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The 8-6-4 is a big block Cadillac motor with 6.0 liters based on a proven platform that has set high mileage and reliability records. The 8-6-4 has been known to turn odometers well past 500K miles with no major failures. The HT4100 is a tiny aluminum block 4.1 liter motor with cast iron heads (really??)
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The GM L62 V-8-6-4. Photo courtesy GM Media Archive. Though the ill-fated L62 engine lasted just a single production year, the range of 1981 Cadillac passenger car models foretold the future of modern variable-displacement V-8 and V-6 engines, as well as the future of onboard vehicle diagnostics.
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Cadillac's V8-6-4 engine of 1981: It seemed like a good idea at the time Cylinder deactivation works great now. In 1981, there were some problems. By Murilee Martin Published: Apr 28, 2015
Cadillac STS 4.6 i V8 32V VVT AWD (325 Hp)
Cadillac made the V8-6-4 because gas prices were becoming expensive. So GM came up with cylinder-deactivation methods. The methods allowed V-8 engines to occasionally cruise on four cylinders and save a couple of miles per gallon. All the Cadillac models in 1981 came with the V8-6-4.
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Coming out of the second fuel crisis inside of a decade, Cadillac's standard-for-1981 V8-6-4 system was designed to shut off either two or four cylinders to increase fuel mileage out of the 368-cu.in. Cadillac V-8. The engine itself was a destroked, smaller-bore version of the old 472/500 that had powered Cadillac through the first fuel crisis.
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This is about Cadillac's revolutionary, impossibly disastrous 4-6-8 cylinder deactivation engine from 1981. It's also about thinking beyond technological limits without respecting those technological limits. Was GM ready for an engine that could switch from 4- to 6- and then 8- cylinders? 1981 Cadillac 4-6-8 L62 engine | GM
Cadillac Seville STS 4.6 V8 32v low millage in Aberdeen Gumtree
The V8-6-4 was the standard engine in all 1981 Cadillacs (except for the Seville, which had the troubled Oldsmobile diesel engine as the base powerplant and the V8-6-4 as an option). Unfortunately.
Cadillac Has No Current Plans for the Blackwing V8 AutoMoto Tale
Back in 1981, Cadillac shocked the automotive world with one of the most innovative engines of this era which was called the V8-6-4. Cadillac with its techno.
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Dead-End Technologies: Cadillac Fleetwood V8-6-4 May. 08, 2013 2:00 PM ET by Jacob Joseph Classic Cars / 72 Comments Although the effort was made, the computing technology needed for.
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The V8-6-4 was a $325 credit option in the Seville (bottom) which came standard with a diesel engine. Cadillac (General Motors, really) enlisted the assistance of industry supplier Eaton to develop the valve gear necessary to facilitate the action of shutting down cylinders on demand.
What Was the Cadillac V864? The Daily Drive Consumer Guide® The
The Eaton-designed, throttle body-dependent fuel management system on the 6.0L mill was intended to cut out either two or four cylinders, depending on how much load it was under, hence the name 8-6-4—and promised a 30-percent improvement in fuel mileage compared to older drivetrains.
81 Cadillac Eldorado Biarritz • 368cui V864 • 79k Miles • Sunroof
The V8-6-4 was rated at 140 horsepower in 1981, which gave the 4,069-pound Fleetwood Brougham Coupe a power-to-weight ratio just slightly better than that of the Chevrolet Chevette Scooter (and.
Fuel Crisis Fleetwood 1981's Cadillac V864 Old Motors
This was the V8-6-4 engine, a 368-cubic-inch V8 that used computer-controlled solenoids to disable the rocker arms of two or four cylinders under low-load cruising conditions. It sounded.
81 Cadillac Eldorado Biarritz • 368cui V864 • 79k Miles • Sunroof
The V-8-6-4 system was designed to shut off either two or four cylinders to increase fuel mileage; this was determined by Cadillac's on-board Computer Command Module, which used sensors to monitor engine speed, EGR, idle speed, intake manifold air pressure, coolant temp, air pump operation and exhaust, and adjusted the air-fuel mixture accordingly.
1981 Cadillac V864 in the AACA Hershey Car Corral Mind Over Motor
The term Cadillac V8 may refer to any of a number of V8 engines produced by the Cadillac Division of General Motors since it pioneered the first such mass-produced engine in 1914. [1] Most commonly, such a reference is to one of the manufacturer's most successful, best known, or longest-lived 90° V8 engine series.
Amazing original Garage Kept 1981 Cadillac Deville 6L 368 V8 Automatic
Cadillac quickly shelved the flawed V8-6-4 and pulled forward the under-developed, under-powered, unreliable and utterly underwhelming "High Technology" 4100 aluminum V8 for use in its big cars in 1982. Proof that things could indeed go from bad to worse for Cadillac, and those repeat customers lucky enough to miss a dismal V8-6-4 1981.