Gus

Several master cylinder questions: -
1. Has anyone changed out a 993 master cylinder (23.8mm) for a Cayman master cylinder (25.8mm)?
2. Does anyone know the diameter of the 993 master cylinder and or the Cayman master cylinder portion that fits into the booster canister?
3. Does anyone know the length of the operational rod/shaft (static position) on either master cylinder that also slides into the booster canister ?
I am looking for a larger MC that I can adapt to the 993 booster canister with little modification. Someone has recommended the larger Cayman MC.
Thanks

Flatlined

Gus

Flatline - What year was your Cayman? Would you mind pulling a few measurements for me ?/ I need the length of the rod going into the booster from the flange on the MC. Need the diameter of the flange that marries to the booster also. Need this info to see if this really is and option and what changes can be made to mount.
Thanks for the reply and info - will be in touch.

Flatlined

T&T Racing

If the numbers are the diameter of the MC piston, going to a larger diameter MC piston reduces the brake pressure applied to the calipers by the ratio squared of the diameter with the smaller diameter as the numerator and the larger diameter as the denominator.