Pontiac 326 motor

This small displacement engine packed a lot of punch. There is a reason why we used to preface automobile engines, like the Pontiacwith the manufacturer's name. While many cars today share engine platforms pop the hood on a Buick, Cadillac, Pontiac 326 motor, etc. Back in the '60s and '70s, the individual divisions took great pride in manufacturing their own unique engines.

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Pontiac 326 motor

For , the unit-construction Y-body Pontiac Tempest and Le Mans, which featured a unique torque-tube and flexible driveshaft, a rear-mounted transaxle and independent rear suspension, were scheduled to increase in size and weight. The division had been using the Buick-built aluminum cu. V-8 engine in them as an option above the Pontiac four-cylinder, but now needed a midsized V-8 for what was growing very close to a midsized car. Dropping in the regular-production cu. However, with some reengineering, the existing V-8 design had potential. Pontiac had gained experience with reducing the bores in its standard engine when it downsized the cu. V-8 in and the cu. It was also possible to put the engine on a weight-loss program by employing thin-wall casting techniques for the "" and and even the By decreasing bore size to 3. Any features required for mounting the engine in the Tempest and Le Mans were also added. Despite the fact that this "new" engine measured cubic inches, Pontiac identified it as a V in marketing materials and on the car's emblems.

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The engines feature a cast-iron block and head and two valves per cylinder. Engine block and cylinder heads were cast at Saginaw Metal Casting Operations then assembled at Tonawanda Engine before delivery to Pontiac Assembly for installation. Initially marketed as a cu in 4. In the s the popular cu in 6. Unusual for a major automaker, Pontiac did not have the customary "small-block" and "big-block" engine families common to other GM divisions, Ford, and Chrysler. Effectively, production Pontiac V8 blocks were externally the same size sharing the same connecting rod length 6.

The Pontiac engine was a V8 engine introduced in to replace the Pontiac It was a smaller engine than the , with a displacement of cubic inches 5. The was a popular engine for Pontiac and was used for a variety of vehicles, including the Firebird, Grand Prix, Catalina and Bonneville. But why did Pontiac decide to call the a ? The answer lies in the fact that the engine was actually a modified version of the larger Pontiac engine. The was a V8 engine introduced in with a displacement of cubic inches 5. The was essentially a slightly modified version of the , using the same block, heads and other components. Pontiac chose to keep the name of the larger engine, and simply call the smaller version the

Pontiac 326 motor

The engines feature a cast-iron block and head and two valves per cylinder. Engine block and cylinder heads were cast at Saginaw Metal Casting Operations then assembled at Tonawanda Engine before delivery to Pontiac Assembly for installation. Initially marketed as a cu in 4. In the s the popular cu in 6.

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In the HO was upgraded again with the addition of the HO cam, commonly referred to by enthusiasts as the cam. Compression ratio was a modest 8. Stands for Pontiac 4 barrel About same flow as old iron stock unit, but much lighter and less heat soak. Interestingly enough, this would fall just one cubic inch short of the found in the split-window C2 Corvette. These stronger cast blocks were assembled and stockpiled for the and Firebirds equipped with the W72 Performance Package. This engine was first offered in as the top engine option in full-size Pontiacs. But for all his obvious drive, this is still a hobby. I need to figure out my front brackets and pullies, with the new water pump things no longer align…. Whether all were installed in GTOs is unknown. For the V8 was bored out to 3. Toggle limited content width. Sort by Oldest first Oldest first Newest first Most reactions. Lutz then cuts the plans up to create patterns for the cardboard substructure and cross-sections, incorporating as many bulkheads as he deems necessary.

For , the unit-construction Y-body Pontiac Tempest and Le Mans, which featured a unique torque-tube and flexible driveshaft, a rear-mounted transaxle and independent rear suspension, were scheduled to increase in size and weight.

Both used a single two-barrel carburetor. Additionally, the W72 never received the option to come equipped with a manual transmission like the standard received in , and disappointingly, production for all Pontiac V8's ended soon after as GM sought to "corporatize" engine production. March 1, Pontiac in the s was one of a few US manufacturers that did not regularly identify their engine names and sizes with air-cleaner or valve-cover decals. Parts for Ram Air V engines are not readily available. Now to get this bare block into paint before it flash rusts. However, it was a bump up in the compression ratio that made the biggest difference. Pontiac By reconfiguring the , a midsized V-8 was born. The valve size increased as well, to 2. Forged rods and forged-aluminum pistons were specified, as were unique high-flow cylinder-heads. Sell Other. In , to assist in meeting CAFE emissions standards, Pontiac drastically modified the structure and metallurgy of the blocks being produced. In , Pontiac moved on to a technologically simpler nodular cast iron invented in late s crankshaft, which they used until The main innovation of the Pontiac engine was reverse-flow cooling and the stamped rocker-arm system, which had been devised by Pontiac engineer Clayton Leach in By decreasing bore size to 3.