11-09-2011, 11:14 AM
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#1
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Registered User
Join Date: Aug 2009
Location: Music City U.S.A.
Posts: 166
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GiroDisc Performance Brakes, Boom
Pulled the trigger on a set of front GiroDisc rotors this morning courtesty of the kind folks over at Road Sport Supply/Stuttgart Performance. As per the norm, Bryan was an absolute delight to deal with. I opted for the set of slotted/drilled rotors. They are 340mm vs 317mm OE rotors (8 % larger) and will net me a weight savings of 2.6 LBS per corner, which collectively is 5.2 LBS of saved rotating mass. Upon arrival (Thursday at the very latest), I will upload snapshots of the rotors. Alongside a comparison analysis in size and weight when installed (supplemented with photographs). Included below is a stock image of what the rotors will look like.
Stay tuned for more!
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2003 Porsche Boxster S 3.2L l AASCO Lightweight Flywheel l FVD Brombacher ECU l FVD Brombacher 100 Cell Sport Catalytics l FVD Brombacher Sport Headers l GiroDisc 340mm FR Rotors l IPD Intake Plenum l Litronics l KW Variant 3 Coilovers l Porsche 997 75mm Throttle Body l Road Sport Supply Underdrive Pulley Kit l Sachs Stage 2 Racing Clutch Kit l TechArt Short Shift Kit l TechArt Power Flow Kit l TechArt Sport Exhaust.
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11-09-2011, 11:28 AM
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#2
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Registered User
Join Date: Apr 2010
Location: Canada
Posts: 3,121
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'Boom' or 'Ka-ching'?
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11-09-2011, 11:30 AM
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#3
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Registered User
Join Date: Aug 2009
Location: Music City U.S.A.
Posts: 166
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Quote:
Originally Posted by The Radium King
'Boom' or 'Ka-ching'?
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Boom, sir. My mod list screams, ka-ching.
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2003 Porsche Boxster S 3.2L l AASCO Lightweight Flywheel l FVD Brombacher ECU l FVD Brombacher 100 Cell Sport Catalytics l FVD Brombacher Sport Headers l GiroDisc 340mm FR Rotors l IPD Intake Plenum l Litronics l KW Variant 3 Coilovers l Porsche 997 75mm Throttle Body l Road Sport Supply Underdrive Pulley Kit l Sachs Stage 2 Racing Clutch Kit l TechArt Short Shift Kit l TechArt Power Flow Kit l TechArt Sport Exhaust.
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11-09-2011, 11:37 AM
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#4
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Registered User
Join Date: Aug 2009
Location: Music City U.S.A.
Posts: 166
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Quote:
Originally Posted by The Radium King
'Boom' or 'Ka-ching'?
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As a frame of reference, my vehicle is now in the process of being converted to what will be a track only vehicle. Hence me shelling out a bit more coin for brakes now, as they are needing to be replaced. Versus replacing my brakes now with OE fitments and THAN buying the GiroDisc's. In 6-8 months a new addition will be added to the stable. Hello, 996 TT!
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2003 Porsche Boxster S 3.2L l AASCO Lightweight Flywheel l FVD Brombacher ECU l FVD Brombacher 100 Cell Sport Catalytics l FVD Brombacher Sport Headers l GiroDisc 340mm FR Rotors l IPD Intake Plenum l Litronics l KW Variant 3 Coilovers l Porsche 997 75mm Throttle Body l Road Sport Supply Underdrive Pulley Kit l Sachs Stage 2 Racing Clutch Kit l TechArt Short Shift Kit l TechArt Power Flow Kit l TechArt Sport Exhaust.
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11-09-2011, 03:43 PM
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#5
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Carnut
Join Date: May 2010
Location: Utah
Posts: 775
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You mentioned the rotors are 340mm vs 317mm, how will they fit?? Caliper brackets change? Please educate me!
Thanks,
Andy
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'14 Boxster
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11-09-2011, 04:23 PM
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#6
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Registered User
Join Date: Jun 2007
Location: Littleton, CO
Posts: 456
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Did you look at the PFC two-piece rotors? If so, how do these compare? I'm planning on getting the PFC rotors in the spring.
