Just did my first brake change. Are you kidding in the rear caliper design?!?!?!?
03-07-2012, 08:10 PM
#17
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The Traction Control keeps applying brakes at the back independently by side, to get the car straight under braking and acceleration. I just learned that Fiat just put the same system in the 458 Italia, I'm glad my obsolete Scuderia doesn't ahve this, because it is messy for track use (eats pads too).
Porsche Motorsports has the studs. You'll get the ones from the GT3 Cup, neat and easy stuff, and pain will be gone.
Contact one of our Sponsors, and they would do the shopping and shipping to you, just pay the bill, cheap stuff. You can install them yourself, easy stuff too. Don't use thread locker of any type.
03-08-2012, 01:52 AM
#20
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The studs that I have are supplied by Porsche Motorsport, and are standard equipment on the Cup cars, as far as I understand, they are designed to have the calipers come on and off. I switched as I had a problem with my C2S where the caliper bolt stripped the threads on the knuckle while under heavy braking at the track. I managed to get the car into the pits without touching the brakes again, but as soon as I did, the caliper wedged into the wheel and did a bit of damage. I figure the $100 plus labour is cheap insurance against this happening again.
Porsche put more bias on the rear of the 997 GT3, using larger pistons in the caliper, the caliper is stiffer also, they knew they caliper was going to get abused with all the extra braking done by the electronics.
The Traction Control keeps applying brakes at the back independently by side, to get the car straight under braking and acceleration. I just learned that Fiat just put the same system in the 458 Italia, I'm glad my obsolete Scuderia doesn't ahve this, because it is messy for track use (eats pads too).
Porsche Motorsports has the studs. You'll get the ones from the GT3 Cup, neat and easy stuff, and pain will be gone.
Contact one of our Sponsors, and they would do the shopping and shipping to you, just pay the bill, cheap stuff. You can install them yourself, easy stuff too. Don't use thread locker of any type.
The Traction Control keeps applying brakes at the back independently by side, to get the car straight under braking and acceleration. I just learned that Fiat just put the same system in the 458 Italia, I'm glad my obsolete Scuderia doesn't ahve this, because it is messy for track use (eats pads too).
Porsche Motorsports has the studs. You'll get the ones from the GT3 Cup, neat and easy stuff, and pain will be gone.
Contact one of our Sponsors, and they would do the shopping and shipping to you, just pay the bill, cheap stuff. You can install them yourself, easy stuff too. Don't use thread locker of any type.
Any help greatly appreciated....
03-08-2012, 01:55 AM
#21
Nordschleife Master
Guys, how exactly are they fixed to the uprights? Is is permanent? That is, is there no chance of them backing out when one goes to undo the nuts? This is a must do in my opinion but here in Oz, nobody seems to know a thing aboutH these conversions kits and I'm told the cup cars just have different uprights... Happy to ship them from the US if I can find a supplier and some instructions on correct fitment...
Any help greatly appreciated....
Any help greatly appreciated....
03-08-2012, 03:01 AM
#23
GT3 player par excellence
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So I just got done with my first brake job. 99% of the brake work I have done is on mine (and friends) 6GT3s, Turbos and Carreras. Piece of cake on those cars.
However...........
The rear calipers on the 997 is absolutely the worst design. Is there a RATIONAL reason why they changed the design to make it where you need to remove the caliper to do a brake pad swap? I can see marginally stronger calipers with the two connecting pieces on top of the caliper but really, was lack of strength an issue???
And as far as these cars being designed for quick changes in the pits, this makes no sense and pretty much relegates all teams to QD brake lines and swapping entire assemblies instead of pads.
Rant over.....
However...........
The rear calipers on the 997 is absolutely the worst design. Is there a RATIONAL reason why they changed the design to make it where you need to remove the caliper to do a brake pad swap? I can see marginally stronger calipers with the two connecting pieces on top of the caliper but really, was lack of strength an issue???
And as far as these cars being designed for quick changes in the pits, this makes no sense and pretty much relegates all teams to QD brake lines and swapping entire assemblies instead of pads.
Rant over.....
there is a reason why i dont track 997's.
03-08-2012, 04:27 AM
#24
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The front calipers on a 991 are a simlar design to the 997 rears with the permanent bridge - they do look cool though, but will be a real pita for pad changes.
Everyone says to put studs, but someone PLEASE post a part number to use - although Steve Weiner says to use grade 12.9 studs, finding those in this country is proving tricky, and I would prefer to stick to porsche parts.
Everyone says to put studs, but someone PLEASE post a part number to use - although Steve Weiner says to use grade 12.9 studs, finding those in this country is proving tricky, and I would prefer to stick to porsche parts.
03-08-2012, 11:44 AM
#26
Three Wheelin'
Here is the info from the 2005 996 Cup parts catalog:
Front:
Fillister screw M12x1,5x85 - 999.067.047.09
Rear:
Stud - M12x1,5x70 - 999.062.271.09
Washer - 12mm - 900.031.002.09
Nut - Simmonds M12x1,5 - 900.817.004.02
Upon further inspection (search function in the pdf), it appears that these might be the part numbers from the 2009 997 Cup parts catalog:
Front:
Stud - M12x1,5 + M10x1,5 - 999.061.003.02
Hex nut - M10 - 999.076.083.01
Rear:
Stud - M12x1,5 + M10x1,5 - 999.061.004.02
Hex nut - M10 - 999.076.083.01
I did not see any information regarding related washers like I did in the 996 catalog.
Front:
Fillister screw M12x1,5x85 - 999.067.047.09
Rear:
Stud - M12x1,5x70 - 999.062.271.09
Washer - 12mm - 900.031.002.09
Nut - Simmonds M12x1,5 - 900.817.004.02
Upon further inspection (search function in the pdf), it appears that these might be the part numbers from the 2009 997 Cup parts catalog:
Front:
Stud - M12x1,5 + M10x1,5 - 999.061.003.02
Hex nut - M10 - 999.076.083.01
Rear:
Stud - M12x1,5 + M10x1,5 - 999.061.004.02
Hex nut - M10 - 999.076.083.01
I did not see any information regarding related washers like I did in the 996 catalog.
Last edited by IPguy; 03-09-2012 at 11:26 AM.
03-09-2012, 05:10 AM
#29
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IPGuy - thanks - now at least I have a start point, but I really need the rear studs part numbers off a 997 cup.. they replace a cap head screw 95mm long
What format do you have your cup parts catalogues in?
Thanks
Guy
What format do you have your cup parts catalogues in?
Thanks
Guy
03-09-2012, 06:04 AM
#30
Rennlist Member
Guy, if you have any luck, please let me know... I'll do same....