Been looking at upgrading the brakes on my DRB GT40 which runs standard 85-87 Corvette hubs. It's running stock Corvette brakes at the moment. Looking for reasonably economical ways to do this.
Lots of kits only seem to fit C4 models from 88 onwards.
Would like to do front and rear. Would like handbrake to still work, even though I don't use it.
Using new Ford GT as guide to determine proportions of front brake to back brake system. Although I don't know thicknesses of rotors, I expect the rear rotors will be thinner than the front. If anyone knows any more details like piston sizes, caliper area, rotor thickness/design, it would be interesting to know. Ford GT brake specs as I know them: 4 piston monoblock Brembo calipers, 356mm front, 335mm rear cross-drilled/slotted vented rotors.
My requirements:
1. If I'm going to do upgrade, might as well get serious.
2. Want something that can be DOT(engineer) approved. Well hopefully.
3. Must fit under 17" or 18" wheels.
4. Will be adding Tilton or Wilwood pedal box so I can get adjustable bias and master cyl. size correct for calipers.
5. Will be club raced and perform in a variety of events - Sprints, Motorkhanas, Go-To-Whoa, Drags etc.
6. Looks are also important. And to fill the Bling, Bling wheels. Some of sizes below are more for looks anyway. (Hey, I'll admin to that)
7. Wheel offset change isn't important as I haven't ordered my new wheels yet.
8. Budget limit is US$2500 for each end, would prefer less. Lots of other choices after US$2500 for serious brake upgrades.
This is what I've been able to come up with for front for bolt on kit(pads included):
1. Around US$800. There are lots of upgrades to Corvette C5 spec. 2 piston PBR Caliper, 300mm x 32mm rotors. Baer seems to be the biggest brand with this offering. (I really want more than this)
2. US$2400. Brembo Big Brake Kit. Brembo Lotus 4 Piston Caliper(2x36/40mm pistons), 2 piece 328mm x 28mm directional curve vein rotors. 54.2cm squared pad area. Stuck with Brembo for replacement parts, not available local. More info here.
3. US$2170. Porsche 993 turbo brake conversion. Brembo 993 Calipers(2x36/44mm pistons), 2 piece 322mm x 32mm directional curve vein rotors. 76.6cm suared pad area. Expensive replacement parts, but available local. More info here.
4. US$1100-$2200. (I expect not approvable, but good value) Wilwood 4 piston calipers, 1 piece 330mm x 28mm rotors. Through to Wilwood 6 piston calipers, 2 piece 355mm x 35mm rotors. Replacement Wilwood parts available cheaply here as well. More info here.
5. US$??? I can pick up new Porsche 996 GT3 calipers and rotors here in Aus for a good price. Need to manufacture/obtain hat & caliper adaptors though. Calipers are 4 piston monoblock(36/44mm) US$479. Rotors are 330mm x 34mm directional curve vein rotors US$147ea. OEM pads are $US111 This would leave US$1200 for manufacturing hats/adaptors and kit would cost the same as landed 993 kit above. All replacement parts would be cheaper. Gee I wonder how close those 993 hat adaptors are to fitting 996 and I can buy them separately.
For rear I don't have many bolt on options(pads included).
1. US$1949-$2369. (I expect not approvable, but good value) Wilwood 4 piston calipers, 1 piece 330mm x 22mm rotors through to 2 piece 355mm x 32mm. All kits include emergency brake(some sort of mechanical spot caliper I assume) More info here.
2. US$2170??? + handbrake cost. Porsche 993 turbo brake conversion. I would have to source or get fabricated caliper adaptors. Brembo 993 Calipers(2x36/44mm pistons), 2 piece 322mm x 32mm directional curve vein rotors. 76.6cm suared pad area. Expensive replacement parts, but available local. Have to work out handbrake??? More info here.
3. US$??? + handbrake cost. I can pick up new Porsche 996 GT3 calipers and rotors here in Aus for a good price. Need to manufacture/obtain hat & caliper adaptors though. Calipers are 4 piston monoblock(36/44mm) US$479. Rotors are 330mm x 34mm directional curve vein rotors US$147ea. OEM pads are $US111 This would leave US$1200 for manufacturing hats/adaptors and kit would cost the same as landed 993 kit above. All replacement parts would be cheaper. Gee I wonder how close those 993 hat adaptors are to fitting 996 and I can buy them separately. And I have to work out a handbrake.
4. Oops, ran out of choices already. /ubbthreads/images/graemlins/frown.gif
I'm really tending towards using either Porsche 993 or 996 calipers and rotors. I can even get custom caliper decals made for them. /ubbthreads/images/graemlins/smile.gif
Decisions, decisions... Any advice guys? /ubbthreads/images/graemlins/confused.gif /ubbthreads/images/graemlins/confused.gif /ubbthreads/images/graemlins/confused.gif
Lots of kits only seem to fit C4 models from 88 onwards.
