cubic inches formula question

[Hotrodharleyguy]

   good morning.... does anyone out there know( either the formula) or will do the math yourself and tell me what is the cubic inch size of my 127 cubic inch motor after it has been bored .020 oversize? The stock bore is 4.25 and the stock stroke is 4.50. so the new bore is now 4.27 while the stroke remains at 4.50. thanks in advance

[Rags722]

http://maxwedge.com/articles/cubes.php

There you go, they even give you the option to plug in stock numbers and then add in overbore or over stroke.

[FLTR2008Trike]

Big Boyz calculator >> http://www.bigboyzheadporting.com/TwinCamComp.htm

[PC_Hater]

length of the stroke x Pi x radius squared

Your stroke is 4.50 inches
Your bore is 4.27 inches so the radius is 2.135 inches
Pi is of course 3.14159

and so we have radius squared = 2.135 x 2.135 = 4.558225
time Pi = 14.32008, that is in square inches = the area of the piston
times the stroke = 64.40 cubic inches for one cylinder
= 128.880 cubic inches for two cylinders

Your engine started out as 127.676 cubic inches, you have gained 1.2 cubic inches.

[Hossamania]

Oh yeah, geometry. Who'd a thought that would come in handy after high school? (Sorry Preach, I mean grade school )

[prodrag1320]

thank god for calculators

[ultra 08]

test question witch holds more a 5 gal bucket or a cubic foot and how did you get your answer

[rigidthumper]

1 cubic foot container will hold ~ 7 gallons of liquid, but my 5 gal container has handles, so it's easier to carry 

[JBarrettB]

Bore x bore x stroke x .7854

I don't like pie...

JB

[ultra 08]

12x12x12=1728 divided by 231 =7.480519 gal     

[mrmike]

You guys are using up prime winter posting material, keep this up and we'll have to reincarnate the shorts/flip flops  thread next winter.



Mike

[76shuvlinoff]

pie R round, shortcake R square.

[rigidthumper]

Both are better with ice cream )

[FSG]

Apple is best   

Attached is a calc spreadsheet

[attachment removed after 60 days by system]

[KiwiRob]

Bore x bore x stroke x .7854

I don't like pie...

JB

As above, and multiple by number of cylinders. - Rob

[Snuff™]

I find it easier to just look at the badges:

"74" "80" "88" "96" "103" "110" "120R"     

No pie required!

[truck]

pie R round, shortcake R square.

Maybe this?
Jethro says, "Granny, today I learned that Pi are squared!"
Granny scoffs and retorts, "Why, everybody knows pie are round! Cornbread are square!"

[76shuvlinoff]