped the 1G-GZE engine produce an approximate peak power output of 170 horsepower. Toyota designed the SC14 to rotate at 1.25 times the speed of the crank, as well as produce boost at lower engine rpm. However, the SC14 featured subpar thermal efficiency. Also, the 1G-GZE redlined at 7,500 rpm.
Toyota's SC14 measured 12.0 inches in length, 5.8 inches in width and 10.0 inches in height, and weighed 26.2 lbs. The outlet pipe on both superchargers measured 2.24 inches in diameter. Comparatively, the SC12 measured 2.4 inches shorter in length and weighed 2.4 lbs. less than the SC14. Because of this, the SC14's larger size made it difficult to install in a smaller engine bay.