Would like to do front and rear. Would like handbrake to still work, even though I don't use it.
Using new Ford GT as guide to determine proportions of front brake to back brake system. Although I don't know thicknesses of rotors, I expect the rear rotors will be thinner than the front. If anyone knows any more details like piston sizes, caliper area, rotor thickness/design, it would be interesting to know. Ford GT brake specs as I know them: 4 piston monoblock Brembo calipers, 356mm front, 335mm rear cross-drilled/slotted vented rotors.
My requirements:
1. If I'm going to do upgrade, might as well get serious.
2. Want something that can be DOT(engineer) approved. Well hopefully.
3. Must fit under 17" or 18" wheels.
4. Will be adding Tilton or Wilwood pedal box so I can get adjustable bias and master cyl. size correct for calipers.
5. Will be club raced and perform in a variety of events - Sprints, Motorkhanas, Go-To-Whoa, Drags etc.
6. Looks are also important. And to fill the Bling, Bling wheels. Some of sizes below are more for looks anyway. (Hey, I'll admin to that)
7. Wheel offset change isn't important as I haven't ordered my new wheels yet.
8. Budget limit is US$2500 for each end, would prefer less. Lots of other choices after US$2500 for serious brake upgrades.
This is what I've been able to come up with for front for bolt on kit(pads included):
1. Around US$800. There are lots of upgrades to Corvette C5 spec. 2 piston PBR Caliper, 300mm x 32mm rotors. Baer seems to be the biggest brand with this offering. (I really want more than this)
2. US$2400. Brembo Big Brake Kit. Brembo Lotus 4 Piston Caliper(2x36/40mm pistons), 2 piece 328mm x 28mm directional curve vein rotors. 54.2cm squared pad area. Stuck with Brembo for replacement parts, not available local. More info here.
3. US$2170. Porsche 993 turbo brake conversion. Brembo 993 Calipers(2x36/44mm pistons), 2 piece 322mm x 32mm directional curve vein rotors. 76.6cm suared pad area. Expensive replacement parts, but available local. More info here.
4. US$1100-$2200. (I expect not approvable, but good value) Wilwood 4 piston calipers, 1 piece 330mm x 28mm rotors. Through to Wilwood 6 piston calipers, 2 piece 355mm x 35mm rotors. Replacement Wilwood parts available cheaply here as well. More info here.
5. US$??? I can pick up new Porsche 996 GT3 calipers and rotors here in Aus for a good price. Need to manufacture/obtain hat & caliper adaptors though. Calipers are 4 piston monoblock(36/44mm) US$479. Rotors are 330mm x 34mm directional curve vein rotors US$147ea. OEM pads are $US111 This would leave US$1200 for manufacturing hats/adaptors and kit would cost the same as landed 993 kit above. All replacement parts would be cheaper. Gee I wonder how close those 993 hat adaptors are to fitting 996 and I can buy them separately.
For rear I don't have many bolt on options(pads included).
1. US$1949-$2369. (I expect not approvable, but good value) Wilwood 4 piston calipers, 1 piece 330mm x 22mm rotors through to 2 piece 355mm x 32mm. All kits include emergency brake(some sort of mechanical spot caliper I assume) More info here.
2. US$2170??? + handbrake cost. Porsche 993 turbo brake conversion. I would have to source or get fabricated caliper adaptors. Brembo 993 Calipers(2x36/44mm pistons), 2 piece 322mm x 32mm directional curve vein rotors. 76.6cm suared pad area. Expensive replacement parts, but available local. Have to work out handbrake??? More info here.
3. US$??? + handbrake cost. I can pick up new Porsche 996 GT3 calipers and rotors here in Aus for a good price. Need to manufacture/obtain hat & caliper adaptors though. Calipers are 4 piston monoblock(36/44mm) US$479. Rotors are 330mm x 34mm directional curve vein rotors US$147ea. OEM pads are $US111 This would leave US$1200 for manufacturing hats/adaptors and kit would cost the same as landed 993 kit above. All replacement parts would be cheaper. Gee I wonder how close those 993 hat adaptors are to fitting 996 and I can buy them separately. And I have to work out a handbrake.
4. Oops, ran out of choices already. /ubbthreads/images/graemlins/frown.gif
I'm really tending towards using either Porsche 993 or 996 calipers and rotors. I can even get custom caliper decals made for them. /ubbthreads/images/graemlins/smile.gif
Decisions, decisions... Any advice guys? /ubbthreads/images/graemlins/confused.gif /ubbthreads/images/graemlins/confused.gif /ubbthreads/images/graemlins/confused.gif