rumblefish360
Well-Known Member
Timing cover = yes
Oil pan = no
The 360 has a different size at the rear of the pan.
can a 318 be made into a 360?
- Thread starter flatheadgary
- Start date
Oil pan = no
The 360 has a different size at the rear of the pan.
flatheadgary
Well-Known Member
wow, you guys really got into my thread!! yea as to the question, why not just get a 360, there don't seem to be any around here. i have several bb's, one in a dragster and one will eventually go in my '63 belvedere. as far as the 318 goes, isn't the most used ford a 302? that damn motor has some great performance history to it. the sb mopar has 16 more inches. there is also a lot of history to sb mopars but mostly the 340 and 360's. i was just wondering why everybody dogs the teen so much. oh and i do like the idea of a 390 sb. here's another conversation question. if you can take a teen to 390 what can a 360 be made into?
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It depends on what year the 360 block is.
The early 360 blocks were built with thicker cylinder walls. The bore was 4.0 but the block was based on 340 blocks that were finish bored to 4.040. In theory, if a 340 could be bored .030 over, (A conservative number...many can go bigger) That 360 could go to 4.070. Again, not all blocks can go this far, some had thin spots throughout the block due to the mold shifting during the casting and manufacturing process. The smart money is on sonic checking and not boring the cylinders to the point where the remaining cylinder wall thickness is less that .200". Thinner cylinders flex more, making it difficult for the piston rings to form an effective seal. The few cubic inches you'd gain are more than lost by poor ring sealing from distorted cylinder walls.
By the way, a 340 with a 4.0 stroke crank is a 416 if the block is bored .030. A 360 bored .030 with a 4.' crank is a 412. The reason that the cubic inch gain is higher with the 318 is because the increase in stroke is more. The 318 stroke is 3.31, the 360 stroke is 3.58.
The early 360 blocks were built with thicker cylinder walls. The bore was 4.0 but the block was based on 340 blocks that were finish bored to 4.040. In theory, if a 340 could be bored .030 over, (A conservative number...many can go bigger) That 360 could go to 4.070. Again, not all blocks can go this far, some had thin spots throughout the block due to the mold shifting during the casting and manufacturing process. The smart money is on sonic checking and not boring the cylinders to the point where the remaining cylinder wall thickness is less that .200". Thinner cylinders flex more, making it difficult for the piston rings to form an effective seal. The few cubic inches you'd gain are more than lost by poor ring sealing from distorted cylinder walls.
By the way, a 340 with a 4.0 stroke crank is a 416 if the block is bored .030. A 360 bored .030 with a 4.' crank is a 412. The reason that the cubic inch gain is higher with the 318 is because the increase in stroke is more. The 318 stroke is 3.31, the 360 stroke is 3.58.
rumblefish360
Well-Known Member
FWIW, I had a 340 tank at .030.
It will make for an excellent table soon.
It will make for an excellent table soon.
wyrmrider
Well-Known Member
I do not know or I missed it if anyone answered OP's basic question on why oil pans do not interchange between 273/ 318/340 and 360
It's because the larger main bearings on the 360 get larger main caps which have larger seal registers
You also have to get a pan not only with the right block fit but the correct pan for your chassis- trucks are different than cars
It's because the larger main bearings on the 360 get larger main caps which have larger seal registers
You also have to get a pan not only with the right block fit but the correct pan for your chassis- trucks are different than cars
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