[fro20]

quote by turtl631 on FA

F1/A1=F2/A2 is the equation that explains this. But if you haven't taken college physics, think of it like this- if you increase the area on the slave side (slave cylinder bore), the force applied to that piston also increases, all else (the master cylinder side) staying the same. So with the same foot input, there will be more force applied to the clutch TOB, so it will feel softer to you and not fatigue your leg so much.

quote by nissanfanatic on FA

Way overcomplicated....

Pressure, measured in forced applied over area, in itself will explain why a larger bore makes the clutch easier to depress. Increase the area of the cylinder, and increase the amount of forced applied, given pressure remains constant. 7 psi exerts 7lbs on one sqare inch of area. 7psi exerts 14lbs on two square inches of area.

quote by Epstein on FA

Exactly. Area goes up, applied force needed goes down. That's just force, though.

Seishuku is also right. This isn't like brakes, where line pressure is the big factor. The clutch system actually moves fluid. So the larger volume of the new slave will mean that it moves proportionally less than the stock slave per unit of master cylinder travel. So the same 15% lighter feel also gets you a 15% reduced throwout bearing travel. You'll probably be fine, but I have seen a related thread in the GT-R section on certain clutches that you shouldn't upgrade the slave with.