Quote:
Originally Posted by padgett
Back in the day, Pontiac was notorious for limiting HP in lower line cars by playing with carbs and air filters. The "Firebird tab" is well known but limiting the A-body tripower with pretty but too small pots while the B-body got a single 1,000 cfm paper element.
Look at the brochures from back in the day. Same engine, same carb(s), same cam had different hp rating for each car line.
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Still, the highest horsepower Tripower 421īs got the "small pots".
Also, different hp ratings , same engine, for the car lines was due to the 1 hp per 10 pound insurance policy.
FWIW