Enthusiasts Throwback Thursday 1962: the Oldsmobile Jetfire explained
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The turbocharger is so ubiquitous now that even those with no interest in cars to speak of will have at least heard of it.
That's probably partly because these devices are fitted to all manner of engines these days, fromright up to , and partly because the word 'turbo' essentially came to mean anything powerful and cool during the 1970s.
Yet this technology has not been in the mainstream for very long. In fact, while the turbocharger was invented way back in 1905 and used on American aircraft during World War II, its first automotive application did not come until 1962.
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<p>Bill is rightfully proud of his custom 1957 Olds, and we believe that Harley Earl and R.E. Olds—if they were around to see it—would be honored by the tribute.</p>Bill was 13 when he tried to persuade his father to buy a particular 1957 Olds 98 four-door. "I didn't understand that the car cost about what my steel mill worker dad made in a year," he says. A few years ago, while paging through the car classifieds, Bill came across this one. "I was shocked to see a photo of what looked like the car that sent me begging my old man to buy. The next day I was dragging a trailer behind my truck headed for Florida.
Turbos appeared on a pair of General Motors (GM) models: first theCorvair Monza and, just weeks after, the Jetfire. These were not the first forced-induction cars, however; cars including the Graham eight-cylinder (1934), Cord 812 (1937) and Golden Hawk (1957) had already employed superchargers.
On 27 April 1967, Autocar's JP Norbye explained how the Jetfire's newfangled device worked.
"By adding the turbocharger to the [3.5-litre, aluminium-block] V8 engine, the Oldsmobile engineers have won a 40% power increase in the mid-speed range," he wrote. Indeed, the turbocharged engine made 215bhp, affording a 0-60mph time of less than 9.0sec. And, amazingly, this was done "without affecting engine flexibility, durability or fuel economy".
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"These results could not have been obtained by increasing the cubic capacity of the engine or installing a larger, existing unit. Tuning of the basic V8 by raising the compression ratio, installing larger carburettors, revising the porting and modifying the camshaft would lead to a top-end power gain, but a loss of flexibility and an increase in fuel consumption".
The turbocharger was supplied by Garrett AiResearch, an innovative aerospace company whose products included intercoolers, turbines, cabin pressurization systems and early flight computers, and whose later feats included involvement with the first turbo car to , first turbo car and first production turbodiesel car (the US-market-only 300SD of 1978).
1,000-HP Equus Throwback Is A Corvette With Gigantic Exhaust Tips
The design blends cues from multiple Corvette generations into one vehicle. Research chevrolet corvette See All Model Years See Pricing Equus Automotive, not to be confused with the Hyundai sedan, aims to be the American equivalent of European aftermarket specialists like Brabus or Alpina, and the firm's latest creation is the Throwback. The custom coupe is a love letter to classic Corvettes with a modern twist. Prices for the Throwback start at $130,000, and the firm only intends to make 25 of them.© Motor1.com 2013 Equus Bass 770 26.09.
The idea for using a turbocharger had come from GM's chief engine development engineer, Gil Burrell, who had recalled an extensive technical report on the subject that the company had made "many years before" and decided to enthusiastically continue the research, which led to him contacting Garrett.
The mechanism that resulted was described by Autocar as "extremely elaborate, with numerous safety devices".
We said: "Those who are familiar with turbocharged diesel engines [these had already long been used in locomotives and trucks] may be surprised that it should be necessary to complicate the machinery so much merely because the impeller sucks through a carburettor and not from a pure air intake."
"But a little thought will make it clear that blower pressure has to be limited. The high volumetric compression ration of 10.25:1 also makes it necessary to inject a water-alcohol mixture, and the carburettor is coupled to a metering device, with connections to a bypass should the fluid reservoir run dry."
Rare Find: 1970 Oldsmobile Cutlass S W-31 Hides in Original Owner’s Garage for 34 Years
"I was shocked when I saw it," Jimmy McKeague said. The "it" was a 1970 Oldsmobile Cutlass S Holiday Coupe with the W-31 option. Research oldsmobile cutlass See All Model Years A W-31 is not the same as a big-block W-30, but it's still a real W-Machine with a fiberglass hood with functional ram air feeding a 325hp 350 purposely built by Oldsmobile for enthusiasts. These cars are very rare and attract owners with erudite knowledge of Oldsmobile muscle. Dabblers or flippers in the muscle car hobby would likely mistake the unique W-31 350 as a common GM V-8 fitted with a four-barrel.
