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The factory rated it at 480@3600 rpm gross torque 335@4800 rpm gross horsepower. Ratings were changed in 1972 to SAE net.
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Which motor has the most horsepower a Pontiac 455 or Buick 455?
The Pontiac 455 came in 3 versions. Base, High Output, and Super Duty. The base 1970-71 engine produced 200 hp and 455 lb/ft torque. The Super Duty 1970-71 engine had 335 hp and 480 lb/ft torque. Power was reduced after 1971. The Buick 455 came in 2 versions. The 1970 Base engine had 350 hp and 510 lb/ft torque. The Stage 1 engine had 360 hp and 510 lb/ft torque. So as you can see the Buick was the more powerful engine by far.
What are the rocker arm torque specifications for a 455 cubic inch Oldsmobile engine?
According to most Oldmobile torque specs, the correct torque for rocker arm bolts is 25 ft-lbs.
How do you set distubitor timing on Pontiac 455?
How do you set distubitor timing on pontiac 455?
What are the specs on a Pontiac 455?
Horsepower and torque specs varied greatly depending on the year of production, highest per year were: 1970 455 =360-370hp@4600, 500lbft@2900 (hp depending on chassis engine was installed in, GTO got the lower hp rating) (only year of high compression 455, standard D port cylinder heads) 1971 455ho=335hp@4800rpm, 480lbft@3200(Round port heads, first year of low compression, massive torque, great street engine) 1972 455ho=300hp@4000rpm 415lbft@3200 (Round port heads, new sae net rating system, slight cylinder head change, nearly same engine as 1971) 1973-1974 455sd=290hp@4000rpm, 390lbft@3600rpm (Round port heads, under rated the strongest 455 Pontiac ever produced) 1975-1976 455=200hp@3500rpm (smog motor low performance) There were several other lower performance 455 Pontiacs produced during the engines 1970-1976 run. Those listed above are the highest performance available each year. Engine parameters for all 455 Pontiacs: bore-4.15 stroke-4.21 Main bearing size-3.25 rod bearing size-2.25 connecting rod legnth-6.625
Is Pontiac 455 heads exchangeable with Oldsmobile 455?
No, they are completely different.
Is a Oldsmobile 455 the same as a Pontiac?
No, they are not the same engine. The Oldsmobile 455 had a bore and stroke of: 4.126 X 4.25 The Pontiac 455 had a bore and stroke of: 4.152 X 4.21
Will Pontiac 455 bolt in 1977 grand prix?
Sure it will. Pontiac used the same block for all of it's 326 to 455 engines.
What is the firing order for a 76 Pontiac trans am 455 engine?
Answer Anonymously What is the diagram and firing order for a 76 Pontiac trans am 455 engine?
Can you replace a Buick 455 with a Pontiac 455?
Same block, should fir right in
What is the biggest motor made by Pontiac?
455
How much horsepower does a 455 in a1987 Pontiac trans am put out?
The 1987 Trans Am didn't have a 455
What is the fastest production Pontiac engines?
455 SD