I'm not sure why one would want larger rotors. It seems to me like the OEM braking system works very well with race pads, and lightening the rotor hats would benefit more than larger diameter rotors. The stock rotor size is already pretty big for such a small car. What's your take on this?
__________________
"Of all the extreme sports I've ever participated in- windsurfing, kite boarding, wake boarding, tow-in surfing and snowboarding- skiing, for me, made everything else easy."
-Chuck Patterson
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11-10-2011, 07:45 AM
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#7
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Registered User
Join Date: Aug 2009
Location: Music City U.S.A.
Posts: 166
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Quote:
Originally Posted by AndyA6
You mentioned the rotors are 340mm vs 317mm, how will they fit?? Caliper brackets change? Please educate me!
Thanks,
Andy
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Spot on. They require a 12mm spacer (of which are included in the set) to move the caliper further away from the arm to accomodate the larger rotor. Longer caliper bolts are required and included as well.
__________________
2003 Porsche Boxster S 3.2L l AASCO Lightweight Flywheel l FVD Brombacher ECU l FVD Brombacher 100 Cell Sport Catalytics l FVD Brombacher Sport Headers l GiroDisc 340mm FR Rotors l IPD Intake Plenum l Litronics l KW Variant 3 Coilovers l Porsche 997 75mm Throttle Body l Road Sport Supply Underdrive Pulley Kit l Sachs Stage 2 Racing Clutch Kit l TechArt Short Shift Kit l TechArt Power Flow Kit l TechArt Sport Exhaust.
Last edited by Cartel; 11-10-2011 at 07:49 AM.
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11-10-2011, 07:49 AM
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#8
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Registered User
Join Date: Aug 2009
Location: Music City U.S.A.
Posts: 166
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Quote:
Originally Posted by Pat
Did you look at the PFC two-piece rotors? If so, how do these compare? I'm planning on getting the PFC rotors in the spring.
I'm not sure why one would want larger rotors. It seems to me like the OEM braking system works very well with race pads, and lightening the rotor hats would benefit more than larger diameter rotors. The stock rotor size is already pretty big for such a small car. What's your take on this?
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I am not versed on PFC's rotors. With that said, I cannot speak in that capacity. On the other hand, the GiroDisc's are in fact lighter AND larger than OE.
__________________
2003 Porsche Boxster S 3.2L l AASCO Lightweight Flywheel l FVD Brombacher ECU l FVD Brombacher 100 Cell Sport Catalytics l FVD Brombacher Sport Headers l GiroDisc 340mm FR Rotors l IPD Intake Plenum l Litronics l KW Variant 3 Coilovers l Porsche 997 75mm Throttle Body l Road Sport Supply Underdrive Pulley Kit l Sachs Stage 2 Racing Clutch Kit l TechArt Short Shift Kit l TechArt Power Flow Kit l TechArt Sport Exhaust.
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11-10-2011, 08:03 AM
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#9
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Registered User
Join Date: Aug 2009
Location: Music City U.S.A.
Posts: 166
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Per my original post, my GiroDisc rotors arrived 1st in the morning. Beautifully, well made pieces. I simply cannot wait to have them installed. At this point, I am awaiting the arrival of my GiroDisc (Front + Rear) stainless steel lines, Pagid RS19's (yellow), and rear OEM cross drilled rotors. In all likelihood, it will be 1-2 weeks prior to installation as my schedule at work is a bit erratic as of late. Suffice it to say, I could not be happier with my decision. One step closer to seeing track time! Many a thanks to Road Sport Supply/Stuttgart Performance for squaring me away as usual!
Prior to the days end, I publish the weights and diameter of the rotors. Stay tuned!
__________________
2003 Porsche Boxster S 3.2L l AASCO Lightweight Flywheel l FVD Brombacher ECU l FVD Brombacher 100 Cell Sport Catalytics l FVD Brombacher Sport Headers l GiroDisc 340mm FR Rotors l IPD Intake Plenum l Litronics l KW Variant 3 Coilovers l Porsche 997 75mm Throttle Body l Road Sport Supply Underdrive Pulley Kit l Sachs Stage 2 Racing Clutch Kit l TechArt Short Shift Kit l TechArt Power Flow Kit l TechArt Sport Exhaust.
