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Old 10-01-2008, 07:11 PM
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.060 over 390 whats my cubic inches

I found out that the 390 in my 69 Ford has been bored .060 over. I was wondering how many cubic inches it is now

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Old 10-01-2008, 07:17 PM
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From what i under stand it would come out to a 400. A 350 .30+ is a 355 5 more cid. So .60+ would be 10 more cid.400
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Old 10-01-2008, 07:19 PM
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what's the stroke and exact bore measurement?
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Old 10-01-2008, 07:42 PM
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401 cubic inches

stock 390 is 4.050 bore and 3.780 stroke
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Old 10-01-2008, 07:47 PM
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Bore X Bore X 0.7854 X stroke X number of cylinders =
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Old 10-01-2008, 07:51 PM
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(WOOPS) bad post....

Last edited by Alaskan Assassin; 10-01-2008 at 08:14 PM.
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Old 10-02-2008, 12:00 AM
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.060" Over ( Total Bore Increse)

Quote:
Originally Posted by va4cqd
401 cubic inches

stock 390 is 4.050 bore and 3.780 stroke
4.050 (Bore) / 2 = 2.025 (Rad.) X (Rad.) = 4.100625 X 3.14 (Pie.) = 12.8759625 Square " / Cyl . X 3.78 = 48.6713825 Cubic " / Cyl. X 8 = 389369106 (V-8) ...
4.050 + .060 = 4.110 (New Bore) / 2 = 2.055 (Rad.) X (Rad) = 4.223025
X 3.14 (Pie) = 13.2602985 (New Sq. In.) X 3.78 = 50.12392833 (Cu.In.) X 8
= 400.99142664 (Cu. In. V-8)
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Old 10-02-2008, 04:34 PM
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Quote:
Originally Posted by va4cqd
401 cubic inches
Cool
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