Spring is almost here in northern VT. Time to think about an upgrade or two for my
Cayman S
. I have been reading about people installing the GT 3 Brake master cylinder and stainless brake lines. The results spoken about are firmer pedal and less travel. Both of these appeal to me. I find the stock setup to give me too soft a pedal and too much travel.
Looking at options for the cylinder itself I see several choices. I want to be sure that it is an actual
GT3
cylinder, So, I am looking for any and all advice and comments regarding the swap. Good idea? Experience with it/results? Where and what to purchase etc?
Thanks all.
I think it’s a fantastic idea to swap in the
GT3
master cylinder. The brake pedal feel improves dramatically. In my opinion it brings you closer to the driving experience. More connected.
I used the TRW one rather than
Porsche
. I’m pretty sure TRW is the OEM. It has worked very well and trouble free. I did the stainless lines as well. Goodridge. Good quality that fit without any hassle.
Excellent feedback. Very helpful. Thank you.
I did it on my 2010 S and I agree it's a nice upgrade. The stock brake pedal was a bit long and mushy feeling, this tightened it up without being too harsh for the street. The OEM one I pulled out was TRW as well. Just make sure you buy the right part number and you should be fine: they look the same externally but have different bore diameters.
When replacing brake hoses I generally upgrade to stainless on all my cars because they're durable and not that expensive. That said I'm not convinced rubber hoses expand that much under braking and I've never noticed any significant difference going from rubber to stainless. But if your original hoses are 17 years old at this point they're probably due anyway.
One tip: when installing the new master cylinder get it all hooked up but leave the two hoses that connect to it screwed in but loose. Then fill the reservoir and wait a bit, and once fluid starts coming out of each fitting only then tighten the two hoses. The outlet ports on the MC are at the top of the cylinder, so if you do it this way the master will self-bleed and it'll minimize the amount of air you push into the system when doing the final bleed at the wheels. This may help you avoid having to use an OBD tool to bleed the ABS pump.
I, also, put a TRW (PMN166) in my
987.2
. I guess it feels nicer. In any case, make sure you have a way to bleed the abs as you could introduce air into it.
Thank you for the helpful reply. Do you happen to know the correct part number of the master cylinder?
As stated above the TRW number is PMN166. If you want the
Porsche
number I can find that one as well.
No need. I believe I will go with the recommended TRW PMN166. Seems that is the way to go. All this feedback is very helpful.
