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 Library Home > Pontiac > Pontiac Trans Am > 1978 Pontiac Trans Am

 

1978 Pontiac Trans Am
Firebird and Trans Am sales soared in 1978 to a record 187,285

1978 Pontiac Trans Am

Much remained the same in 1978 for the styling of the Trans Am & Firebird. Pontiac was now capitalizing on the popularity of the Firebird and Trans Am as sales soared to a record 187,285 for all. Pontiac engineers reversed years of declining power by raising the compression ratio in the Pontiac 400 through the installation of different cylinder heads with smaller combustion chambers (1977 pontiac 400 engines also had the 350 heads bolted to the 400 blocks, these heads were known as the 6x-4 heads)(taken from the Pontiac 350). This increased power by 10% for a total of 220 during the 1978-79 model years. The 400/403 options remained available until 1979, when the 400 CID engines were only available in the 4-speed transmission Trans Ams and Formulas (the engines had actually been stockpiled from 1978, when PMD had cut production of the engine).

 

 

 Firebird  base price $4,545  32,672 produced
 Firebird Esprit    36,926 produced
 Firebird Formula    24,346 produced

 

Pontiac Trans Am  base price $5,799  93,341 produced

 

Engine Options

  • V6  231, "A" Code - 105hp
  • V8 305 "U" Code - 145 hp
  • V8 350, "X" Code - 155 hp
  • V8 350, "L" Code - 170 hp
  • V8 350, "R" Code - 170 hp
  • V8 400, "Z" Code - 180 hp, Note: Optional T/A V-8 same as V8 400, only with 220 hp!

Note: V8 403 cid, was used in all Calafornia models! 

 

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