HowStuffWorks “The 1977 Pontiac Grand Prix”

27 Apr 2015 | Author: | Comments Off on HowStuffWorks “The 1977 Pontiac Grand Prix”
Pontiac Grand Prix

The 1977 Pontiac Grand

The 1977 model year prove to be the Grand Prix’s on the second-generation G-body platform. All Prix models received a facelift for 1977, the most change being a new grille that featured a more waterfall effect. The fine bar treatment used in 1976 was with five thick on each side.

The taillamps also updated slightly. The from the previous year’s edition became a regular Prix option, and the optional wheels first seen in were discontinued in favor of a new aluminum wheel design.

©2007 Publications International,

The T-tops that were of the 1976 50th anniversary joined the regular options for 1977.

The ever-tightening California and emission standards contributed to the confusing engine roster the Prix had ever seen. on the state to which a car was to be delivered, might be a Pontiac-, Chevrolet-, or V-8 under the hood, as there was a engine lineup and a California and lineup.

The base GP engine for was Pontiac’s new 301-cubic-inch (4.9-liter) It shared many basic dimensions with an experimental 303 Am race engine from though the new production powerplant was not as beefy. Its deck was one inch than its larger siblings. rods measured 6.05 versus 6.625 inches for its brothers.

The bore and … measured inches, respectively, and the pistons and rods were shared Pontiac’s new 151-cubic-inch Iron four.

The new engine shared the three-inch main journal as the 350 and 400 V-8s. The block, heads, and manifold were very castings, and the crankshaft only had on each end in the interest of weight Although the 301 was based on the tried and Pontiac V-8, there enough differences to preclude a deal of parts interchange.

The result of the pound-shaving efforts the overall weight of the 301 significantly. the larger Pontiac engines the scales between 640 and 675 pounds, the new V-8 in at a very trim 452 pounds, the same weight as Buick’s V-6.

The 301 produced 135 horsepower at 3,800 with 240 pound-feet of torque at rpm. While the horsepower would only rank as for the current crop of four-cylinders, the level of the 301 was similar to other V-8 engines of the period and had the advantage of lighter in weight.

Pontiac Grand Prix

Next up the ladder was the 5.7 liter V-8 engine. on the time and plant in which a car was and the zone to which it was delivered, the might receive a 350-cubic-inch Olds, or Chevy engine.

There were a couple of for this. The first problem was the Pontiac 350 would not pass the California and high-altitude emission For those areas, the division the Oldsmobile-designed 350. Since the engines were cleaner than the other GM V-8s, was a great demand for them. The shortage of Olds 350s that not even Oldsmobile had of them for its Cutlasses.

In turn, 350 began filling in for the Olds

The top GP engine option for 1977 was the V-8, which was standard in the SJ. depending on time and place of the actual engine could be the Pontiac 400 or the cleaner-burning 185-horse 403. (Like the smaller-displacement V-8, the 403 was also in short The 455 was discontinued at the end of 1976.

Continue to the page to read about the Grand Prix’s sales

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Pontiac Grand Prix
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