That mixture, comically christened 'Turbo Rocket Fluid' consisted of 50% methyl alcohol and 50% distilled water and a small amount of anti-corrosion additives. It served to prevent detonation because early prototypes of the engines suffered from spark knock. The alcohol "served as an anti-freeze, making it possible to use the same fluid regardless of temperatures" and was injected between the carburettor and the compressor.
We explained further: "The nozzle is located in a part of the passage that forms a long venturi to obtain the desired pressure drop; the ratio of fuel to fluid remains close to 10:1 throughout the engine's rpm range."
Of course, in a naturally aspirated engine, this drop is created when a cylinder falls during the intake stroke, whereas turbo tech allows air to be sent into the engine at a pressure above atmospheric ('boost' pressure).
"Under cruising or coasting conditions, with the throttle partly open, there is a high vacuum in the intake manifold, so there is a check valve in the metering system to prevent fluid from being sucked into the engine at low or nil boost pressure. When the boost pressure in the manifold reaches 1psi, a diaphragm in the fluid metering valve opens a ball check valve, and the pressure in the fluid container tank forces the fluid through a jet to the injection nozzle."
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New York City's Central Park will kick out cars this summer after more than a century.The move, which aims to cut down on traffic accidents and air pollution in the most-visited urban park in the United States, takes effect on June 27, the mayor told reporters.
Oldsmobile's V8 consumed this fluid at a rate of around 8000mpg, but the reservoir was a mere 4.7-litres, meaning it could be emptied in less than 250 miles. When it was empty, performance would drop significantly (although it was still perfectly okay to drive the car), leading to many owners who had not refilled the reservoir taking the car back to the dealerships and complaining.
Given the system's complexity, it was natural that some cars suffered mechanical issues, too, and all this lead to Oldsmobile offering to replace the complicated turbocharger mechanism with a conventional 4-barrel carburettor. This means it's now nearly impossible to find an 'original' Jetfire because just 9607 examples were produced and most owners took up the offer of a replacement.
The Jetfire's turbocharger was "fitted across the top of the engine, with the turbine and compressor mounted on a single shaft". It was smaller than the Corvair's, with a compression diameter of 2.5in (to 2.4in). Its speed range was from 6000 to 90,000rpm; at a crankshaft speed of 14,000rpm, the turbocharger's pressure was just 14.7psi.
Our report said: "Maximum efficiency is designed to come in between 2000 and 2200rpm, but boost remains high up to 5000rpm. Maximum power is developed at 4600rpm, as against 4800rpm for unblown versions of the V8.
Kenseth to pay tribute to Martin in All-Star Race
The throwback paint scheme will signify team owner Jack Roush's first victory in the event.The No. 6 Ford will sport the iconic black, red, orange and yellow livery that Martin drove to the win that year.
"In normal driving, the turbine will cruise at 40,000rpm. For maximum acceleration, the throttle is opened wide, and the turbocharger has a remarkably quick response, accelerating to about 80,000rpm in less than a second."
The most amazing part of all this, Autocar's man considered, was that "the turbocharger is absolutely silent and free of vibration, not only at normal speeds but also when accelerating, reaching maximum and when idling."
While a valiant effort, neither of GM's turbocharged pioneers became trendsetters, with the first truly successful turbocharged cars didn't come until the early 1970s, in the form of the, and – although sadly sans Turbo Rocket Fluid.
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Badges and Hood Ornaments from the Fallbrook Car Show .
Tucked away in Socal wine country, otherwise known as Temecula, is the town of Fallbrook. Every year they have a local car show on the golf course that draws a wide variety of cars from many decades and regions of the world. Domestic muscle cars, pre-war hot rods, classic European sedans and sports cars, horseless carriages, and little bit of Japan in rare, untouched form can be found. Gone is the era of extensive artistic endeavor from everyday vehicles. Body lines, wheels, glass, radio knobs, everything on vintage cars was ornate and thoughtfully designed. Hood ornaments and badges were a calling card of sorts that gave the car identity in a sea of metal.
Throwback Thursday 1962: the Oldsmobile Jetfire explained
Throwback Thursday 1962: the Oldsmobile Jetfire explained ➤ Subscribe Now: https://goo.gl/9AJN1y The Oldsmobile Jetfire missed out on being the first turbocharged production car by mere...
Throwback Thursday 1962: the Oldsmobile Jetfire explained
Throwback Thursday 1962: the Oldsmobile Jetfire explained The turbocharger is so ubiquitous now that even those with no interest in cars to speak of will have at least heard of it. **************...
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