PF 08 Pads 7.1GT3 - Smaller contact patch?
Discussion
Hi Guys,
After taking some advice on how to move things on with my GT3, one of the first things was pads. Having now ordered and taken delivery of a set of Performance Friction PF 08 pads, I was surprised to find the contact patch to be smaller than the OEM pads.
I've read a few comments whereby there have been suggestions in swapping out road pads for track pads when the need occurs, but this will be impossible as there will then be a huge lip on the disc, preventing the road pad from seating correctly.
I've been assured by the vendor that the pads are correct (bar the hole for the sensor) and to carry on with fitting them.
I'm not happy 'tying up' the pad sensor wires (seems far too shady) and awaiting a new set with holes for sensors, but the issue with the contact patch remains.
I would really appreciate any feedback from members who have used the PF kits.
Thanks,
Stevie
After taking some advice on how to move things on with my GT3, one of the first things was pads. Having now ordered and taken delivery of a set of Performance Friction PF 08 pads, I was surprised to find the contact patch to be smaller than the OEM pads.
I've read a few comments whereby there have been suggestions in swapping out road pads for track pads when the need occurs, but this will be impossible as there will then be a huge lip on the disc, preventing the road pad from seating correctly.
I've been assured by the vendor that the pads are correct (bar the hole for the sensor) and to carry on with fitting them.
I'm not happy 'tying up' the pad sensor wires (seems far too shady) and awaiting a new set with holes for sensors, but the issue with the contact patch remains.
I would really appreciate any feedback from members who have used the PF kits.
Thanks,
Stevie
You have the "wrong" pad.
PFC used to only offer the 7819 pad shape which was equivelant to Pagid 8004. This shape is used on the later GT3 with bigger bells and is thus slightly smaller. PFC were using this shape as it cleared pretty much every rotor and worked across various disc sizes so offered what they felt to be a good solution.
PFC do however offer a 0991 shape now which matches the Pagid 2707 shape as used on the earlier cars. It's larger matching the factory pad for 997.1 GT3 (and 996.2 GT3) and thus wont clear all aftermarket rotors.
This is what you need if you want the full area of your stock disc covered.
Fwiw, you are fine to run the 7819, plenty people did for a long time before demand forced the other shape but its an inelegant solution if the larger pad shape clears.
Ref the sensors. They will probably melt with track use anyways. They are redundant with pagids since they need binned at about 50% worn however I hear the PFC are good all the way down to the plate. I haven't tried them however.
PFC used to only offer the 7819 pad shape which was equivelant to Pagid 8004. This shape is used on the later GT3 with bigger bells and is thus slightly smaller. PFC were using this shape as it cleared pretty much every rotor and worked across various disc sizes so offered what they felt to be a good solution.
PFC do however offer a 0991 shape now which matches the Pagid 2707 shape as used on the earlier cars. It's larger matching the factory pad for 997.1 GT3 (and 996.2 GT3) and thus wont clear all aftermarket rotors.
This is what you need if you want the full area of your stock disc covered.
Fwiw, you are fine to run the 7819, plenty people did for a long time before demand forced the other shape but its an inelegant solution if the larger pad shape clears.
Ref the sensors. They will probably melt with track use anyways. They are redundant with pagids since they need binned at about 50% worn however I hear the PFC are good all the way down to the plate. I haven't tried them however.
Edited by fioran0 on Thursday 14th March 01:10
Also have a gap with the latest PF 08 pad with aftermarket disc, however, it's on the inside near the bell and not the outer lip.
The PF is not quite as wide as Pagid but the calliper spacers lift the calliper away from the bell leaving a small gap which is not a prob at all.
The cable sensors are just a hindrance and for years just cable tie it off to steel brake line. Lately I've taken to cutting them just short enough to solder the two wires together and heat shrinking the ends up close to the connector. If you need a dashboard indicator to tell you your pads are wearing down you're not really paying attention now are you.
The PF is not quite as wide as Pagid but the calliper spacers lift the calliper away from the bell leaving a small gap which is not a prob at all.
The cable sensors are just a hindrance and for years just cable tie it off to steel brake line. Lately I've taken to cutting them just short enough to solder the two wires together and heat shrinking the ends up close to the connector. If you need a dashboard indicator to tell you your pads are wearing down you're not really paying attention now are you.
Yes mate , get the sensor wires tie wrapped out the way. Nothing shady about it. Common sense and saves a couple of quid if you want to reinstate them later. If you are swapping pads regularly you dont need a light on the dash to tell you they are getting low.
I can only echo the above comments re the aftermarket pad size which in your case sounds like the wrong pad.
I can only echo the above comments re the aftermarket pad size which in your case sounds like the wrong pad.
fioran0 said:
You have the "wrong" pad.
