350, 355, 358?
Burning Brakes
Joined: Jul 2006
Posts: 943
Likes: 3
From: Chicago IL
Originally Posted by Glensgages
bore x bore x stroke x #-of-cylinders x .7854
4.06 x 4.06 x 3.48 x 8 x .7854 = 360.42 CID
4.06 x 4.06 x 3.48 x 8 x .7854 = 360.42 CID
Last edited by curtis74; Nov 18, 2006 at 05:29 AM.
Race Director
Joined: Jan 2003
Posts: 15,176
Likes: 87
From: State of Confusion
Originally Posted by curtis74
That's go info to know! Thanks................
Really, just simple math..... the .7854 is a factor, going from a square-to-round:
a 4" by 4" square has an area of 16 square-inches (4 x 4 ), but the area of a circle 4" across (diameter ) is .7854 of that area (figuing-off the 4 corners with rounded- 'inards', if that is a word ).
Thread Starter
Burning Brakes
Joined: Aug 2005
Posts: 751
Likes: 0
From: Lufkin Texas
How about I just ask you? Math is not my subject.
Really, just simple math..... the .7854 is a factor, going from a square-to-round:
a 4" by 4" square has an area of 16 square-inches (4 x 4 ), but the area of a circle 4" across (diameter ) is .7854 of that area (figuing-off the 4 corners with rounded- 'inards', if that is a word ).
Originally Posted by Glensgages
Really, just simple math..... the .7854 is a factor, going from a square-to-round:
a 4" by 4" square has an area of 16 square-inches (4 x 4 ), but the area of a circle 4" across (diameter ) is .7854 of that area (figuing-off the 4 corners with rounded- 'inards', if that is a word ).
Le Mans Master
Joined: Sep 2001
Posts: 7,739
Likes: 630
From: Unreconstructed, South Carolina
There's always something; 360" or 361"?
Here's a possible anomoly:
Speed Pro aka Sealed Power aka Federal Mogul lists sbc 350 displacements with their pistons as follows:
CAST
4"std 350
+20 353
+30 355
+40 357
+60 361
but ...
FORGED
4"std 350
+20 353
+30 355
+40 356
+60 360
Yes I can calculate too ... but
a misprint or rounding error or significant figure or?
Bottom line ... 1" don't mean squat in a street car.
Speed Pro aka Sealed Power aka Federal Mogul lists sbc 350 displacements with their pistons as follows:
CAST
4"std 350
+20 353
+30 355
+40 357
+60 361
but ...
FORGED
4"std 350
+20 353
+30 355
+40 356
+60 360
Yes I can calculate too ... but
a misprint or rounding error or significant figure or?Bottom line ... 1" don't mean squat in a street car.
