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View Full Version : how big is 30 over on 455


kcsteck
09-12-2005, 06:33 PM
can anone tell me how big is my 455 that is bored 30 over. I heard I think that 454 bord 30 over was 468 so is 455 bored over 469?
thanks,
Casey
Oldsquirt
09-12-2005, 07:26 PM
Olds 455 +.030" = 461 cu. in.
STV_Keith
09-13-2005, 08:02 AM
From my old BB Buick days, a 455 + .030" was 463 - but I'm not sure if the Buicks and Olds shared the same bore/stroke.
The formula is:
Bore x Bore x Stroke x #cylinders x .7854 = Cu In.
Some Kind Of Monster
09-13-2005, 09:25 AM
468 is a 454 Chev bored .060 over, not .030.
Oldsquirt
09-13-2005, 05:24 PM
468 is a 454 Chev bored .060 over, not .030.
Actually, if you do the math on a 454 + .060", you get 466.87. Not sure how it got rounded up to 468. Maybe it just sounds better than 467?
no_chrome
09-13-2005, 06:20 PM
Another formula for cylinder volume is:
Pi X Radius squared X Height = Volume of one cylinder