333pg333

I'm going to run a late model 997 Cup Calliper (ie 380mm rotor) on a 355mm Girodisk rotor. We are confident that we can make the Calliper work, but just wondering on the pads? Are they the same size pad between the 350mm and 380mm rotor versions? If not, are the ones for the 380mm rotor 'taller' from top to bottom as to take advantage of a larger swept area from hub to outside diameter of rotor?

333pg333

Nobody? Any clues who to ask?

v12man

Match your pads here to the car they come from here - should give you a few clues:

http://www.braketechnology.com/car.html

2707, 8004 and 8003 are pretty similar, just the pad thickness and height are marginally difference - see the details and pad drawings on this site too.

Hope that helps.

Guy

333pg333

Hey thanks Guy. Now all I need is to fine a similar site with tech drawings for the Callipers.

v12man

I could go with that idea of some tech drawings... - been searching the web for days, without any luck.

Except for mounting points, there does not seem to be any fundamental difference between front calipers for:

996 GT3 Mk2, 996 GT3 cup, 997 GT3 and 997 GT3 cup calipers (PCCB or iron rotors) and 997 Turbo and GT2 calipers - they all take the same pattern of brake pad, or some small variant of it - pagid 2707 and its varients, 8003 and 8004

There only fundamental difference seems to be the 2 mounting point varients - either +- 145mm on the 996 and 996 cups, as well 997 turbo, and the 225mm mount points on the 997pccb and cup cars - I am not sure but I think this mount is also used on the 380mm iron disk 997 mk2 RS

The only oddity is the early 997 pccb cars seem to use the 225mm mount point calipers and narrow mount point front wheel carriers - there is an adapter in PET that seems to bridge that mount point conversion - Guess I will find out soon enough if it works when I try to put 997 cup calipers onto my 996mk1 GT3.

Picture 1 is the narrow spaced caliper on the 996 gt3 mk2 and cup and 997 turbo - thanks John (911slow) - you can see the offset mount points it has clearly.

Picture 2 is the early 997 cup caliper with 225mm mount points - picture is triplezero's, calipers are now mine

Picture 3 is a cargraphic kit wit a brembo disk- what i believe is the conversion adapter 145 - 225mm is in the lower left - I have 2 of these on order from the USA - I hope they will work for me.

If you find some drawings, please let me know.

v12man

http://www.brembo.com/it/Auto/Racing...acing_2011.pdf

But I can't find the calipers - might be in an older catalog I guess.

TRD0524

As long as the caliper is a 997/Cup Caliper, the pads are all the same and will work.

Same part number works for 996 GT3/Cup too.

333pg333

Thanks a bunch V12man. Great posts. So it seems you're basically trying to do the same as I am. Put a later 997 Caliper onto a earlier model 350mm rotor?
I'm confidant the pad size won't be an issue and semi confidant that the caliper should work on a 355mm rotor. What say you guys?
Interestingly you'd think that one of the callipers showing in the Brembo catalogue would be applicable, but they all seem to have a pad that is 164mm wide, not the 190 wide that fits into the Porsche Brembo calliper.
Seems a lot different for some reason?

v12man

Caliper will work for sure on a 350mm rotor.

I am actually doing more than just changing the calipers - I plan to move up a rotor size too - from 330mm front and rear to 350 front and rear.

I am sure if you can find an older Brembo racing catalogue, you will find the tech drawings.

v12man

See this thread for pictures - post 4 and 5

https://rennlist.com/forums/996-gt2-...n-caliper.html

333pg333

Ha, that's funny. I know that guy with the Silver Rose coloured car / Yellow 6 pots from the 951 world. That is actually a pic from his pristine 951 that got written off which was sad.

So I think your main question then surrounds the mounting spacing, yes? I don't have that issue as someone is making up the adapters and custom hats to go with my spindles and Girodisc rotors.
I'm actually moving up from a similar sized rotor as yours with Big Reds to the 355mm one with the Cups. Rear, I'm leaving same size for now. 300mm. This is not for a rear engine car. What is your car?

v12man

Mounts/spacing not really an issue for me as I can get them made up locally, but I suspect I will be fine using 996Mk2 gt3 front disks and 997 Turbo/GT3 rears.

Car is a 996 Mk1 GT3 Clubsport - there are pictures on the 996GT3 board.

333pg333

Well hopefully we can both have success!!
Thanks again for your help. I'll let you know if I find out anything more.