jfm

iTrader: (4)

More cubes come from more stroke.

The extra stroke is at the bottom of the bore?

The custom piston allows for correct deck height,but more stroke at the bottom of bore?

Example,stock crank at 3.622,offset cut to 3.722 would yield 355 cubes.The extra stroke would result from the piston being drawn down .100 more in the bore?

Am I on the right track here?TIA.

2001 Pewter WS6

iTrader: (43)

You get a longer stroke over all. Not just downward. The wrist pin is located closer to the top of the piston. If you put a stock piston on a stroker crank, it would come out the top of the cylinder wall. So in essence, you are increasing the total stroke .378" which is .189" up and .189" down. The location of the wristpin in reference to the top of the piston is higher to compensate to keep the pistin in the cylinder and to keep top dead center the same or very close to it.

2001CamaroGuy

iTrader: (6)

JFM is right in that the piston moves .378" (with a 4" crank) farther down the bore. The piston has always moved in the top 3.622" of the cylinder but with the stroker crank, the piston now travels farther down.

At the same time, Pewter is right in that you "center" the piston within that stroke (when the crank is a mid stroke, the piston will be 2" down the bore) and ballance with the pin location and rod length to prevent the piston from comming out the top of the bore.

jfm

iTrader: (4)

Thanks for the info.

Bear

iTrader: (1)

Someone have something cooking?

jfm

iTrader: (4)

Bear,for now The AS 2.5 heads and G5X2/3? will go on my LS1 block.

I have a stock crank that is offset cut for 355 CI that I may put in the new motor.