PFC used to only offer the 7819 pad shape which was equivelant to Pagid 8004. This shape is used on the later GT3 with bigger bells and is thus slightly smaller. PFC were using this shape as it cleared pretty much every rotor and worked across various disc sizes so offered what they felt to be a good solution.
PFC do however offer a 0991 shape now which matches the Pagid 2707 shape as used on the earlier cars. It's larger matching the factory pad for 997.1 GT3 (and 996.2 GT3) and thus wont clear all aftermarket rotors.
This is what you need if you want the full area of your stock disc covered.
Fwiw, you are fine to run the 7819, plenty people did for a long time before demand forced the other shape but its an inelegant solution if the larger pad shape clears.
Ref the sensors. They will probably melt with track use anyways. They are redundant with pagids since they need binned at about 50% worn however I hear the PFC are good all the way down to the plate. I haven't tried them however.
Fioran0, top advice as always. PFC used to only offer the 7819 pad shape which was equivelant to Pagid 8004. This shape is used on the later GT3 with bigger bells and is thus slightly smaller. PFC were using this shape as it cleared pretty much every rotor and worked across various disc sizes so offered what they felt to be a good solution.
PFC do however offer a 0991 shape now which matches the Pagid 2707 shape as used on the earlier cars. It's larger matching the factory pad for 997.1 GT3 (and 996.2 GT3) and thus wont clear all aftermarket rotors.
This is what you need if you want the full area of your stock disc covered.
Fwiw, you are fine to run the 7819, plenty people did for a long time before demand forced the other shape but its an inelegant solution if the larger pad shape clears.
Ref the sensors. They will probably melt with track use anyways. They are redundant with pagids since they need binned at about 50% worn however I hear the PFC are good all the way down to the plate. I haven't tried them however.
Edited by fioran0 on Thursday 14th March 01:10
My main concern with the sensors is when the car goes back to Porsche for warranty renewal and end up being forced to change the pads/sensors before they'll renew. And all at OPC prices to boot. No thanks!
Makes sense for the pad to be made to clear the bells on a floating disc. As long as I won't have any issues running them on std discs, I'm not too fussed about a lip on the inside of the disc.
Thanks again,
Stevie
bobsan said:
Also have a gap with the latest PF 08 pad with aftermarket disc, however, it's on the inside near the bell and not the outer lip.
The PF is not quite as wide as Pagid but the calliper spacers lift the calliper away from the bell leaving a small gap which is not a prob at all.
The cable sensors are just a hindrance and for years just cable tie it off to steel brake line. Lately I've taken to cutting them just short enough to solder the two wires together and heat shrinking the ends up close to the connector. If you need a dashboard indicator to tell you your pads are wearing down you're not really paying attention now are you.
Hi Bob,The PF is not quite as wide as Pagid but the calliper spacers lift the calliper away from the bell leaving a small gap which is not a prob at all.
The cable sensors are just a hindrance and for years just cable tie it off to steel brake line. Lately I've taken to cutting them just short enough to solder the two wires together and heat shrinking the ends up close to the connector. If you need a dashboard indicator to tell you your pads are wearing down you're not really paying attention now are you.
With you on the sensors. The std pads that were in the car are only around half worn (even after 13,000miles!), but heat has killed them. They don't make a sensor for that!
Not sure I'm into cutting the wiring just yet though!!
Thanks for the input
Stevie, no problems. If you are getting the pads changed anyways then you should try and have 0991 sent instead. This will let you use your full rotor face. The ones you have though will work fine if you can't swap. As I said, it was the only option for everyone until recently.
TTdan, assuming 996/997.1 6 pots then you want 0991 shape fronts. I checked with ade and the standard pad shape clears his Alcons fine. I run floating brembos and standard pad clears these too. There's only a few rotors have issues and need the space.
TTdan, assuming 996/997.1 6 pots then you want 0991 shape fronts. I checked with ade and the standard pad shape clears his Alcons fine. I run floating brembos and standard pad clears these too. There's only a few rotors have issues and need the space.
Its 997.2 6 pots with alcon. RS29's are nearly done. These have a gap to the bell of about 4mm and a gap to the edge of the disc of about ~ 1mm. Trouble is that there's now a lip on the disc.
I am thinking either, get the smaller PF and just carry on or get the larger PF and get the lip skimmed down on the discs. I do have an old set of PF 7819 profile that i can try, if these fit in the "slot" so to speak then that may be the easiest solution for a poofteenth of braking compromise. I do like the pad to use all the disc tho...
I am thinking either, get the smaller PF and just carry on or get the larger PF and get the lip skimmed down on the discs. I do have an old set of PF 7819 profile that i can try, if these fit in the "slot" so to speak then that may be the easiest solution for a poofteenth of braking compromise. I do like the pad to use all the disc tho...
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