the stroke is the same, but the effect on the clutch fork will be different. difficult to explain, it'd be similar to shaving the trans case or shimming it to change the distance. the pushrod being adjustable won't change the lenght of the stroke, but it will change where the stroke happens. that may mean that you won't fully disengage the clutch ( i know, it's just a couple hundredths.).
#Vr6 o2j action clutch full#
So at 1.17:1 you may not get full actuation at the slave. Sorry for the excessive length, and if you already knew most of this. The mk4 units would also appear to have less fluid volume, which means either the spring assist is doing a lot of work, or the mk4 oem PP has less clamping force (or both). The mk4 pedal has a lot more spring assist than the mk3 unit, which has more lever action (master mounted above the fulcrum, versus below). You can take this as far as you want really, or strike things out you aren't changing, but you can use this data to figure out exactly how much foot pressure and travel will be needed to fully disengage the PP using any setup. The difference is in the leveraging and the clamping force of the PP.
Why does a mk4 and a mk3 clutch feel so different if the equation is balanced (both 1.19:1)?
Honestly not a lot, except that it'd be a bad idea to mix mk3 and mk4 hydraulic clutch parts, as you'd unbalance the equation and likely end up never getting your clutch to disengage or subject the slave to excessive hydraulic force, depending on how you mixed them. So you still need 1.19 units of travel at the master to get 1 unit of travel at the slave, and you will only need to apply 84% of the pressure at the master to get 100% of the pressure at the slave. The fun part is the ratio is the same between mk3 and mk4, the master is 84% of the size of the slave, or 16% smaller. To move the slave 1 unit, the master needs to move 1.19 units, and will do it at 84% of the pressure that is applied to the slave.Ģ2.22/18.62 = 1.1933 this is the ratio of movementġ8.62/22.22 = 0.8379 this is the pressure required at the master. Given a couple constants, here's a rudimentary start point:Ġ2A master is 16% smaller bore, or 84% of the size.
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