Nthefamily
Forum Newbie
Posts: 86
Loc: North Ga.
Reg: 02-07-09
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06-24-12 06:20 PM - Post#2240927
I have acquired a 454 that has been bored .030 and looking to rebuild.
With it being bored .030, what is the cubic inch now?
What is the formula for figuring this?
Also I have a 327 SBC that has been bored .040. What now is the c.i.?
Thanks.
65 C10
85 Silverado 4x4
92 S10 |
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motorman
Super Senior Member
Posts: 5019
Loc: south western pa.
Reg: 01-25-00
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06-24-12 07:21 PM - Post#2240953
In response to Nthefamily
I have acquired a 454 that has been bored .030 and looking to rebuild.
With it being bored .030, what is the cubic inch now?
What is the formula for figuring this?
Also I have a 327 SBC that has been bored .040. What now is the c.i.?
Thanks.
bore X bore X .7854 X stroke X number of cylinders
| retired race engine builder,former NASCAR tech inspector. new corvettes owned 1959,1962,1963,1964,1965, 1966,1997,1999,2002,2005, 2008 plus 30+ other chevy cars and trucks along the way |
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66cayne
Frequent Contributor
Posts: 1802
Reg: 08-06-08
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06-25-12 06:15 AM - Post#2241076
In response to motorman
.030 454 with a stock crank is going to be a 461. The 327 will be a 333.
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 grumpyvette
Senior Chevytalk Moderator -- Performance Subject Matter Expert --
Posts: 15634
Age: 65
Loc: FLORIDA USA
Reg: 03-16-01
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06-25-12 09:27 AM - Post#2241119
In response to 66cayne
displacement formula
bore x bore x stroke x number of cylinders x .7854=displacement
in your case its
4.25 +.030 or 4.280"
so
4.280 x 4.280 x 4" x8 x .7854=460.4 cubic inches
http://forum.grumpysperformance.com/viewtopic.php?...
| " " IF YOU CAN'T SMOKE THE TIRES FROM A 60 MPH ROLLING START YOUR ENGINE NEEDS MORE WORK !" |
Edited by grumpyvette on 06-26-12 05:03 PM. Reason for edit: No reason given.
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motorman
Super Senior Member
Posts: 5019
Loc: south western pa.
Reg: 01-25-00
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06-25-12 12:15 PM - Post#2241170
In response to grumpyvette
displacement formula
bore x bore x stroke x number of cylinders x .7854=displacement
in your case its
4.25 +.030 or 4.280"
so
4.280 x 4.280 x 4" x8 x .7854=460.4 cubic inches
that is the formula that most all racing assoc. use
| retired race engine builder,former NASCAR tech inspector. new corvettes owned 1959,1962,1963,1964,1965, 1966,1997,1999,2002,2005, 2008 plus 30+ other chevy cars and trucks along the way |
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Nthefamily
Forum Newbie
Posts: 86
Loc: North Ga.
Reg: 02-07-09
|
 06-26-12 12:56 PM - Post#2241560
In response to motorman
Thank you folks for that information.
65 C10
85 Silverado 4x4
92 S10 |
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