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Custom Dodge Ram Performance Mods - Engine - 5.7 HEMI V8 Discuss modifying your Dodge Ram with Performance Parts and Accessories!
Factory Spec: 5.7-liter HEMI® V8 engine - 390 horsepower, 407 lb-ft of torque.


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  #1  
Old 08-20-2009, 11:39 PM
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Default What size is the 2004 5.7 hemi

what size is it, the 345 or the 347
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Old 08-20-2009, 11:59 PM
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I think it's a 345 .
The first generation 5.7 liter Hemi produced roughly (it varies by car/truck) 345 horsepower (5,600 rpm) and 375 lb-ft of torque (4,400 rpm) from 5.7 liters (345 cid*) when used in the Dodge Ram - one horsepower per cubic inch. In the Charger, 300C, and Magnum RT, it produced 340 horsepower but 390 lb-ft of torque. [Exact LX figures: 340 horsepower (254 kW) @ 5000 rpm and 390 lb.-ft. torque (525 N•m) @ 4000 rpm. The Charger Daytona R/T squeezed out 350 horsepower.] Power and gas mileage boosts arrived for the 2009 model year.
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Old 08-21-2009, 05:14 AM
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I think IM likin them 345`s lol they got more hp and torque than a 360
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Old 08-21-2009, 07:17 AM
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From what I can tell, it's the 345. Allpar.com has a good breakdown on the different engines uesd.
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Old 08-21-2009, 07:18 AM
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5.7 litre = 347.835341 cubic inch
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Old 08-25-2009, 01:12 AM
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x2..it's 347 cubic inch's
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Old 06-30-2012, 02:36 AM
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Well this thread was VERY helpful!!! NOT

(I know this thread is old, but I had to comment. This didn't help at all.)
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Old 06-30-2012, 11:24 AM
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From allpar

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).
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Old 06-30-2012, 11:44 AM
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Quote:
Originally Posted by Flaminchiten View Post
From allpar

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).
X2, you have to use metric (everything is anyway) to calculate it accurately.
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  #10  
Old 06-30-2012, 03:31 PM
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i was always taught liters * 61 gets you your cubic inches
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