Was The Pontiac 400 A Big Block?

Was The Pontiac 400 A Big Block?. Weights of a typical sbc compared to a pontiac (both with aluminum intakes and iron exhaust) you can expect about 550 and 650 lbs, respectively. Based on production block and heads, this combination provides plenty of power with quality bottom end components to allow for.

the cynical gearhead Chrysler 400 big block spray can rebuild update. from jtsjunkyard.blogspot.com

The pontiac 400/455 is not a big block, the pontiac blocks are externally the same. At one time, bragging about owning a. Edelbrock performer 750 cfm carburetor.

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Featuring a pontiac 400 cubic inch block stroked to 455 cubic inches, this authentic pontiac stroker is perfect for street and strip use. The motor mounts are the same but will require the frame location mounting to be moved forward about 3/4 inch.

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The block from 1955 got poked and stroked all the way up to a 455. The pontiac has a different bellhousing bolt pattern, reffered to as the bop style or buick olds, pontiac style.

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Featuring a pontiac 400 cubic inch block stroked to 455 cubic inches, this authentic pontiac stroker is perfect for street and strip use. A chevrolet 348 was a big block, but a chevrolet 350 was a small block.

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Pontiac engines all have the same basic architecture, with common 4.620″ bore centers and a 10.24″ deck height, with the exception of the 265, 301, 303, and 366, which had 9.137″ deck heights. First of all, it needs to be pointed out that one cannot conflate gm with chevrolet, since gm has had a few divisions with their own engine designs, of which chevrolet was just.

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The 396 is a big block and there were certain 400's. Buick and oldsmobile 455s were big blocks, but a pontiac 455 was not.

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Edelbrock performer 750 cfm carburetor. When building a pontiac big block engines the target is “bigger is better”.

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If you want to annoy a true pontiac fanatic, look at his motor and call it a big block. Weights of a typical sbc compared to a pontiac (both with aluminum intakes and iron exhaust) you can expect about 550 and 650 lbs, respectively.

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The edelbrock cylinder heads have ram air exhaust iv ports—so you should use this set of hedman headers. Keep your compression ratio at about 9.5:1.

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A chevrolet camaro 396 had a big block, but a pontiac firebird 400 did not. Any gm engine 400 cubic inches and under are considered a small block with two exceptions.

Same External Dimensions All Those Years.

Pontiac engines all have the same basic architecture, with common 4.620″ bore centers and a 10.24″ deck height, with the exception of the 265, 301, 303, and 366, which had 9.137″ deck heights. Pontiac date code on the cylinder head reggie horning. Depends on which pontiac engine you are referring to.

Did Gm Make A 400 Small Block And A 400 Big Block?

I am not bashing the chevy but the pontiac is better imo. Buick and oldsmobile 455s were big blocks, but a pontiac 455 was not. A chevrolet camaro 396 had a big block, but a pontiac firebird 400 did not.

The Pontiac Has A Different Bellhousing Bolt Pattern, Reffered To As The Bop Style Or Buick Olds, Pontiac Style.

When building a pontiac big block engines the target is “bigger is better”. Edelbrock performer 750 cfm carburetor. Any gm engine 400 cubic inches and under are considered a small block with two exceptions.

On Blocks Produced In 1970 And After, You Will Find 350, 400, Or 455 Stamped Towards The Left Side Of The Front Of The Block.

The motor mounts are the same but will require the frame location mounting to be moved forward about 3/4 inch. Keep your compression ratio at about 9.5:1. There is no displacement stamp for 421, 389 or 326 blocks.

If You Want To Annoy A True Pontiac Fanatic, Look At His Motor And Call It A Big Block.

The pontiac 400 engine was used as a high performance engine in sports cars, and it was used in large cars as a workhorse type engine. The pontiac block uses the same bellhousing pattern as buick, olds, and cadillac. With the right heads and build i would much rather have a pontiac 400 than a chevy 400.