1966 Oldsmobile 4-4-2: Three Carburetors, Fifty-Four Race Cars and One Short Year

Motor Trend's John Ethridge ran his June 1966 test car twice, once as Oldsmobile built it and once as a drag racer would. As delivered, the Cutlass 4-4-2 sport coupe, with the new Tri-Carb 400, a four-speed and a 3.55 axle, reached 60 mph in 7.2 seconds and covered the quarter mile in 15.16 seconds at 96.56 mph on its U.S. Royal red-line tires. Fitted with headers and slicks, the same car ran 13.8 seconds at 103 mph. The gap between those two numbers is the story of the 1966 4-4-2: a street car with a race car's options barely hidden inside it.¹

The package was only two years old. Wikipedia records that Oldsmobile answered the 1964 GTO by assigning a team led by engineer John Beltz, with Dale Smith and division chief engineer Bob Dorshimer, to beef up the Cutlass. The result was option B09, the Police Apprehender Pursuit package, with a 310-horsepower 330, and the compiled tables count 2,999 of them. For 1965 the 4-4-2 moved to a 400-cubic-inch V8 rated at 345 horsepower and production rose to 25,003. By 1966 it was an established part of the Oldsmobile catalog, and that year it gained faster options.^2,3,4

It did so inside a corporate fence. Ate Up With Motor's Hurst/Olds history records that from 1964 through 1969 General Motors capped its intermediates at 400 cubic inches and at one gross horsepower for every ten pounds of curb weight, limits Ford and Chrysler did not impose on themselves. The 1966 figures sit exactly on that line. Motor Trend listed the 4-4-2 sport coupe's curb weight at 3,600 pounds, and the most powerful 4-4-2 engine Oldsmobile advertised that year was rated at 360 horsepower. On paper, at least, the rule was already fully used.^5,1

The regular 4-4-2 was still an option package, not a model. It could be ordered on the F-85 club coupe, the F-85 DeLuxe Holiday coupe and the Cutlass sports coupe, Holiday coupe and convertible. Over-Drive's fact sheet prices the package at $152 and lists its standard engine as the 400 four-barrel at 350 horsepower and 440 lb-ft. A floor-shifted three-speed was standard, a four-speed cost about $184 in Over-Drive's figures and $182.98 for the wide-ratio box in Motor Trend's price list, and the Jetaway automatic was available. Motor Trend's car listed at $2,750 before options and $4,139.72 as tested.^6,1

The new engine option was the L69, which Wikipedia describes as three two-barrel Rochester carburetors on progressive linkage, rated at 360 horsepower. Motor Trend lists it at 5,000 rpm on 10.5:1 compression and could not obtain a torque figure. Its accessory list prices the step to 360 horsepower, including the 4-4-2 package, at $264.54. Over-Drive's table counts 2,129 L69 cars, about 8.8 percent of its 24,180 total. More than half, 1,171, were Cutlass Holiday hardtops; the rest were 383 sports coupes, 240 convertibles, 178 F-85 DeLuxe Holiday coupes and 157 F-85 club coupes.^2,1,6

Behind the L69 sat something rarer. The W-30 added an outside-air induction system, which Wikipedia describes as tubing that carried cool air from the front of the car to the carburetors, along with a hotter camshaft. Over-Drive's table counts 54 factory W-30 cars and its fact sheet says they went to sponsored racers. Their distribution tells its own story: 25 were F-85 club coupes, the plainest body on the list, 16 were Cutlass Holiday coupes, 8 were F-85 DeLuxe Holidays, 5 were Cutlass sports coupes and none were convertibles. At 54 of 24,180, the W-30 was about one 4-4-2 in 450.^2,6

How many 4-4-2s were built in all is a matter on which sources disagree. Over-Drive's table totals 24,180, made up of 21,997 cars with the standard 350-horsepower engine, 2,129 L69s and 54 W-30s. Wikipedia gives 21,997 as the year's production, which matches the standard-engine column alone and may leave out the L69 and W-30 cars. Neither names the Oldsmobile record behind it. By body, the table counts 14,680 Cutlass Holiday coupes, 4,175 sports coupes, 3,093 convertibles, 1,403 F-85 DeLuxe Holidays and 829 F-85 club coupes, about 9 percent of the 264,198 F-85s and Cutlasses built.^6,2

Either figure left the 4-4-2 behind its rivals in volume. The Standard Catalog figures reproduced by MuscleCarClub.com count 96,946 GTOs for 1966, and ChevelleStuff's tables count 72,272 Chevelle SS 396s, 66,843 sport coupes and 5,429 convertibles. Buick's Skylark Gran Sport, now its own series, came to 13,816 in Over-Drive's table. The GTO alone outsold the 4-4-2 roughly four to one, even on the higher Oldsmobile figure. In Car and Driver's March 1966 comparison of six super cars, several of the entries arrived openly prepared by tuners, while the magazine singled out 'the three most stock machines, the Chevelle, the Buick and the 4-4-2' as the ones that gave the least trouble.^7,8,9,10

The L69 turned out to be a one-year engine. Wikipedia records that General Motors issued a corporate directive eliminating multiple-carburetor options, with only the Corvette and Corvair excepted, which ended the L69's availability after 1966. The outside-air idea behind the W-30 did not depend on the number of carburetors, and the W-30 name returned on the 1967 4-4-2. So would outside help. Ate Up With Motor records that George Hurst's company opened its Hurst Performance Center in Detroit in 1965, with former GM man Jack Watson at its head, and in 1968, with Oldsmobile's John Beltz championing the project, Hurst produced the first Hurst/Olds.^2,5,11

The 1966 4-4-2 therefore marks the moment Oldsmobile's performance package briefly outran its corporate rules. For one year a buyer could order three carburetors from an Oldsmobile dealer, and a few dozen racers could get cold-air induction straight from Lansing. Ate Up With Motor counts 515 Hurst/Olds cars in 1968, 451 hardtops and 64 sports coupes, assembled in Lansing without engines and finished by Demmer Engineering, a route around the corporate rules that governed the regular 4-4-2. The 1966 car had done it the other way, inside the limit, with 54 W-30s and 2,129 L69s in the table, and a Motor Trend test car that ran 13.8 seconds once its tires were changed.^5,6,1,2