Hello guys,
As many of you know, our cars have problems shifting fast once the clutch is upgraded. I was seeking for a solution since the past 2 years and I've come to the conclusion that our OEM master cylinder is unable to push fast enough the pressure plate of an upgraded clutch. My clutch is a Sachs Racing SMF with organic disc. What I did until now to selve the problem was : replaced the entire clutch under warranty, installed the 42DD solid shifter bushings, adjusted the shifter cables several times, installed a shortshifter wich I also adjusted several times, installed the USP SS clutch line, removed the flow restrictor (situated inside the T piece just behind the slave cylinder > the same piece used for clutch aeration). All of these had no success so a few month ago I sent a mail to Southbend wich suggested the hydraulic system of the car might be weak and not able to push fast enough the pressure plate. What amazes me is there are tens of aftermarket clutches but no one thought of upgrading the master cylinder althoungh there are upgrades for other makes like Evos, Bmws, Corvettes...While browsing on the internet I've come across the Ap Racing range of competition master cylinders >
http://www.apracing.com/info/index.asp?section=Master+Cylinders_2350 . Unfortunately, there are many types and many sizes for each type so I don't know if any of them would suit the mk5 Golf GTI and if it would cure the fast shifting problem. Any help would be appreciated !
