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post #1 of (permalink) Old 10-13-1999, 05:45 PM
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gear heads help me out

i'm about to purchase a 318 short block bored 40 over.

what will displacement be.

will it run hot?

'85 ramcharger

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post #2 of (permalink) Old 10-20-1999, 09:19 PM
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Re: gear heads help me out

.040 over is a standard repair bore. Difference in displacement is minimal, made only a few ci. Cooling won't be a problem either unless you do some mods that make horsepower. However, a fresh motor may put a strain on an old, clogged radiator and cause overheating where it didn't before the rebuild.

Geo. - 87RC
post #3 of (permalink) Old 10-20-1999, 10:56 PM
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Re: gear heads help me out

It will be 324 cid...I have a .060 318 that ran with no just gave way to a big block thats all..Maxt

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post #4 of (permalink) Old 10-29-1999, 02:40 AM
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Re: gear heads help me out

its simple math , pie x r squared x stroke = displacement,a 318 is 3.91 bore with a 3.31 stroke so//// 3.91 040=3.95
pie,3.1416 x r 1.975 =6.204 x r1.975=12.254 xstroke 3.31= 40.561 ci per cyl x 8 cyl=324.49 ci. You will now have
a 324.49 instead of a forget the 318 and go buy a 360! its the same eng. just more stroke more bore (4.0x3.58)
bigger heads...///GT

post #5 of (permalink) Old 10-29-1999, 03:13 PM
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displacement formula

thanks gt. thats the formula that i was looking for. you've taught me to fish. nick

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