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11-10-2011, 08:05 AM
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#10
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Registered User
Join Date: May 2008
Location: Toronto
Posts: 2,656
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It's lighter because it's got holes in it! j/k! :-)
With GiroDisc you must use 18" wheels and not all 18" wheels will fit.
PFC rotor hats are made of steel and not aluminum. You need to have them coated for winter driving. Other advantage is the rotors are dimpled instead of cross-drilled so the rotors will not crack.
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11-10-2011, 10:08 AM
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#11
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Registered User
Join Date: Aug 2009
Location: Music City U.S.A.
Posts: 166
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Quote:
Originally Posted by ekam
It's lighter because it's got holes in it! j/k! :-)
With GiroDisc you must use 18" wheels and not all 18" wheels will fit.
PFC rotor hats are made of steel and not aluminum. You need to have them coated for winter driving. Other advantage is the rotors are dimpled instead of cross-drilled so the rotors will not crack.
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Great information. Thank you for that. Upon glance, the PFC 2-piece rotors look fantastic! In regards to wheel fitment issues, there will not be a discrepancy with the 18" Carrera Lightweights I am running. Nor will there be when it comes time to order Champion RG5's.
__________________
2003 Porsche Boxster S 3.2L l AASCO Lightweight Flywheel l FVD Brombacher ECU l FVD Brombacher 100 Cell Sport Catalytics l FVD Brombacher Sport Headers l GiroDisc 340mm FR Rotors l IPD Intake Plenum l Litronics l KW Variant 3 Coilovers l Porsche 997 75mm Throttle Body l Road Sport Supply Underdrive Pulley Kit l Sachs Stage 2 Racing Clutch Kit l TechArt Short Shift Kit l TechArt Power Flow Kit l TechArt Sport Exhaust.
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11-10-2011, 06:51 PM
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#12
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Registered User
Join Date: Mar 2007
Location: los angeles
Posts: 193
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Quote:
Originally Posted by Cartel
As a frame of reference, my vehicle is now in the process of being converted to what will be a track only vehicle. Hence me shelling out a bit more coin for brakes now, as they are needing to be replaced.
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Speaking of coinage, how much coinage?
Is it possible to get these hats for stock front rotors?
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11-10-2011, 07:26 PM
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#13
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Registered User
Join Date: Jun 2007
Location: Littleton, CO
Posts: 456
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Quote:
Originally Posted by ekam
It's lighter because it's got holes in it! j/k! :-)
With GiroDisc you must use 18" wheels and not all 18" wheels will fit.
PFC rotor hats are made of steel and not aluminum. You need to have them coated for winter driving. Other advantage is the rotors are dimpled instead of cross-drilled so the rotors will not crack.
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Interesting. I spoke with PFC regarding year-round durability in Colorado. They said nothing about having the hats coated. They did say some people choose to coat the hardware, but that it was not necessary. Do you think they're not being honest with me?
__________________
"Of all the extreme sports I've ever participated in- windsurfing, kite boarding, wake boarding, tow-in surfing and snowboarding- skiing, for me, made everything else easy."
-Chuck Patterson
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11-10-2011, 07:29 PM
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#14
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Registered User
Join Date: Jun 2007
Location: Littleton, CO
Posts: 456
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Quote:
Originally Posted by Cartel
I am not versed on PFC's rotors. With that said, I cannot speak in that capacity. On the other hand, the GiroDisc's are in fact lighter AND larger than OE.
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Wow, those are beautiful. Lighter AND larger is a great combination. That said, the PFCs are significantly lighter than OEM, and I'm guessing significantly lighter than the Giros. I look forward to seeing what they weigh in at. Since I'm not really racing and it's my DD, I don't anticipate needing any more braking power than track pads and OEM-sized rotors. But it is nice to know there are other options out there. Cheers!
__________________
"Of all the extreme sports I've ever participated in- windsurfing, kite boarding, wake boarding, tow-in surfing and snowboarding- skiing, for me, made everything else easy."
-Chuck Patterson
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11-11-2011, 09:41 AM
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#15
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Registered User
Join Date: May 2008
Location: Toronto
Posts: 2,656
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Quote:
Originally Posted by Pat
Interesting. I spoke with PFC regarding year-round durability in Colorado. They said nothing about having the hats coated. They did say some people choose to coat the hardware, but that it was not necessary. Do you think they're not being honest with me?
