How many cubic inches?
Record Breaker
Joined: Feb 2009
Posts: 1,661
Likes: 1
From: Virginia Beach
Not according to the service manual.
DESCRIPTION
The 5.7L engine (348 CID) eight-cylinder engine is a 90° V-Type lightweight, deep skirt cast iron block, aluminum heads, single cam, overhead valve engine with hydraulic roller tappets. The heads incorporate splayed valves with a hemispherical style combustion chamber and dual spark plugs. The cylinders are numbered from front to rear; 1, 3, 5, 7 on the left bank and 2, 4, 6, 8 on the right bank. The firing order is 1-8-4-3-6-5-7-2.
DESCRIPTION
The 5.7L engine (348 CID) eight-cylinder engine is a 90° V-Type lightweight, deep skirt cast iron block, aluminum heads, single cam, overhead valve engine with hydraulic roller tappets. The heads incorporate splayed valves with a hemispherical style combustion chamber and dual spark plugs. The cylinders are numbered from front to rear; 1, 3, 5, 7 on the left bank and 2, 4, 6, 8 on the right bank. The firing order is 1-8-4-3-6-5-7-2.
Champion
Joined: May 2009
Posts: 3,497
Likes: 1
From: MN
Different Dodge listings mentioned 345, 348, 353, and 354 cubic inches as the engine size; possibly different people at Chrysler used different formulas to get at the cubic inches. Gaymon Wright's window sticker lists the Hemi as being 348 cid! Jack pointed out that the bore and stroke times pi times the number of cylinders = 353 - perhaps someone at Chrysler incorrectly used that formula. The 354 was probably a simple typo.
Derek wrote "the correct formula is pi x (bore/2) squared x stroke. This is because bore is a circle and area of a circle is pi x r squared! Try it and you will find 3.92/2 = 1.96; 1.962 (3.8416) x pi= 12.0687 x 3.58 stroke =43.20 x 8 cylinders = 345.6." (Mark Strode noted that if you use millimeters to avoid rounding error, you get 345.06).
I'm sticking with 345
Derek wrote "the correct formula is pi x (bore/2) squared x stroke. This is because bore is a circle and area of a circle is pi x r squared! Try it and you will find 3.92/2 = 1.96; 1.962 (3.8416) x pi= 12.0687 x 3.58 stroke =43.20 x 8 cylinders = 345.6." (Mark Strode noted that if you use millimeters to avoid rounding error, you get 345.06).
I'm sticking with 345
Record Breaker
Joined: Feb 2009
Posts: 1,661
Likes: 1
From: Virginia Beach
Different Dodge listings mentioned 345, 348, 353, and 354 cubic inches as the engine size; possibly different people at Chrysler used different formulas to get at the cubic inches. Gaymon Wright's window sticker lists the Hemi as being 348 cid! Jack pointed out that the bore and stroke times pi times the number of cylinders = 353 - perhaps someone at Chrysler incorrectly used that formula. The 354 was probably a simple typo.
Derek wrote "the correct formula is pi x (bore/2) squared x stroke. This is because bore is a circle and area of a circle is pi x r squared! Try it and you will find 3.92/2 = 1.96; 1.962 (3.8416) x pi= 12.0687 x 3.58 stroke =43.20 x 8 cylinders = 345.6." (Mark Strode noted that if you use millimeters to avoid rounding error, you get 345.06).
I'm sticking with 345
Derek wrote "the correct formula is pi x (bore/2) squared x stroke. This is because bore is a circle and area of a circle is pi x r squared! Try it and you will find 3.92/2 = 1.96; 1.962 (3.8416) x pi= 12.0687 x 3.58 stroke =43.20 x 8 cylinders = 345.6." (Mark Strode noted that if you use millimeters to avoid rounding error, you get 345.06).
I'm sticking with 345
I know that is from Allpar, but who is Derek??
Record Breaker
Joined: Feb 2009
Posts: 1,661
Likes: 1
From: Virginia Beach
Why would the Dodge engineers get the numbers wrong??
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Champion
Joined: May 2009
Posts: 3,497
Likes: 1
From: MN
Besides, Dodge used to advertise it specifically as a 345 when they came out with the Hemi claiming 1HP per cubic inch (with a 345 HP motor).
