Subaru hydraulic clutch time..., Need help from the gurus! Options

[Chris H.]

Hey all,

I'm at the point where the hydraulic clutch setup needs to be mapped out for my Subie conversion. The donor trans is from a 2006 WRX with a 13/16 slave cylinder. Initial reaction is to buy a 13/16 generic (wildwood or CNC) master cylinder so they match and give a “factory” clutch feel but after some internet searches it seems that pedal travel is also a factor and might mean a different size would be better. I’ve seen some GREAT hydraulic clutch threads but could not find one for the Subie trans setup.

I’d assume the pedal throw is probably similar but could be wrong. BIGKAT is using a 3/4 and mentioned he might rather have a 5/8. His trans likely has a ¾ slave.

Any insight or thoughts on this? You don't have to be right! Brainstorming is great too. (IMG:style_emoticons/default/biggrin.gif)

[904svo]

For years I had a clutch problem on my Subaru conversion, the car would grind the
gears when shifting. The problem turn out to be that the clutch master cylinder did
not have enough travel when the clutch pedal was press. The problem turn out to be I had to move the fulcrum point on the clutch pedal to the cylinder and add a 6 degree shim under the pedal to get full travel. Now it works great. Make sure that you measure the travel at the clutch fork with the clutch installed you will be surprise that under pressure things change!