difference between 4.6 and 5.4 - Ford Truck Enthusiasts Forums



difference between 4.6 and 5.4

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Old 02-25-2004, 10:54 PM
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difference between 4.6 and 5.4

I know they have the same bore, are the cylinders taller on the 5.4 or do they share the same cylinders?
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Old 02-26-2004, 04:00 AM
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Granted I'm no expert, but assuming the bore is the same that means the stroke would have to be longer meaning that the 5.4 would have longer connecting rods and a larger crank.
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Old 02-26-2004, 01:20 PM
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Krunker, don't you mean shorter connecting rods and a longer stroke on the crank?
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Old 02-26-2004, 01:59 PM
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I realize it would need a longer stroke but do they share the same cylinders or are the 5.4's taller?
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Old 02-26-2004, 05:33 PM
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Quote:
Originally posted by mantta
Krunker, don't you mean shorter connecting rods and a longer stroke on the crank?
Ya, that sounds more like it, although I think the 5.4 is also a little taller and wider. I have the manual for 1997 and newer F-150's, I'll consult it and report back. Also, when you ask if they share the same cylinders, do you actually mean pistons or the actual liners in the block?

Last edited by krunker; 02-26-2004 at 05:37 PM.
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Old 02-26-2004, 09:30 PM
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The 5.4L block is taller to accomodate the longer stroke. They have the same bore.
The stroke on the 5.4L is 4.14". The block is taller and wider so the intakes will not interchange. The bolt on accesories in the front will interchange. The heads are the same as well as the camshafts.
If you are looking to upgrade from a 4.6L to a 5.4L, check out Ford's new 5.0L Modular engine with a redesigned block for a larger bore with 4.6L stroke.
Jimmy
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