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Perhaps Colorado don't have a lot of salt on the road in winter, but I don't think you'll have that problem if the hats are aluminum, or if that's your summer only car.
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11-14-2011, 06:50 AM
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#16
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Registered User
Join Date: Aug 2009
Location: Music City U.S.A.
Posts: 166
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Quote:
Originally Posted by brp987
Speaking of coinage, how much coinage?
Is it possible to get these hats for stock front rotors?
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In terms of coin, various packages start at $2,200 for a set of four depending on ths specifications. In regards to acquiring the hats for stock rotors, I am unsure if that can be done. Your best bet is to contact Road Sport Supply directly. Included below is there contact information if you are interested.
Road Sport Supply/Stuttgart Performance
714.545.1046
714.432.8815
sales@roadsportsupply.com
__________________
2003 Porsche Boxster S 3.2L l AASCO Lightweight Flywheel l FVD Brombacher ECU l FVD Brombacher 100 Cell Sport Catalytics l FVD Brombacher Sport Headers l GiroDisc 340mm FR Rotors l IPD Intake Plenum l Litronics l KW Variant 3 Coilovers l Porsche 997 75mm Throttle Body l Road Sport Supply Underdrive Pulley Kit l Sachs Stage 2 Racing Clutch Kit l TechArt Short Shift Kit l TechArt Power Flow Kit l TechArt Sport Exhaust.
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11-14-2011, 07:00 AM
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#17
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Registered User
Join Date: Sep 2009
Location: toronto
Posts: 2,668
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Did they say what the rotor hat material is?? Oem tends to rust a bit. Will the parking brake work with them on rear rotors?
Quote:
Originally Posted by Cartel
Per my original post, my GiroDisc rotors arrived 1st in the morning. Beautifully, well made pieces. I simply cannot wait to have them installed. At this point, I am awaiting the arrival of my GiroDisc (Front + Rear) stainless steel lines, Pagid RS19's (yellow), and rear OEM cross drilled rotors. In all likelihood, it will be 1-2 weeks prior to installation as my schedule at work is a bit erratic as of late. Suffice it to say, I could not be happier with my decision. One step closer to seeing track time! Many a thanks to Road Sport Supply/Stuttgart Performance for squaring me away as usual!
Prior to the days end, I publish the weights and diameter of the rotors. Stay tuned! |
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986 00S
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11-14-2011, 07:27 AM
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#18
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Registered User
Join Date: Aug 2009
Location: Music City U.S.A.
Posts: 166
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Quote:
Originally Posted by jaykay
Did they say what the rotor hat material is?? Oem tends to rust a bit. Will the parking brake work with them on rear rotors?
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If I am not mistaken, the OEM hat material is cast iron. Whereas the Girodisc's are aluminum. Yes, the parking brake will work with the rear OEM setup.
__________________
2003 Porsche Boxster S 3.2L l AASCO Lightweight Flywheel l FVD Brombacher ECU l FVD Brombacher 100 Cell Sport Catalytics l FVD Brombacher Sport Headers l GiroDisc 340mm FR Rotors l IPD Intake Plenum l Litronics l KW Variant 3 Coilovers l Porsche 997 75mm Throttle Body l Road Sport Supply Underdrive Pulley Kit l Sachs Stage 2 Racing Clutch Kit l TechArt Short Shift Kit l TechArt Power Flow Kit l TechArt Sport Exhaust.
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11-16-2011, 06:07 AM
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#19
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Registered User
Join Date: Jul 2011
Location: Albuquerque, NM
Posts: 56
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So how did you deal with changing the brake bias by installing larger diameter front rotors?
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11-16-2011, 06:56 AM
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#20
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Registered User
Join Date: May 2008
Location: Toronto
Posts: 2,656
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Quote:
Originally Posted by Cartel
In regards to acquiring the hats for stock rotors, I am unsure if that can be done. Your best bet is to contact Road Sport Supply directly. Included below is there contact information if you are interested.
Road Sport Supply/Stuttgart Performance
714.545.1046
714.432.8815
sales@roadsportsupply.com |
You cannot use the GiroDisc hats for factory rotors period. Factory rotors are not 2-piece design.
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