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Clutch pedal length and master cylinders

Posted: Mon Jan 18, 2016 3:19 am
by Fkyx
Hello friends!

So I'm in the market for a new clutch master cylinder, which in general should be pretty easy to get a hold of. Long story short (read the whole story here: http://bbs.legacycentral.org/viewtopic.php?f=7&t=54735) I've gotten really used to a "short" clutch pedal. By that I mean that the clutch pedal does not normally come out past about flush with the dead pedal in my car due to the issues described in the aforementioned post. It also grabs nice and firmly without a whole lot of movement "letting the pedal out" from its fully depressed position. I **really** like it that way.

I'm worried, though, that buying a standard master cylinder for the car will result in a very standard clutch pedal, which not only will take more time to get used to, but ultimately, not feel ergonomically correct for me.

Are there options out there that would allow me to have the same sort of "short" pedal feel? Or maybe some adjustments I could make at the pedal or on the new MC to do it?

Thanks,
Matthew

Re: Clutch pedal length and master cylinders

Posted: Mon Jan 18, 2016 3:32 am
by mike-tracy
The rod that goes through the firewall can be screwed in/unscrewed a bit to change the engagement point. I always adjust mine to get what i consider a good pedal feel so i can empathize.

Re: Clutch pedal length and master cylinders

Posted: Mon Jan 18, 2016 6:22 pm
by Legacy777
A larger master and smaller slave will increase effort but decrease the pedal throw, but I don't think it'll be as substantial as what you have now.

Re: Clutch pedal length and master cylinders

Posted: Thu Jan 21, 2016 7:20 pm
by Fkyx
Legacy777 wrote:A larger master and smaller slave will increase effort but decrease the pedal throw, but I don't think it'll be as substantial as what you have now.
A mechanic friend had told me a larger bore in the master would result in a shorter pedal throw, but I didn't think about the slave, too. The only question is how common is it to find such things for our cars?

Re: Clutch pedal length and master cylinders

Posted: Sat Jan 23, 2016 11:11 pm
by Legacy777
There are slight differences in bore sizes between other subarus, however it's not going to be that much different. You would have to see what sizes are available and then you could do the calculations to see how it might affect things.

My brake math spreadsheet does this for brake pedal travel and different caliper piston sizes. You can use that as a starting point.

http://main.experiencetherave.com/subar ... kemath.xls