Stroked And Bored

[Coolman532]

What does it mean when someone says an engine is stroked and bored?

 

[Babbat]

What does it mean when someone says an engine is stroked and bored?

Stroking is increasing the crank's diameter so that you get more displacement. Say you have a 3" diameter crank that displaces 300 cubic inches. You change that crank, all things being the same, w/ a 4" crank, you now have an engine displacing 400 ci. This is an example btw, as it's more complicated than that Boring a cylinder is making the cylinder's "holes" bigger, effectively making the engine bigger.

 

[Solid Snake]

Babbat has the right idea. Stoke refers to the distance the piston travels within the cylinder (up and down motion). Increasing stroke means that you are increasing the ditance the piston is traveling in the cylinder. Increased stroke = more displacement and gobs of torque

Boring, as Babbat mentioned, is englarging the actual diameter of the cylinder itself.

 

[Coolman532]

Does it cost alot of money to stroke and bore the engine. And the (up and down motion) craked me up. Just like your sig.

 

[Babbat]

Does it cost alot of money to stroke and bore the engine. And the (up and down motion) craked me up. Just like your sig.

Stroking and boring can be done by most machine shops. For a stroke/bore, you need a new bottom-end kit (rings, pistons, crank, rods) and a shop to do the boring and possibly handle clearance issues w/ the rods considering your new stroke. The price will vary, depending on the shop and the new part you buy.

 

[Slow5.0]

stroked and bored mean you need 5.0 to do that right

 

[jadesville]

stroked and bored mean you need 5.0 to do that right

 

[StangVert00]

I think the words "Stroked and Bored" are in the Beach Boys song "Little Deuce Cuope". (I think) Correct?


StangVert00

 

[Bornstanger]

ahem....