During my last visit to the Chrysler Nationals I visited one of the earliest 426 Hemi engine blocks. Let’s examine why this block is the earliest surviving 426 Hemi engine block. The 426 Hemi engine block has an early casting date of 10/17/63. The letters, EXO, on the engine pad and poor casting areas throughout…
The 440 engine wrist pin size and pistons are often asked. Let’s answer, what size wrist pin and pistons are in a 440 engine? The 440 wrist pin is 1.0935″-1.0937″ diameter and 3.555″-3.575″ long. The pistons are made to fit a 4.320″ engine bore size. Continue reading below for more of the 440 engine pistons,…
The 440 Six Pack or Six Barrel piston and wrist pin sizes are often asked. Let’s answer, what size pistons and wrist pins are in a 440 Six Pack engine? The 440 Six Pack/6-BBL pistons are made to fit a 4.320″ engine bore size. The wrist pin is 1.0935″-1.0937″ diameter and 3.555″-3.575″ long. Continue reading…
The list number on the 440 carburetor will help you identify the details about the carb. Let’s examine, what are the 440 carburetor identification numbers? The following are the 440 carburetor numbers by year, 1966-1974: The remainder of this article provides detailed information about each of the 440 carburetors. This includes the brand, model, jet…
The big block Mopar 440 was one of the most powerful engines Chrysler produced in the 1960s and early 70s. For this reason many people ask, how much HP does a stock 440 have? The 440 high-performance peaked at 375 horsepower @ 4,600 rpm and 480 ft. lbs. of torque @ 3,200 RPM from 1967-1970….
There are many questions about the torque specs for a Mopar 440 intake manifold. There is different specs depending on the year. The Mopar 440, 1969-1978, factory cast iron intake manifold bolts are torqued to 40 foot-pounds. The Chrysler service manual states for the years 1966-1968, the intake manifold bolts are torqued to 50 foot-pounds….
Since the 440 Six Pack or Six Barrel used two different intake manifolds, many questions are asked about the torque specs. There are different specs for each one. Let’s examine them. The 1969 440 Six Pack or 6-BBL aluminum intake manifold bolts are torqued to 25 foot-pounds. The 1970 and 1971 cast iron intake manifold…
There are many reasons why you may want to know the casting numbers on a Mopar 440 engine. Let’s identify them for each year of production. The following are the 440 cylinder head casting numbers: This article will explain where to find the casting numbers for each cylinder head and some general facts which you…
There are a few reasons why you would want to know the casting numbers for a 440 Six Pack engine. The following are the Mopar 440 Six Pack or Six Barrel cylinder head casting numbers: A few known Six Pack/6BBL engines were produced in 1972, although the numbers are extremely limited and rare. This article…
The 440 Six Pack or 6-BBL head torque sequence and torque specs for the cylinder head bolts is a question often asked. Factory 440 Six Pack or 6 Barrel cylinder head bolts are torqued to 70 foot-pounds. The head bolts are torqued in two steps, first 40 ft. lbs. then 70 ft. lbs., while following…
The Mopar 440 head torque sequence and torque specs for the cylinder head bolts is a question often asked. Factory 440 cylinder head bolts are torqued to 70 foot-pounds. The head bolts are torqued in two steps, first 40 ft. lbs. then 70 ft. lbs., while following the torque sequence. The following diagram is the…
A popular topic about Mopar 440 engines is what kind of camshaft it had from the factory. Let’s answer, what was the stock 440 cam specs? The stock cam specs for the Mopar 440 high-performance engine are the following: The stock cam specs for the Mopar 440 standard engine are the following: This article will…
A popular topic about 440 Six Packs is what kind of camshaft it had from the factory. Let’s answer, what was the stock 440 Six Pack cam specs? The 440 Six Pack camshaft specs are a .450″ intake lift and .458″ exhaust lift. The duration is 268° intake and 284° exhaust. The durations @ .050…
The Six Pack or 6-BBL engine timing is a topic often asked by 440 owners. The following are the 440 Six Pack or 6-BBL timing specs for each year. This article will dive more into detail about each year including the factory initial, advanced vacuum, advanced mechanical and total timing. Also, the factory specs from…
The 440 Six Pack or Six Barrel carburetors are often talked about. One of the most common questions is their list numbers or date codes. Let’s answer, what are the 440 Six Pack carb numbers? The following are the 440 Six Pack carburetor numbers for all years: The remainder of this article provides detailed information…
