What was the torque number on a Buick nailhead?
What was the torque number on a Buick nailhead?
Buick was so impressed with their torque figures that the air cleaner on that engine was marked “Wildcat 445” – which was the torque number, not the displacement or horsepower. The Nailhead was no slouch. They found themselves into some GM heavy truck applications as did the Pontiac V8s. They pulled like troopers.
Why are torque specifications important for nailhead engine?
Dry or dirty threads produce friction which prevents accurate measurement of the actual torque. It is important that these specifications be strictly observed. Over tightening can damage threads. This will prevent attainment ‘of the proper torque and will require replacement of the damaged part. Flywheel .to Crankshaft (Auto. & Manual)
How big is the pushrod hole on a Buick nailhead?
The early 264-322 heads (up to mid-1955) have a very small pushrod hole that should be enlarged if a larger cam is used, explains Martin. All 1959-’66 364, 401 and 425 heads have the same ports and valve size; the 1957-’58 heads are the same with smaller valves.
What kind of engine does a 1953 Buick nailhead have?
“The 1953 322 is a separate motor, with a special block, heads and pistons, etc., but the 1954-’55 and ’56 engines also have many differences, both with the 322 but also with the 1954-’55 264 engine as well.
Buick was so impressed with their torque figures that the air cleaner on that engine was marked “Wildcat 445” – which was the torque number, not the displacement or horsepower. The Nailhead was no slouch. They found themselves into some GM heavy truck applications as did the Pontiac V8s. They pulled like troopers.
“The 1953 322 is a separate motor, with a special block, heads and pistons, etc., but the 1954-’55 and ’56 engines also have many differences, both with the 322 but also with the 1954-’55 264 engine as well.
What was the intake length of a 322 nailhead?
Already the first 322 nailhead had a camshaft that was the equivalent of a “super race cam” at the time; one that would be typically installed from an aftermarket supplier. The intake duration was 282 degrees, and the exhaust 292 degrees, with a 67 degree overlap, along with very steep ramps for extra rapid valve opening.
Why are the blocks tall on a Buick nailhead?
“The blocks have a tall deck height for a good rod stroke ratio (the taller block allows for a longer rod). The short stroke lets the engine spin quicker than a longer stroke engine.
