Why a 360?
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Sorry, but the 360 and 390 are simply NOT vastly different in weight.
The blocks, heads, manifolds, accessories, carbs are the same. The pistons weigh the same. 360 rods are .056" longer than 390 rods at the extremes, so while they are reported to be lighter duty, I doubt they weigh more than a few grams less. The crank--the throw is .142" different, not "173"--where did you get that?
So a few pounds maybe, but not hundreds or even 10s of lbs different.
The blocks, heads, manifolds, accessories, carbs are the same. The pistons weigh the same. 360 rods are .056" longer than 390 rods at the extremes, so while they are reported to be lighter duty, I doubt they weigh more than a few grams less. The crank--the throw is .142" different, not "173"--where did you get that?
So a few pounds maybe, but not hundreds or even 10s of lbs different.
Senior User
Joined: Nov 2010
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From: South-East Idaho.
engine
Sorry, but the 360 and 390 are simply NOT vastly different in weight.
The blocks, heads, manifolds, accessories, carbs are the same. The pistons weigh the same. 360 rods are .056" longer than 390 rods at the extremes, so while they are reported to be lighter duty, I doubt they weigh more than a few grams less. The crank--the throw is .142" different, not "173"--where did you get that?
So a few pounds maybe, but not hundreds or even 10s of lbs different.
The blocks, heads, manifolds, accessories, carbs are the same. The pistons weigh the same. 360 rods are .056" longer than 390 rods at the extremes, so while they are reported to be lighter duty, I doubt they weigh more than a few grams less. The crank--the throw is .142" different, not "173"--where did you get that?
So a few pounds maybe, but not hundreds or even 10s of lbs different.
Fleet Owner
Joined: Jun 1999
Posts: 24,552
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From: Creedmoor, North Carolina
Also, i didnt mean to get into such specifics, the point is, the 360/390's are both great engines. Would take a 390 anyday of the week. But the 360 held ots pwn as a lighter duty ranch/ street engine and was a ligtle more street friendly than the 390 ( and i have a dozen zets of tires to prove it 
). Why they quit with the 352's? Have to write ford on that one.... Lets just all be happy we are FORD GUYZ AND GALS!!
). Why they quit with the 352's? Have to write ford on that one.... Lets just all be happy we are FORD GUYZ AND GALS!!Sorry bub.
John
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Joined: Dec 2007
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From: Lost
A 351M or 351W is a lot lighter than a 390, but a 360 (or 352 for that matter) is not any more than *maybe* 5 LBS lighter than a 390. Heck, the pistons in a 360 are simply 390 pistons from the old days.
Elder User
Joined: Jun 2006
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The 390 came before the 428 and outlasted it as well. Thats kind of my point, they already had the 390 when the 360 came along, whyd they bother. Besides, the 390 was a workhorse motor where the 428 was much more a performance motor. Also, the 360 was never put in anything besides a truck, a 428 was never put in trucks dunno why they didnt just use the 390
They had in the same period of time, anywhere from a 221-460. Some motors were better than others at higher RPMs, some at low, some had better emissions, some better torque. Read up on the terms "Square" "Oversquare" and "Undersquare"
Bigger is not always better, hence so many big (F600+) trucks coming with 370/429s, which can't cost any less to manufacture than a 460 that would use the same block. A 370 would probably make a terrible engine for a Mustang, but it's a good Class 6 truck motor
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Posting Guru
Joined: Dec 2009
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From: Mississippi
Yeah, I was just pointing out that the "they already have a bigger motor, why would they make another size" argument it silly.
They had in the same period of time, anywhere from a 221-460. Some motors were better than others at higher RPMs, some at low, some had better emissions, some better torque. Read up on the terms "Square" "Oversquare" and "Undersquare"
Bigger is not always better, hence so many big (F600+) trucks coming with 370/429s, which can't cost any less to manufacture than a 460 that would use the same block. A 370 would probably make a terrible engine for a Mustang, but it's a good Class 6 truck motor
They had in the same period of time, anywhere from a 221-460. Some motors were better than others at higher RPMs, some at low, some had better emissions, some better torque. Read up on the terms "Square" "Oversquare" and "Undersquare"
Bigger is not always better, hence so many big (F600+) trucks coming with 370/429s, which can't cost any less to manufacture than a 460 that would use the same block. A 370 would probably make a terrible engine for a Mustang, but it's a good Class 6 truck motor
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