Engine Size and Cubic inch

[silicon212]

Originally Posted by 534BC

That's almost as bad as my pampered chef measuring cup.

Use a graduated cylinder, that way you can accurately measure your combustion chambers when you CC your cylinder heads!

Originally Posted by knightjp

As far as what I've heard, the engine displacement comes from the size of the cylinders in the block. How is it that it can be increased by adding aftermarket parts???

You can increase bore and stroke to obtain more cubic inches. Within reason - most blocks won't tolerate a serious overbore, and stroking much beyond 3/48" (stroke on Chevy SB 267/305/350) requires modification to the block and rods.

[jdmccright]

3/48"? Try to find a ruler with that marking on it. Try 1/16". LOL

[534BC]

Originally Posted by silicon212

Use a graduated cylinder, that way you can accurately measure your combustion chambers when you CC your cylinder heads!



You can increase bore and stroke to obtain more cubic inches. Within reason - most blocks won't tolerate a serious overbore, and stroking much beyond 3/48" (stroke on Chevy SB 267/305/350) requires modification to the block and rods.

Hi, the adjustable measuring cup isn't recommended as a device to measure swept volume or ccv , but rather was posted as a visual aid to demonstrate what "engine size" actually is. It is the "size of the cylinder" (I know you know this) It was for the OP.

[silicon212]

Originally Posted by jdmccright

3/48"? Try to find a ruler with that marking on it. Try 1/16". LOL

Oops, 3.48"

[sracing]

Originally Posted by knightjp

As far as what I've heard, the engine displacement comes from the size of the cylinders in the block. How is it that it can be increased by adding aftermarket parts???

The displacement of the engine can't be changed by aftermarket parts. (at least not "bolt-on parts" THe engine would have to be torn down to add real displacement. However, the effective volumetric efficiency can be changed. In effect the engine "think"s it's bigger. Different heads or piston can increase the compression ratio this can allow more air/fuel to enter the engine making more HP. Turbos or Superchargers can be added they do the same thing. Even Nirtrous Oxide (NO2) can be added with provides more O2 that can be mixed with fuel to increase the capabilty of the engine. In all of these cases, the engine "thinks" it bigger, but it still has the same displacement.