Hydraulic press cylinder

4 x 4 x .7854 = 12.5664 sq.in. x 2 cylinders =25.1328 sq.in. x 2000 psi =50265.6 lbs force

2 x 2 x .7854 = 3.1416 sq.in. x 4 cylinders = 12.5664 sq.in. x 2000 psi = 25132.8 lbs force

One 8" cylinder at 2000psi will give you 50 tons force
Two 4" cylinders at 2000psi will give you 25 tons force
four 2" cylinders at 2000psi will give you 12.5 tons force

The pressures gitten to me.

usually cylinders are connected in series when you need both cylinders to expend at the same rates with unequal loads. (there are several ways to ensure this with different series setups)

as a note, in the parr. setup, just because the two cylinders are the same size does not mean that the cylinders will expend at the same time or rate. even a few pounds more force or friction on one cylinder will ensure that its twin will extend first. you will need mechanical structure to synconize the two cylinders.

About the same as installing a bigger cylinder - more surface area for the 2000psi fluid to push against.

In a series hookup, the 2 cylinders will offer the same total pressure, but extend 2wce as far....

No one has said yet, most press frames are built for a certain rating, doubling the pressure may likely result in a wrecked press. :)

--->Paul