Many owners wonder what their Mopar 440 idle speed or RPM should be set at or what was set by the factory when new. The following are the Mopar 440 High-Performance idle speeds for each year: The following are the standard Mopar 440 idle speeds for each year: Keep reading for more details and why…
Many Mopar owners wonder what their 440 Six Pack idle speed or RPM should be set at or what was set by the factory when new. The following are the 440 Six Pack/Six Barrel idle speeds for each year: Keep reading for more details about each year. In addition, this article will explain each fast…
Today the car manufacturers advertise the size of their engines in liters. It wasn’t always like this. During the 440 Six Pack era, engines were advertised in cubic inches. This makes many people wonder how many liters is a 440 Six Pack engine? A Mopar 440 Six Pack or Six Barrel engine is 7.2 L…
Almost all of the newer car manufacturers advertise the size of their engines in liters. During the 440 era, it was all about cubic inches. This makes many people wonder how many liters is a 440? A 440 is 7.2 L rounded off. The exact liter measurement of the Mopar 440 is 7.21030816 liters. Keep…
The 440 engine packs a lot of power and a ton of torque. For this reason many people wonder about some of its specs like compression ratio. Let’s answer, what is the compression ratio of the Mopar 440? The Mopar 440 compression ratio was 10.1:1 from 1966-1969. In 1970 the compression ratio decreased to 9.7:1….
Its compression ratio is one of the specs which makes the Six Pack and Six Barrel the most powerful 440 engine produced by Chrysler. Let’s answer, what is the compression ratio of the 440 Six Pack? In 1969 and 1970 the 440 Six Pack compression ratio was 10.5:1. In 1971 the compression ratio was slightly…
The 440 Six Pack or 6-BBL main bearing clearances, main journal and bore size is often asked. Let’s take a close look at each one. The 440 Six Pack desired main bearing clearance for 1969-1970 is .0005″-.0015″ and .0005″-.002″ for 1971. The maximum allowed clearance is .0025.” The main bearing journal diameter is 2.7495″-2.7505″ and…
Knowing the Six Pack deck height may help when modifying the engine or doing a stock rebuild. Let’s answer, what is the deck height of a 440 Six pack? The deck height of a Mopar 440 Six Pack or 6-BBL is 10.725 inches. The deck height is the distance from the centerline of the crankshaft…
The 440 Mopar main bearing size, main journal and bore size is often asked. Let’s take a close look at each one. The 440 main bearing journal size (diameter) is 2.7495″-2.7505.” The outside diameter of the main bearing or the main bearing bore size is 2.9425″-2.9430.” This article will take a deeper dive into the…
The Mopar 440 rod journal size is a question which comes up often. Let’s examine what the 440 rod journal size is. The Mopar 440 connecting rod journal diameter is 2.374″-2.375.” The rod bearing bore size or outside diameter of the rod bearing is 2.5000″-2.5005.” This article will explain the journal measurements and sizes in…
Knowing the firing order of a big block Mopar engine is important when tuning an engine. Therefore, let’s answer, what is the firing order of a Mopar 440? The big block Plymouth or Dodge 440 firing order is 1-8-4-3-6-5-7-2. This article will inform you of all the cylinder number locations on the engine. Also, where…
Knowing the deck height may help when modifying the engine or doing a stock rebuild. Let’s answer, what is the deck height of a Mopar 440? The deck height of a Plymouth or Dodge 440 is 10.725 inches. The deck height is the distance from the centerline of the crankshaft to the deck surface of…
The 440 Six Pack or 6-BBL rod journal size is a question which comes up often. Let’s examine what the 440 Six Pack rod journal size is. The 440 Six Pack rod journal diameter is 2.374″-2.375.” The rod bearing bore size or outside diameter of the rod bearing is 2.5000″-2.5005.” This article will explain the…
The size of the factory 426 Hemi rod journal size is a question which comes up often. Let’s examine what the 426 Hemi rod journal size is. The 426 Hemi connecting rod journal diameter is 2.374″-2.375.” The rod bearing bore size or outside diameter of the rod bearing is 2.5000″-2.5005.” This article will explain the…
The size of the factory 426 Hemi main bearing journal and the main bearing bore size is a question often asked. These measurements are necessary for bearings and clearances. The 426 Hemi main bearing journal size (diameter) is 2.7495″-2.7505.” The outside diameter of the main bearing or the main bearing bore size is 2.9425″-2.9430.” This…