930 clutch pedal

[TonyL]

Hello,
I am using a late 930 gearbox [inverted] and want to adapt it to hydraulic clutch. I was wondering what other people had done about master/slave cylinder diameters, pedal ratios and if there is a need for a power booster? I have the wilwood pull type slave cylinder so far.

I see that Porsche had a booster on theirs for some model years and I have seen the geo storm booster adapted as a clutch booster. Any advice would be greatly appreciated.

cheers,

TonyL

 

[David Briggs]

If you have a pedal ratio of 4 1/2 to one and size the M/C appropriately you won't need a booster.

 

[Bill Musarra]

Tony,
I can tell you what dowesn't work. I have a 996 slave cylinder(push) and tried a 1" Tilton master with Tilton double pedal(floor mont). The ratio is 5.5:1. The pressure required would leave your leg looking like Popeye the Sailor. I don't remember the surface areas right off hand. I am now tring the 5/8". It should be a better match. I am also learning about JIC fittings and how to get them to work with double flares. Don't forgeet about using a pedal stop.

Bill