What was the displacement of a Pontiac V8 in 1955?
A machined (decked) cylinder head was utilized to boost compression ratio to 8:1, and increased horsepower to 180. A 200-hp version was introduced in mid 1955 when a 4-barrel carburetor was made available. Engine displacement grew to 316.6 for 1956, and horsepower increased to 205 for the 2-barrel and 227 for the 4-barrel.
What was the compression ratio of a Pontiac V8?
The rocker system, consisting of a stamped-steel rocker arm pivoting on a single stud, was one that many other manufacturers adopted for their V-8s in later years. Engines featuring a compression ratio of 7.4:1 were rated at 173 hp. A machined (decked) cylinder head was utilized to boost compression ratio to 8:1, and increased horsepower to 180.
What was the top of the line Pontiac engine in 1969?
Pontiac’s top engine option in 1969 and 1970 was its Ram Air IV (R/A IV), which had a solid 6,000-rpm operating limit. The intake-port roof of the round-port R/A IV cylinder head was raised 1/8 inch and the intake port volume was increased from 153 to 180 cc, which allowed it to operate at its intended limit.
When did the Pontiac V8 get extra horsepower?
Optional dual exhaust added about 10 hp to either engine. Pontiac created its first extra-horsepower package in mid 1956. With more compression, dual 4-barrel carburetors, and a special camshaft, the combination boosted horsepower to 285.
What are the names of all the Pontiac cars?
1 1936 Pontiac Master Six Coupe 2 1948 Pontiac Silver Streak Convertible Coupe 3 1956 Pontiac Canadian Pathfinder Sedan Delivery 4 1959 Pontiac Bonneville 5 1964 Pontiac Bonneville Brougham 6 1969 Pontiac GTO convertible 7 1973 Pontiac Grand Am 8 1975 Pontiac Astre 9 1975 Pontiac Grand Ville 10 1985 Pontiac Firebird Trans-Am
When did the last Pontiac V8 engine come out?
The last “true” Pontiac V8s, a 265 and 301 cu in (4.3 and 4.9 L), ended production in early 1981. The 1955-up Pontiac V8 that finally reached the public was an overhead valve engine with cast iron cylinder heads and block and wedge-shaped combustion chambers.
What kind of engine did Pontiac have in 1980?
Oh, right; this was 1980-1981, the golden era for GM’s undersized and underpowered V8s. An EPA special, one assumes, until one looks at the EPA numbers. The only thing I could find was this from the 1981 brochure for the 116″ wheelbase Pontiacs (B-Body), that had EPA numbers for all three engines. The 3.8 V6 numbers (20/30).
How big is the engine in a Pontiac?
In 58 they used the same block as Pontiac, but only bored it to 3.875″ giving a 336.1 cubic inch engine instead of Pontiac’s 370. In 59 they again used the same block as Pontiac, but only bored it to 3.78″ giving 336.9 cubic inches instead of Pontiac’s 389.