Installed a 997 GT3 Master Cylinder in my 996 C2
09-17-2018, 02:40 PM
#17
Thank you so much Nickshu for this Five Stars Topic.
And thanks a lot to Quadcammer that posted in my topic, the reference on yours.
I come from the 986 “chapter”, and have the exact same problem, i.e.: hate the “mushy brake pedal” feel of the OEM car.
(The only positive things of it, ..is the feeling that you have to bleed every track days !)
Note:
I have Brembo big brake kit on my Boxster (large floating rotors and 6 pistons calipers) and just want a FIRM (normal sport car) brake feel. I also got the feeling that the large calipers even made the feeling a little bit worse than the original !
By the way, ..after 30 years non stop of multi 911 (including 11 years of 996), you could not believe how great I feel about a Boxster. Nothing beat having the engine at the right position !
(..or: why I’m on the “986 Chapter” !)
After going for an install process of a TRW PMN166, ..I found the mismatch on outlet tubes !
(or, good for back to OEM and ..another full bleeding session !)
Thanks again, I think I may also go on adapter solution too.
(Or trying to get another line new or from a dismantler, and cut the bubble, remove the 10mm nut, to replace it by a “small” tube 12mm nut (made for 4.6mm tube)
(the “common” 12mm nuts seems to be designed for 5.8mm tubes) and rebuild the bubble.
This later solution would have the advantage to suppress the need of an adapter.
By the way, about this upgrade, I also observed during this tentative that the mounting of the GT3 M.C. on the booster is different at the level of the sealing between the booster and the MC : on the OEM MC, at least on the 986, the sealing is done the “axial way” with an O-Ring, while on the “GT3” one, the sealing is done in the “vertical plate”, facing the booster.
It seems to me that the sealing of the “GT3” model is much more logical !
Did you also found this difference on the 996 ? (or is this “typical” to the 986 ?)
Sorry for off topic, but for curiosity: a photo of my front brakes (sure, also PSS9) :
And thanks a lot to Quadcammer that posted in my topic, the reference on yours.
I come from the 986 “chapter”, and have the exact same problem, i.e.: hate the “mushy brake pedal” feel of the OEM car.
(The only positive things of it, ..is the feeling that you have to bleed every track days !)
Note:
I have Brembo big brake kit on my Boxster (large floating rotors and 6 pistons calipers) and just want a FIRM (normal sport car) brake feel. I also got the feeling that the large calipers even made the feeling a little bit worse than the original !
By the way, ..after 30 years non stop of multi 911 (including 11 years of 996), you could not believe how great I feel about a Boxster. Nothing beat having the engine at the right position !
(..or: why I’m on the “986 Chapter” !)
After going for an install process of a TRW PMN166, ..I found the mismatch on outlet tubes !
(or, good for back to OEM and ..another full bleeding session !)
Thanks again, I think I may also go on adapter solution too.
(Or trying to get another line new or from a dismantler, and cut the bubble, remove the 10mm nut, to replace it by a “small” tube 12mm nut (made for 4.6mm tube)
(the “common” 12mm nuts seems to be designed for 5.8mm tubes) and rebuild the bubble.
This later solution would have the advantage to suppress the need of an adapter.
By the way, about this upgrade, I also observed during this tentative that the mounting of the GT3 M.C. on the booster is different at the level of the sealing between the booster and the MC : on the OEM MC, at least on the 986, the sealing is done the “axial way” with an O-Ring, while on the “GT3” one, the sealing is done in the “vertical plate”, facing the booster.
It seems to me that the sealing of the “GT3” model is much more logical !
Did you also found this difference on the 996 ? (or is this “typical” to the 986 ?)
Sorry for off topic, but for curiosity: a photo of my front brakes (sure, also PSS9) :
Last edited by GVA-SFO; 09-17-2018 at 04:34 PM.
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imhighlander (01-19-2023)
09-17-2018, 06:56 PM
#18
By the way, about nice and easy mods, a simple one to try to help to keep brakes as cold as possible is OEM GT2 air ducts.
Available as Porsche parts (number on the photo) cost about 30 bucks and real easy to install (replace much smaller ones) !
Available as Porsche parts (number on the photo) cost about 30 bucks and real easy to install (replace much smaller ones) !
09-17-2018, 08:44 PM
#19
..back on topic :
Btw, two comments :
a) Strange, on the list of cars, ..it do not says GT3 for the PMN166 !!!!
b) It looks like “Brake Hoses Unlimited” on eBay has “THE” adapter :
Btw, two comments :
a) Strange, on the list of cars, ..it do not says GT3 for the PMN166 !!!!
b) It looks like “Brake Hoses Unlimited” on eBay has “THE” adapter :
09-17-2018, 11:33 PM
#20
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You bet guys! This is a pretty easy mod. Aside from getting the adapter setup it only took me about 1 hour to install and another hour to bleed. And on top of that it's a pretty inexpensive mod. Again I am surprised that there has not been much discussion about this on the 996 forum, the Cayman guys have been all over this upgrade for awhile now.
We had a few inches of snow today...I usually don't drive my car in snow, but couldn't resist....so I took it around the neighborhood, mostly sideways, and gave the PSM and ABS a good workout. No issues noted with the upgraded M/C and any of the PSM/ABS electronics. Just a way better pedal feel and much less travel.
I may have to adjust my adjustable Rennline gas pedal up a bit for heel and toe now. Aaaah champagne problems.
We had a few inches of snow today...I usually don't drive my car in snow, but couldn't resist....so I took it around the neighborhood, mostly sideways, and gave the PSM and ABS a good workout. No issues noted with the upgraded M/C and any of the PSM/ABS electronics. Just a way better pedal feel and much less travel.
I may have to adjust my adjustable Rennline gas pedal up a bit for heel and toe now. Aaaah champagne problems.
09-18-2018, 03:41 AM
#23
Rennlist Member
subbed.. this looks like a great option in my 99 C2..no PSM or anything, so I'm hoping it's an m12 front and rear port., I'll have to look at it after work... but with that adapter, either way is a breeze. 997 GT3 BMC is going on the list. Thanks for the how-to
09-18-2018, 10:29 AM
#24
Rennlist Member
09-18-2018, 10:36 AM
#25
RL Community Team
Rennlist Member
Rennlist Member
09-18-2018, 10:38 AM
#26
Three Wheelin'
Adapter:
https://www.ebay.ca/itm/Brake-Line-T...UAAOSwZVJaxivb
Here is the seller I found:
https://www.ebay.ca/usr/goodbrakes?_...p2047675.l2559
https://www.ebay.ca/itm/Brake-Line-T...UAAOSwZVJaxivb
Here is the seller I found:
https://www.ebay.ca/usr/goodbrakes?_...p2047675.l2559
09-18-2018, 10:39 AM
#27
RL Community Team
Rennlist Member
Rennlist Member
09-18-2018, 02:56 PM
#29
Sorry, you are right :
The easiest (on ebay) : eBay item number: 331605500736
The description line (title) is "Brake Line Thread Adapter, Male M12 x 1 Bubble, Female M10 x 1 Bubble"
and the vendor id is goodbrakes (14647 ) (100% Positive feedback)